SCR DC MOTOR CONTROL

BC140 DC CONTROL

Installation and Operation Manual

MN703

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TABLE OF CONTENTS Section Page 1 Introduction.............................................................................................................................................................................3 Safety Warnings and Cautions ...............................................................................................................................................6 2 Quick Start Instructions...........................................................................................................................................................9 3 Mounting Instructions ...........................................................................................................................................................12 4 Electrical Instructions............................................................................................................................................................12 5 Application Information .........................................................................................................................................................15 6 Setting the Voltage Select Switch .........................................................................................................................................16 7 Trimpot Adjustments.............................................................................................................................................................17 8 Operation..............................................................................................................................................................................20 9 Diagnostic LEDs and Pilot Light............................................................................................................................................20 10 Troubleshooting....................................................................................................................................................................21 11 Optional Auxiliary Heat Sink (Catalog No. BC143) ...............................................................................................................23 12 Optional Forward-Brake-Reverse Switch (Catalog No. BC144) ............................................................................................24 Baldor District Offices .................................................................................................................................................................25 Limited Warranty.......................................................................................................................................................... Back Cover Tables Page 1 Standard Features..................................................................................................................................................................3 2 Optional Accessories..............................................................................................................................................................4 3 Electrical Ratings....................................................................................................................................................................4 4 Trimpot Adjustments...............................................................................................................................................................4 5 General Performance Specifications ......................................................................................................................................5 6 Barrier Terminal Block Wire and Tightening Torque Specifications ......................................................................................13 7 Armature and AC Line Fuse Selection..................................................................................................................................13 8 Plug-In Horsepower Resistor® and Armature Fuse Kit Information ......................................................................................14 9 Field Connection (Shunt Wound Motors Only)......................................................................................................................15 10 Troubleshooting Guide for Controls without Optional Forward-Brake-Reverse Switch Installed ...........................................21 11 Troubleshooting Guide for Controls with Optional Forward-Brake-Reverse Switch Installed ................................................22 Figures Page 1 Cover Layout ..........................................................................................................................................................................5 2 Mechanical Specifications ......................................................................................................................................................6 3 AC Line, Armature, Field (Shunt Wound Motors Only), and Ground Connections ..................................................................9 4 Control Layout and Internal Connection Diagram .................................................................................................................11 5 Voltage Select Switch Setting...............................................................................................................................................16 6 Acceleration Trimpot (ACCEL) Range ..................................................................................................................................17 7 Deceleration Trimpot (DECEL) Range..................................................................................................................................17 8 Minimum Speed Trimpot (MIN) Range .................................................................................................................................17 9 Maximum Speed Trimpot (MAX) Range ...............................................................................................................................18 10 Current Limit Trimpot (CL) Range.........................................................................................................................................18 11 IR Compensation Trimpot (IR) Range...................................................................................................................................19 12 Optional Auxiliary Heat Sink Mechanical Specifications........................................................................................................23 13 Optional Forward-Brake-Reverse Switch Connections .........................................................................................................24

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1 INTRODUCTION Thank you for purchasing the BC140, full-wave variable speed DC motor control. Baldor is committed to providing total customer satisfaction by producing quality products that are easy to install and operate. The BC140 offers the user the ultimate in reliability and performance at an affordable price. The BC140 represents the latest in state-of-the-art design, surface mount technology, incorporating advanced circuitry and technology for variable speed DC motor controls. It is rugged and compact in size and is able to handle both 115 and 208/230 Volt AC line inputs by setting the built-in Dual Voltage Switch. In addition, one model can be used on a wide range of motors by selecting and inserting the appropriate Plug-in Horsepower Resistor®. The standard model, BC140, controls all motors through 3/4 HP at 115 Volt AC line input and 1½ HP at 230 Volt AC line input. By installing the Auxiliary Heat Sink (see Table 2, on page 4), the horsepower range is increased to 1 HP at 115 Volt AC line input and 2 HP at 230 Volt AC line input. The versatility of the control is enhanced with the optional Forward-Brake-Reverse Switch Kit (Catalog No. BC144). The electronics for the BC140 consist of a patented speed control module. Its field-proven reliability is confirmed by over 100,000 controls presently in operation. The module is housed in a rugged metal enclosure (not plastic, like less expensive controls). Keyhole slots facilitate mounting and an easily accessible terminal block simplifies connections.

This product complies with all CE directives pertinent at the time of manufacture. Contact your local Baldor District Office for Declaration of Conformity. Installation of a CE approved RFI filter is required (see Table 2, on page 4).

TABLE 1 STANDARD FEATURES

Feature Description

Simple to Operate Does not require programming. Uses adjustable trimpots which are factory set for most applications.

AC Line Input Voltage (±15%, 50/60 Hz) 115 and 208/230 Volts AC

Dual Voltage Selection (Under the Front Cover) Allows for selection of 115 Volt or 208/230 Volt AC line input. (Factory set to the "230" Volt position.)

Plug-In Horsepower Resistor® (Supplied Separately)* Allows the control to be used on a wide range of motors. Fusing* Built-In AC Line Fuse. Armature Fuse (Supplied Separately). MOV Protection AC line input transient suppression.

Adjustable Trimpots Allow adjustment of Acceleration (ACCEL), Deceleration (DECEL), Minimum Speed (MIN), Maximum Speed (MAX), Current Limit (CL), and IR Compensation (IR).

Diagnostic LEDs Power On (PWR ON) and Current Limit (CL). *Plug-In Horsepower Resistor® and armature fuse must be properly selected to accurately calibrate the control.

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TABLE 2 OPTIONAL ACCESSORIES

Item Catalog No. Description

Auxiliary Heat Sink BC143 Extends the control's rating to 1 HP, at 115 Volts AC, and 2 HP, at 230 Volts AC. See Section 11, on page 23.

Forward-Brake-Reverse Switch BC144 Includes Forward-Brake-Reverse Switch with dynamic brake resistor. See Section 12, on page 24.

RFI Filter BC24-LF Panel mount. Rated 24 Amps at 115 and 208/230 Volts AC, single phase.Complies with CE Directive 89/336/EEC (EN55022 and/or EN55011) relating to the EMC Class A Industrial Standard.

TABLE 3 ELECTRICAL RATINGS

Maximum Rating without Auxiliary Heat Sink

Maximum Rating with Auxiliary Heat Sink

AC Line Voltage (± 15%, 50/60 Hz)

(Volts AC)

Motor Voltage

(Volts DC)

AC Line Current

(RMS Amps)

DC Load Current (Avg. Amps)

Horsepower(HP, KW))

AC Line Current

(RMS Amps)

DC Load Current (Avg. Amps)

Horsepower(HP, (KW))

115 90 – 130 12.0 6.0 0.75, (0.6) 16.0 12.0 1, (.75) 230 180 12.0 6.0 1.5, (1.1) 16.0 12.0 2, (1.5)

Notes: 1. The BC140 can be converted to the higher rating by installing the Auxiliary Heat Sink (Catalog No. BC143). 2. The BC140 must be set for either 115 or 208/230 Volt AC line input by setting the Voltage Select Switch to the "115"

or "230" position, respectfully. When the control is set for "115", use only 90 – 130 Volt DC rated motors. When the control is set for "230", use only 180 Volt DC rated motors.

3. Field voltage is 100 Volt DC with 115 Volt AC line input and 200 Volts DC with 230 Volt AC line input. Maximum Field current is 1.0 Amps DC.

TABLE 4 TRIMPOT ADJUSTMENTS

Trimpot Description Acceleration (ACCEL).

See Section 7.1, on page 17. Sets the amount of time for the motor to accelerate from zero speed to full speed.

Deceleration (DECEL). See Section 7.2, on page 17. Sets the amount of time for the motor to decelerate from full speed to zero speed.

Minimum Speed (MIN). See Section 7.3, on page 17. Sets the minimum speed of the motor.

Maximum Speed (MAX). See Section 7.4, on page 18. Sets the maximum speed of the motor.

Current Limit (CL). See Section 7.5, on page 18. Sets the maximum amount of DC current that the motor can draw.

IR Compensation (IR). See Section 7.6, on page 19. Sets the required voltage compensation to the motor to provide improved load regulation.

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TABLE 5 GENERAL PERFORMANCE SPECIFICATIONS1

Description Specification FactorySetting

Speed Range (Ratio) 50:1 — Armature Feedback Load Regulation (0 – Full Load, 50:1 Speed Range) (% Base Speed)) 12 — Line Voltage Regulation (at Full Load, ± 10% Line Variation) (% Base Speed) 0.52 — Control Linearity (% Speed vs. Dial Rotation) 2 — Acceleration (ACCEL) Trimpot Range (Seconds) 0.2 – 10 2 Deceleration (DECEL) Trimpot Range (Seconds) 0.2 – 10 2 Maximum Speed (MAX) Speed Trimpot Range (% Base Speed) 50 – 1102 100 Minimum Speed (MIN) Trimpot Range (% Base Speed) 0 – 302 0 CL/Torque Range (% Full Load) 0 – 200 150 IR Compensation (IR) Trimpot Range (at Specified Full Load at 90 / 180 Volts Output) (Volts DC) 0 – 24 / 0 – 48 3 / 6 Operating Temperature Range without Optional Auxiliary Heat Sink (Catalog No. BC143) (°C / °F) 0 – 50 / 32 – 122 — Operating Temperature Range with Optional Auxiliary Heat Sink (Catalog No. BC143) (°C / °F) 0 – 40 / 32 – 104 — Notes: 1. CE Compliance requires BC24-LF RFI Filter. (See Optional Accessories, Table 2, on page 4). 2. Performance is for 90 Volt PM motors with 115 Volt AC line input and 180 Volt DC PM motors with 230 Volt AC line

input.

FIGURE 1 COVER LAYOUT

(%) SPEEDFWD

10

REV

RB

K Motor

Before to Stop

Reversing

Allow

0

3020

5040

ON

90

OFF

100

7080

60

6

FIGURE 2 MECHANICAL SPECIFICATIONS (INCHES [mm])

[178]7.00

0.2[5.08]

0.359.0 4X Ø

0.39[9.91]4X Ø

5.63[143]

5.00

[105]

[127]4.125

4.00[102]

Note: See Section 11, on page 23, for optional Auxiliary Heat Sink (Catalog No. BC143) Mechanical Specifications.

SAFETY WARNINGS AND CAUTIONS

WARNING! – This statement indicates a potentially hazardous situation, which, if not avoided, could result in serious injury or death. CAUTION! – This statement indicates a potentially hazardous situation which, If not avoided, could result in damage to property. Note – This is additional information that is not critical to the installation or operation of the control.

WARNING! READ ALL SAFETY WARNINGS AND CAUTIONS, ON PAGES 6 – 8, BEFORE USING THE CONTROL. DISCONNECT THE MAIN POWER BEFORE MAKING CONNECTIONS TO THE CONTROL. TO AVOID ELECTRIC SHOCK, BE SURE TO PROPERLY GROUND THE CONTROL.

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SAFETY WARNINGS AND CAUTIONS (Continued)

WARNING! THIS EQUIPMENT MAY CONTAIN VOLTAGES AS HIGH AS 1000 VOLTS! ELECTRICAL SHOCK CAN CAUSE SERIOUS OR FATAL INJURY. ONLY QUALIFIED PERSONNEL SHOULD INSTALL AND PERFORM THE START-UP PROCEDURE OR TROUBLESHOOT THIS EQUIPMENT.

WARNING! ELECTRICAL SHOCK CAN CAUSE SERIOUS OR FATAL INJURY. BE SURE THAT ALL POWER IS DISCONNECTED FROM THE CONTROL BEFORE THE COVER IS OPENED. OPENING OF THE COVER IS REQUIRED TO MAKE INSTALLATION CONNECTIONS. ELECTRICAL SHOCK CAN CAUSE SERIOUS OR FATAL INJURY IF THE COVER IS REMOVED AND POWER IS STILL APPLIED.

WARNING! ELECTRICAL SHOCK CAN CAUSE SERIOUS OR FATAL INJURY. VERIFY THERE IS NO VOLTAGE PHASE-TO-PHASE OR PHASE-TO-NEUTRAL AT THE AC LINE CONDUCTORS BEFORE TOUCHING THE AC INPUT WIRES. DO NOT TOUCH LIVE WIRES. ALL POWER MUST BE DISCONNECTED BEFORE PROCEEDING.

WARNING! IT IS THE RESPONSIBILITY OF THE EQUIPMENT MANUFACTURER AND INDIVIDUAL INSTALLER TO SUPPLY THIS SAFETY WARNING TO THE ULTIMATE END USER OF THIS PRODUCT. (SW/FSC 5/2005) BE SURE TO FOLLOW ALL INSTRUCTIONS CAREFULLY. FIRE AND/OR ELECTROCUTION CAN RESULT DUE TO IMPROPER USE OF THIS PRODUCT.

WARNING! DO NOT USE THIS CONTROL IN AN EXPLOSIVE ENVIRONMENT. AN EXPLOSION CAN CAUSE SERIOUS OR FATAL INJURY. THIS CONTROL IS NOT EXPLOSION PROOF.

WARNING! HIGH VOLTAGE IS PRESENT IN THIS CONTROL. DISCONNECT MAIN POWER BEFORE MAKING CONNECTIONS TO THE CONTROL. THE COVER MUST BE PROPERLY INSTALLED AFTER ALL SETUP, CONNECTIONS, AND ADJUSTMENTS ARE COMPLETE. IT REDUCES ELECTRICAL SHOCK HAZARD. FAILURE TO OBSERVE THIS WARNING COULD RESULT IN ELECTRICAL SHOCK OR ELECTROCUTION.

WARNING! HIGH VOLTAGE IS PRESENT IN THE CONTROL. DISCONNECT MAIN POWER BEFORE MAKING CONNECTIONS TO THE CONTROL. DO NOT ADJUST TRIMPOTS WITH THE MAIN POWER APPLIED. IF ADJUSTMENTS ARE MADE WITH THE MAIN POWER APPLIED, AN INSULATED ADJUSTMENT TOOL (PROVIDED) MUST BE USED AND SAFETY GLASSES MUST BE WORN. FIRE AND/OR ELECTROCUTION CAN RESULT IF CAUTION IS NOT EXERCISED.

WARNING! AUTOMATIC START: THE CONTROL WILL AUTOMATICALLY START WHEN THE POWER IS APPLIED AND THE ON/OFF AC LINE SWITCH IS SET TO THE "ON" POSITION.

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SAFETY WARNINGS AND CAUTIONS (Continued)

WARNING! HIGH VOLTAGE IS PRESENT IN THIS CONTROL. DISCONNECT MAIN POWER BEFORE MAKING CONNECTIONS TO THE CONTROL. TO PREVENT ACCIDENTAL CONTACT WITH HIGH VOLTAGE, IT IS REQUIRED THAT THE COVER BE PROPERLY INSTALLED AFTER ALL SETUP, CONNECTIONS, AND ADJUSTMENTS ARE COMPLETE. THIS REDUCES ELECTRICAL SHOCK HAZARD. FAILURE TO OBSERVE THIS WARNING COULD RESULT IN ELECTRICAL SHOCK OR ELECTROCUTION.

WARNING! DO NOT DEPEND ON THE PILOT LIGHT OR THE PC BOARD MOUNTED LEDs FOR A GUARANTEED POWER OFF INDICATION. BE SURE ALL AC POWER IS "OFF" BEFORE SERVICING THE CONTROL TO AVOID ELECTRICAL SHOCK HAZARD.

WARNING! MAKE SURE THAT THE POTENTIOMETER IS SET FULLY COUNTERCLOCKWISE PRIOR TO APPLYING POWER. IF THIS IS NOT DONE, THE MOTOR WILL RUN AT THE SPEED SETTING AT POWER UP. THIS MAY CAUSE BODILY INJURY IF ONE IS IN CLOSE PROXIMITY OF MOVING PARTS.

WARNING! DO NOT SWITCH THE ARMATURE IN AND OUT OF CIRCUIT OR CATASTROPHIC FAILURE WILL RESULT. IF ARMATURE SWITCHING IS REQUIRED, USE THE OPTIONAL FORWARD-BRAKE-REVERSE SWITCH (CATALOG NO. BC144). CAUTION! Disconnect motor leads (A- and A+) from control before performing a "Leakage Resistance" test on the motor. Failure to disconnect motor from the control may result in extensive damage to the control. The control is tested at the factory for high voltage I leakage resistance as part of Underwriters Laboratories requirements. CAUTION! Instantaneously applying the Hi-Pot voltage will cause irreversible damage to the control. CAUTION! Suitable for use on a circuit capable of delivering not more than 5,000 RMS symmetrical short circuit amperes listed here at rated voltage. CAUTION! Proper shielding, grounding, and filtering of this product can reduce the emission of radio frequency interference (RFI) which may adversely affect sensitive electronic equipment. CAUTION! The Voltage Select Switch setting must match the actual AC line input voltage. Verify that the Voltage Select Switch is in the correct position ("115" position for 115 Volt AC line input and "230" position (factory setting) for 208/230 Volt AC line input). Do not use the "115V" position for 208/230 Volt AC line input voltage or damage will occur to the control. CAUTION! If the current limit is adjusted above 160% of the motor nameplate rating, this can cause overheating of the motor. CAUTION! Do not leave the motor in a locked rotor condition for more than a few seconds since damage may occur.

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2 QUICK START INSTRUCTIONS IMPORTANT – Read these simplified installation instructions before proceeding. These instructions are to be used as a reference only and are not intended to replace the detailed instructions provided herein. You must read the Safety Warnings and Cautions, on pages 6 – 8, before proceeding.

– Note –

A Plug-In Horsepower Resistor®, an AC Line Fuse, and an Armature Fuse (supplied separately),must be installed in order for this control to operate.

See Sections 4.2, 4.3, 4.4, and 4.6, on pages 13 and 14.

Note: See Table 6, on page 13, for Barrier Terminal Block wire size and recommended tightening torque specifications. See Table 9, on page 15 for Field connections (Shunt Wound Motors only).

2.1 AC Line Connection: Connect the AC

line input to Terminals "L1" (Line Fuse) and "L2", of the Barrier Terminal Block, as shown in Figure 3 and as described in Section 4.1, on page 13.

The Voltage Select Switch position must

match the AC line input voltage. See Section 6, on page 16.

Note: See Table 7, on page 13, for AC Line and Armature Fuse selection. These items must be installed for the control to operate.

2.2 Ground Connection: Connect all ground wires (earth), of connections to the control, to the green ground screw on

the chassis, as shown in Figure 3. 2.3 AC line Fusing: The control contains a built-in replaceable AC line fuse installed in the AC line fuse holder, as shown

in Figure 4, on page 11. Select the correct AC Line Fuse, as described in Table 7, on page 13.

Note: If fuse blows, check for wrong connections and shorted or grounded motor.

FIGURE 3 AC LINE, ARMATURE, FIELD*, AND GROUND CONNECTIONS

LINEFIELDARMATUREA- A+ F- F+ L1 L2 GND

*F- and F+ are Field connections for Shunt Wound Motors only.

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2.4 Armature Fusing: Select an armature fuse (supplied separately) and install in the armature fuse holder, as shown in Figure 4, on page 11. Select the correct Armature Fuse as shown in Table 7, on page 13. (See note below.)

2.5 Plug-In Horsepower Resistor®: Select the correct Plug-In Horsepower Resistor® (supplied separately), according to

armature voltage and motor horsepower information in Table 7, on page 13. Install the correct Plug-In Horsepower Resistor® as shown in Figure 4, on page 11. (See note below.)

2.6 Permanent Magnet (PM) Motor Armature Connection: Connect the motor armature to Terminals "A+" and "A-" of

the Barrier Terminal Block, as shown in Figure 3, on page 9.

2.7 Motor Field (Shunt Wound Motors Only): Connect the motor field (of the shunt wound motor) to the Barrier Terminal Block. For full voltage field, use Terminals F+ (positive) and F- (negative). For half voltage field, use Terminals F+ (positive) and L1 (negative). See Section 4.8, on page 15.

CAUTION! Do not connect motor armature leads to Terminals "F+" and "F-". Do not use Terminals "F+" and "F-" for

any purpose other than to power the field of a shunt wound motor. Shunt wound motors may be damaged if the field remains energized without armature rotation for an extended period of time.

2.8 Voltage Select Switch: The Voltage Select Switch must be set as described in Section 6, on page 16. For 208/230 Volt AC line input, set the Voltage Select Switch to the "230" position (factory setting). For 115 Volt AC line input, set the Voltage Select Switch to the "115" position.

2.9 Trimpot Settings: All trimpots have been factory set for most applications, as shown in Figure 4, on page 11. The trimpots may be readjusted, as described in Section 7, on page 17.

2.10 Diagnostic LEDs and Pilot Light: After power has been applied to the control, observe the front panel indicator and the board mounted LEDs, to verify proper control operation, as described in Section 9, on page 20.

2.11 Optional Auxiliary Heat Sink (BC143): Extends the horsepower rating of the control to 1 HP, with 115 Volts AC line input, and 2 HP, with 230 volts AC line input. See Table 2, on page 4, and Section 11, on page 23.

2.12 Optional Forward-Brake-Reverse Switch (BC144): Used to dynamically brake the motor. It provides run/brake and forward-brake-reverse operations. See Table 2, on page 4, and Section 12, on page 24.

Note: The Armature Fuse is supplied with the Plug-In Horsepower Resistor® Kit. See Table 8, on page 14, for Catalog No. and ratings.

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FIGURE 4 CONTROL LAYOUT AND INTERNAL CONNECTION DIAGRAM

A- A+ F- F+ L1 L2 GND

F-

ARMATURE FIELD LINE

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3 MOUNTING INSTRUCTIONS The control is designed with a NEMA-1 / IP-40 enclosure for indoor use. It is recommended that the control be mounted

vertically on a flat surface with adequate ventilation. Leave enough room below the control to allow for AC line and motor connections and any other connections that are required. A mounting template is included to facilitate mounting of the control. See Figure 2, on page 6.

Care should be taken to avoid extreme hazardous locations where physical damage can occur. The control should be

located in an area where it will not be exposed to contaminants such as water, metal chips, solvents or excessive vibration. Without the Auxiliary Heat Sink, the temperature around the control must not exceed 50 °C (122 °F). With the Auxiliary Heat

Sink, the temperature around the control must not exceed 40 °C (104 °F). The control is designed with a removable cover. To remove the cover, the two screws must be removed. After mounting

the control and all connections are completed, install the cover and secure it with the two screws. Tighten the screws to 5 lbs-in (6 kg-cm). Do not overtighten.

4 ELECTRICAL INSTRUCTIONS

See Table 6, on page 13, for Barrier Terminal Block wire size and recommended tightening torque specifications.

WARNING! READ SAFETY WARNING AND CAUTIONS, ON PAGES 6 – 8, BEFORE USING THIS CONTROL. DISCONNECT THE MAIN POWER BEFORE MAKING CONNECTIONS TO THE CONTROL.

WARNING! - TO AVOID ERRATIC OPERATION, DO NOT BUNDLE THE AC LINE AND MOTOR WIRES WITH WIRES FROM SIGNAL FOLLOWING, START/STOP CONTACTS, OR ANY OTHER SIGNAL WIRES. ALSO, DO NOT BUNDLE MOTOR WIRES FROM MULTIPLE CONTROLS IN THE SAME CONDUIT. USE SHIELDED CABLES ON ALL SIGNAL CONNECTIONS OVER 12" (30 CM). THE SHIELD SHOULD BE EARTH GROUNDED ON THE CONTROL SIDE ONLY. WIRE THE CONTROL IN ACCORDANCE WITH THE NATIONAL ELECTRICAL CODE REQUIREMENTS AND OTHER LOCAL CODES THAT MAY APPLY.

WARNING! DO NOT CONNECT SWITCHES OR RELAYS IN SERIES WITH ARMATURE OR CATASTROPHIC FAILURE WILL RESULT. CAUTION! The Voltage Select Switch position must match the AC line input voltage ("115" position for 115 Volt AC line input and "230" position (factory setting) for 208/230 Volt AC line input). CAUTION! If control is connected to a transformer, it is advisable to switch the secondary to disconnect power. If the primary is switched, additional snubber capacitors may have to be added across the transformer ouput to prevent damage to the power bridge.

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TABLE 6 BARRIER TERMINAL BLOCK WIRE AND TIGHTENING TORQUE SPECIFICATIONS

Maximum Wire Size (Cu) Maximum 50 Ft. Maximum 100 Ft.

Recommended Tightening Torque

Maximum Motor Current

(Amps DC)

90 – 130 Volt DC Motors

(Maximum HP)

180 Volt DC Motors

(Maximum HP) AWG mm2 AWG mm2 lb-in kg-cm 6 1/2 1 16 1.3 14 2.1 12 13.8 12 1 2 14 2.1 12 3.3 12 13.8

4.1 AC Line Connection: Connect the AC line input to Terminals "L1" (Line Fuse) and "L2", as shown in Figure 3, on page 9. If one of the AC line inputs is a neutral (N), connect it to Terminal "L2".

Note: This control operates on 115 or 208/230 Volt AC line input and is factory set for 208/230 Volt AC line input (Voltage Select Switch is factory set to the "230" position). See Section 6, on page 16.

4.2 Ground Connection: Connect all ground wires (earth), of connections to the control, to the green ground screw on the chassis, as shown in Figure 3, on page 9.

4.3 AC Line and Armature Fusing: The AC Line fuse is factory installed. The Armature fuse (supplied separately) must be installed in the armature fuse holder, as shown in Figure 4, on page 11. Select the correct fuses, as shown in Table 7. Fuses are available from your distributor. All fuses should be normal blow ceramic 3AG, MDA, or equivalent. On domestic 230 Volt AC lines, separate branch circuit protection for each line must be used.

TABLE 7 ARMATURE AND AC LINE FUSE SELECTION

Horsepower Fuse Selection (Amps) 90 Volt DC

Motors 180 Volt DC

Motors

Approximate Motor Current

(Amps DC) Armature Line 1/100 1/50 0.2 0.5 12 1/50 1/25 0.3 0.5 12 1/30 1/15 0.33 0.5 12 1/20 1/10 0.5 0.75 12 1/15 1/8 0.8 1 12 1/12 1/6 0.85 1.25 12 1/8 1/4 1.3 2 12 1/6 1/3 2 2.5 12 1/4 1/2 2.5 4 12 1/3 3/4 3.3 5 12 1/2 1 5.0 8 12 3/4 1½ 7.5 12 12 1* 2* 10 15 25

*With optional Auxiliary Heat Sink (Catalog No. BC143).

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4.4 AC Line Fuse: The AC Line Fuse acts as a disconnect in case of a catastrophic failure. If the AC Line Fuse blows, the control is miswired, the motor is shorted or grounded, or the control is defective.

Note: Fuse each AC line conductor that is not at ground potential.

4.5 Armature Fuse: The Armature Fuse acts as a diagnostic indicator. If the Armature Fuse blows, it indicates that there is a problem after the control's output. The Armature Fuse required can be calculated by multiplying the maximum DC Motor Current times 1.7.

4.6 Plug-In Horsepower Resistor®: A Plug-In Horsepower Resistor® (supplied separately) must be installed to match

the control to the motor horsepower and voltage in order for the IR Compensation and Current Limit settings to be correct. Select the proper Plug-In Horsepower Resistor® according to Table 8. Selecting the proper Plug-In Horsepower Resistor® is as important as selecting the proper Armature Fuse.

Plug-In Horsepower Resistors® are available from your distributor. Install the Plug-In Horsepower Resistor®, as

shown in Figure 4, on page 11.

Note: Be sure the Plug-In Horsepower Resistor® is inserted completely into the mating sockets.

TABLE 8 PLUG-IN HORSEPOWER RESISTOR® AND ARMATURE FUSE KIT INFORMATION

Plug-In Horsepower Resistor® and Armature Fuse Kit Motor Horsepower

Armature Voltage 90 – 130 Volts DC

Armature Voltage 180 Volts DC

Approximate Motor Current

(Amps DC)

Plug-In Horsepower Resistor®

Value (Ohms)

Armature Fuse Rating (Amps) Catalog No.

1/100 1/50 0.2 1.0 0.5 BR1000 1/50 1/25 0.3 0.51 0.5 BR0510 1/30 1/15 0.33 0.35 0.5 BR0350 1/20 1/10 0.5 0.25 0.75 BR0250 1/15 1/8 0.8 0.25 1 BR0251 1/12 1/6 0.85 0.18 1.25 BR0180 1/8 1/4 1.3 0.1 2 BR0100 1/6 1/3 2 0.1 2.5 BR0101 1/4 1/2 2.5 0.05 4 BR0050 1/3 3/4 3.3 0.035 5 BR0035 1/2 1 5 0.025 8 BR0025 3/4 1½ 7.5 0.015 12 BR0015SP 1* 2* 10 0.01 15 BR0010SP

*With optional Auxiliary Heat Sink (Catalog No. BC143).

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4.7 Permanent Magnet (PM) Motor Armature Connection: Connect the motor armature positive lead (+) to Terminal "A+" and negative lead (-) to Terminal "A-", on the Barrier Terminal Board, as shown in Figure 4, on page 11. Be sure the correct Plug-In Horsepower Resistor® and Armature Fuse are installed, as described in Sections 4.5 and 4.6, on page 14.

4.8 Shunt Wound Motor Field Connection (Shunt Wound Motors Only):

CAUTION! Do not connect motor armature leads to Terminals "F+" and "F-". Do not use Terminals "F+" and "F-" for any purpose other than to power the field of a shunt wound motor. Shunt wound motors may be damaged if the field remains energized without armature rotation for an extended period of time.

4.8.1 Full Voltage Field: Connect the field positive (+) lead to Terminal "F+" and the negative lead (-) to Terminal

"F-", on the Barrier Terminal Block, and as described in Table 9. See Figure 4, on page 11.

4.8.2 Half Voltage Field: For 50 Volt DC with 100 Volt rated armature, use Terminal "L1" and F+, on the terminal board, as described in Table 9. See Figure 4, on page 11.

TABLE 9

FIELD CONNECTION (SHUNT WOUND MOTORS ONLY)

AC Input voltage (Volts AC)

Voltage Selector Switch

(Position) Armature Voltage

(Volts DC) Field Voltage

(Volts DC) Terminal

Connections 100 F+, F- 115 115 0 – 90 50 F+, L1

0 – 180 200 F+, F- 208/230 230 0 – 90* 100 F+, L1 *Step-down operation.

5 APPLICATION INFORMATION

5.1 Motor Type: The BC140 is designed for permanent magnet (PM) and Shunt Wound DC motors. Controls operated on 115 Volt AC line input are designed for 90 Volt SCR rated motors. Controls operated on 230 Volt AC line input are designed for 180 and 90 Volt (step-down) SCR rated motors. Use of higher voltage motors will result in a reduction of the available maximum speed. Also, if motor is not an SCR rated type, the actual AC line amperage of the control, at full load, should not exceed the motor’s DC nameplate rating.

5.2 Torque Requirements: The motor selected for the application must be capable of supplying the necessary torque. In order to ensure the motor is not overloaded, a DC ammeter should be connected in series with the armature. Be sure the current under full load does not exceed the motor nameplate rating.

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5.3 Acceleration Start: The BC140 contains an adjustable acceleration start feature which allows the motor to smoothly accelerate from zero speed to full speed over a time period of 0.2 – 10 seconds. The acceleration trimpot (ACCEL) is factory set for 2 seconds.

5.4 Limitation In Use: The BC140 controls are designed for use on machine applications.

WARNING - DO NOT SWITCH THE ARMATURE IN AND OUT OF CIRCUIT OR CATASTROPHIC FAILURE WILL RESULT. IF ARMATURE SWITCHING IS REQUIRED, USE BC144 FORWARD-BRAKE-REVERSE SWITCH KIT. CAUTION! Contact your local Baldor District Office before using this control on constant horsepower applications such as saws and drill presses. Do not use this control in an explosive atmosphere. Be sure the BC140 is used within its ratings. Follow all instructions carefully.

6 SETTING THE VOLTAGE SELECT SWITCH

WARNING! READ ALL SAFETY WARNINGS AND CAUTIONS, ON PAGES 6 – 8, BEFORE ATTEMPTING TO OPERATE THE CONTROL OR SEVERE INJURY OR DEATH CAN RESULT. FAILURE TO FOLLOW THE WARNINGS AND CAUTIONS, MAY RESULT IN ELECTRIC SHOCK, FIRE OR EXPLOSION.

The Voltage Select Switch is located under the cover and must be set before applying power to the control. See Figure 5.

6.1 For 208/230 Volt AC Line Input: Set the Voltage Select Switch to the "230" position (factory setting). The switch

toggle should be in the lower position with "230" displayed at the top.

6.2 For 115 Volt AC Line Input: Set the Voltage Select Switch to the "115" position. The switch toggle should be in the upper position with "115" displayed at the bottom.

FIGURE 5

VOLTAGE SELECT SWITCH SETTING 208/230 Volt AC Line Input

(Factory Setting) 115 Volt AC Line Input

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7 TRIMPOT ADJUSTMENTS The control contains trimpots which have been factory set for most applications. Figure 4, on page 11, illustrates the location of the trimpots and their approximate factory set positions. Some applications may require readjustment of the trimpots in order to set the control for a specific requirement. See Table 5, on page 5, for range and factory setting of all trimpots. The trimpots may be readjusted as follows.

WARNING! IF POSSIBLE, DO NOT ADJUST TRIMPOTS WITH THE MAIN POWER APPLIED. IF ADJUSTMENTS ARE MADE WITH THE MAIN POWER APPLIED, AN INSULATED ADJUSTMENT TOOL MUST BE USED AND SAFETY GLASSES MUST BE WORN. HIGH VOLTAGE EXISTS IN THIS CONTROL. ELECTROCUTION CAN RESULT IF CAUTION IS NOT EXERCISED. SAFETY WARNINGS AND CAUTIONS, ON PAGES 6 – 8, MUST BE READ AND UNDERSTOOD BEFORE PROCEEDING. 7.1 Acceleration Trimpot (ACCEL): The ACCEL Trimpot is provided to allow for a

smooth start over an adjustable time period each time the AC power is applied or the Main Speed Potentiometer is adjusted to a higher speed. The ACCEL Trimpot is factory set to 2 seconds, which is the amount of time it will take for the motor to accelerate from zero speed to full speed. To increase the acceleration time, rotate the ACCEL Trimpot clockwise. To decrease the acceleration time, rotate the ACCEL Trimpot counterclockwise. The ACCEL Trimpot range is 0.2 – 10 seconds. See Figure 6.

7.2 Deceleration Trimpot (DECEL): The DECEL Trimpot controls the amount of ramp-down time when the Main Speed Potentiometer is adjusted to a lower speed. The DECEL Trimpot is factory set to 2 seconds, which is the amount of time it will take for the motor to decelerate from full speed to zero speed. To increase the deceleration time, rotate the DECEL Trimpot clockwise. To decrease the deceleration time, rotate the DECEL Trimpot counterclockwise. The DECEL Trimpot range is 0.2 – 10 seconds. See Figure 7.

Note: If the DECEL Trimpot is set to greater than the natural coast time of the motor and actual load, it will extend the deceleration time of the motor.

7.3 Minimum Speed Trimpot (MIN): The MIN Trimpot sets the minimum speed of the motor when the Main Speed Potentiometer is set fully counterclockwise. The MIN Trimpot is factory set to 0% of base motor speed. To increase the minimum speed, rotate the MIN Trimpot clockwise. To decrease the minimum speed, rotate the MIN Trimpot counterclockwise. The MIN Trimpot range is 0% – 30% of base motor speed. See Figure 8.

Note: Readjusting the MIN Trimpot will affect the maximum speed setting. Therefore, it is necessary to readjust the MAX Trimpot if readjusting the MIN Trimpot. It may be necessary to repeat these adjustments until both the minimum and maximum speeds are set to the desired levels.

FIGURE 6 ACCEL TRIMPOT RANGE

FIGURE 7 DECEL TRIMPOT RANGE

FIGURE 8 MIN TRIMPOT RANGE

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7.4 Maximum Speed Trimpot (MAX): The MAX Trimpot sets the maximum speed of the motor when the Main Speed Potentiometer is set fully clockwise. The MAX Trimpot is factory set to 100% of base motor speed. To increase the maximum speed, rotate the MAX Trimpot clockwise. To decrease the maximum speed, rotate the MAX Trimpot counterclockwise. The MAX Trimpot range is 50% – 110% of base motor speed. See Figure 9.

Note: Do not adjust the maximum speed above the rated motor RPM or unstable operation may occur. For moderate changes in the maximum speed, there will be a slight effect on the minimum speed setting when the minimum is set to zero. There may be significant variation in the minimum speed setting if the minimum speed is at a higher than zero setting.

7.5 Current Limit Trimpot (CL): The CL Trimpot is used to limit the maximum current (torque) to the motor. The CL also protects the control from excessive current during startup. The CL Trimpot is factory set to 150% of the full load current rating of the motor. To increase the current limit, rotate the CL Trimpot clockwise (do not exceed 200% of the full load current rating of the motor (maximum clockwise position)). To decrease the current limit, rotate the CL Trimpot counterclockwise. On cyclical loads, it may be normal for the CL LED to momentarily flash. (Visible only if the cover is removed.) The CL Trimpot range is 0% – 200% of the full load current rating of the motor. Some application may require a lower value so as not to damage process material or drive train components. See Figure 10.

Note: In order for the Current Limit to operate properly, the correct Plug-In Horsepower Resistor® must be installed for the particular motor and input voltage being used, as described in Section 4.6, on page 14. Calibration of the CL Trimpot is normally not required when the proper Plug-In Horsepower Resistor® is installed. To Recalibrate the CL Trimpot: 7.5.1 Disconnect the AC power and connect a DC ammeter in series with either motor armature lead. If only an AC

ammeter is available, connect it in series with either AC line input lead.

7.5.2 Set the Main Speed Potentiometer to approximately 30% – 50% clockwise position.

7.5.3 Set the CL Trimpot fully counterclockwise. The CL LED will illuminate red.

7.5.4 Load the motor shaft in accordance with application requirements.

7.5.5 Apply power and rotate the CL Trimpot clockwise until the desired current reading is observed on the DC ammeter. Factory Current Limit setting is 150% of the full load current rating of the motor. If using an AC ammeter connected in the AC line input, the factory Current Limit setting will read 75% of the full load current rating of the motor. Do not exceed 200% of the full load current rating of the motor (maximum clockwise position).

WARNING! DO NOT LEAVE MOTOR SHAFT LOCKED FOR MORE THAN 2 – 3 SECONDS OR MOTOR DAMAGE MAY RESULT.

FIGURE 9 MAX TRIMPOT RANGE

FIGURE 10 CL TRIMPOT RANGE

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7.6 IR Compensation Trimpot (IR): The IR Trimpot sets the amount of compensating voltage required to keep the motor speed constant under varying loads. If the load does not vary substantially, the IR Trimpot may be set to a minimum level (approximately 1/4 of full clockwise rotation). The IR Trimpot is factory set to provide 3 Volts of compensation for controls with 90 Volt DC output and 6 Volts of compensation for controls with 180 Volt DC Output. To increase the amount of compensating voltage, rotate the IR Trimpot clockwise. To decrease the amount of compensating voltage, rotate the IR Trimpot counterclockwise. See Figure 11.

Note: In order for the IR Compensation to operate properly, the correct Plug-In Horsepower Resistor® must be installed for the particular motor and input voltage being used, as described in Section 4.6, on page 14. Calibration of the IR Trimpot is normally not required when the proper Plug-In Horsepower Resistor® is installed. Excessive IR Compensation will cause the motor to become unstable, which causes cogging ("hunting" or "zooming"). To Recalibrate the IR Trimpot: 7.6.1 Set the IR Trimpot to approximately 25% rotation.

7.6.2 Run the motor unloaded at approximately 1/3 speed and record the RPMs.

7.6.3 Run the motor with the maximum load and adjust the IR Trimpot so that the motor speed under load equals the

unloaded speed recorded in step 2.

7.6.4 Remove the load and recheck the RPMs.

7.6.5 If the unloaded RPM has changed, repeat steps 7.6.2 – 7.6.4 for better regulation. The control is now compensated to provide minimal speed change due to changing loads.

FIGURE 11 IR TRIMPOT RANGE

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8 OPERATION

WARNING! READ SAFETY WARNINGS AND CAUTIONS, ON PAGES 6 – 8, BEFORE OPERATING THIS CONTROL OR SEVERE INJURY OR DEATH CAN RESULT.

8.1 With no AC power applied and the On/Off AC Line Switch set to the "OFF" position, remove the front cover by

unscrewing the two cover screws. See Figure 1, on page 5.

8.2 Set the Voltage Select Switch to the correct position, corresponding to the AC line input voltage. ("115" position for 115 Volt AC line input and "230" position (factory setting) for 208/230 Volt AC line input). See Figure 1, on page 5.

8.3 Install the correct Armature Fuse, as shown in Table 7, on page 13, and the correct Plug-In Horsepower Resistor® as shown in Table 8, on page 14.

8.4 Recheck all input AC line and motor connections. See Figure 3, on page 9.

8.5 Set the Main Speed Potentiometer to 0% (fully counterclockwise).

8.6 Set the Forward-Brake-Reverse Switch (if installed) to the "FWD" or "REV" position.

8.7 Set the On/Off AC Line Switch to the "ON" position. Observe that the Pilot Light illuminates. Gradually increase the Main Speed Potentiometer. The motor should smoothly come up to the desired speed and remain stable.

9 DIAGNOSTIC LEDs AND PILOT LIGHT

The BC140 has PC board mounted LEDs, to display the control's operational status and a panel-mounted Pilot Light. See Figure 4, page 11, for the location of the LEDs. See

9.1 Power On (PWR ON) LED and Pilot Light: When the AC power is applied to the control and the On/Off AC Line

Switch is set "ON", the PWR ON LED, on the PC board, will illuminate green and the Pilot Light, on the front cover, will illuminate orange.

9.2 Current Limit (CL) LED: The CL LED will illuminate red when the motor is overloaded, indicating that the current limit set point has been reached (set by the CL Trimpot). See Section 7.5, on page 18.

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10 TROUBLESHOOTING Table 10 is a troubleshooting guide for controls without the optional Forward-Brake Reverse Switch installed. Table 11, on page 22, is a troubleshooting guide for controls with the Forward-Brake-Reverse Switch installed. Both tables provide information on symptoms, their possible causes, and suggested corrective actions.

WARNING! HIGH VOLTAGE IS PRESENT IN THIS CONTROL. DISCONNECT MAIN POWER BEFORE MAKING CONNECTIONS TO THE CONTROL. THE COVER MUST BE PROPERLY SECURED, AFTER ALL SETUP CONNECTIONS, AND ADJUSTMENTS ARE COMPLETE. THIS REDUCES ELECTRICAL SHOCK HAZARD. FAILURE TO OBSERVE THIS WARNING COULD RESULT IN ELECTRICAL SHOCK OR ELECTROCUTION.

WARNING! HIGH VOLTAGE IS PRESENT IN THE CONTROL. IF POSSIBLE, DO NOT ADJUST TRIMPOTS WITH THE MAIN POWER APPLIED. IF ADJUSTMENTS ARE MADE WITH THE MAIN POWER APPLIED, AN INSULATED ADJUSTMENT TOOL (PROVIDED) MUST BE USED AND SAFETY GLASSES MUST BE WORN. FIRE AND/OR ELECTROCUTION CAN RESULT IF CAUTION IS NOT EXERCISED.

TABLE 10

TROUBLESHOOTING GUIDE FOR CONTROLS WITHOUT OPTIONAL FORWARD-BRAKE-REVERSE SWITCH INSTALLED Symptom Possible Cause Suggested Corrective Action

On/Off AC Line Switch in "OFF" position. Set On/Off Switch to "ON" position.

Blown Line fuse. Replace Line Fuse. See Table 7, on page 13.

Motor is not running and Pilot Light not illuminated.

Defective On/Off AC Line Switch, Replace On/Off AC Line Switch. Main Speed Potentiometer set fully counterclockwise.

Rotate Main Speed potentiometer clockwise.

Defective motor. Check for defective motor, worn brushes, etc. Replace motor, if necessary.

Plug-In Horsepower Resistor® not installed.

Install the correct Plug-In Horsepower Resistor®. See Table 8, on page 14.

Blown Armature Fuse. Replace Armature Fuse. See Table 7, on page 13.

Motor does not run and Pilot Light is illuminated.

CL Trimpot set fully counterclockwise. Set CL Trimpot, as described in Section 7.5, on page 18.

Low AC line input voltage. Check AC line input voltage. Overload condition. Reduce load. Control in current limit mode (CL trimpot not set correctly), CL LED is illuminated.

Increase setting of CL Trimpot, as described in Section 7.5, on page 18.

Incorrect Plug-In Horsepower Resistor®. Install the correct Plug-In Horsepower Resistor®. See Table 8, on page 14.

Motor hums, runs at very low speed, or slows down substantially when load is applied.

Motor armature and field connections interchanged (shunt motor only). Correct the connections.

Table 10 continued on next page…

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TABLE 10 (CONTINUED) TROUBLESHOOTING GUIDE

FOR CONTROLS WITHOUT OPTIONAL FORWARD-BRAKE-REVERSE SWITCH INSTALLED Symptom Possible Cause Suggested Corrective Action

Overload condition. Remove overload.

Incorrect Plug-In Horsepower Resistor®. Install the correct Plug-In Horsepower Resistor®. See Table 8, on page 14.

CL and/or IR Trimpots may be set incorrectly.

Readjust the CL and/or IR Trimpots, as described in Sections 7.5 and 7.6, on pages 18 and 19.

Defective speed control module. Replace speed control.

Voltage Select Switch set to wrong position.

Recheck line voltage and the correct setting of the Voltage Select Switch, as described in Section 6, on page 16.

Erratic motor performance.

Defective motor, worn brushes, etc. Repair or replace motor. MIN speed trimpot set higher than 0% of base speed.

Readjust the MIN Trimpot, as described in Section 7.3, on page 17. Motor continues to run with Main Speed

Potentiometer set fully counterclockwise. IR Comp trimpot set too high. Readjust the IR Trimpot, as described in Section 7.6, on page 19.

Motor runs in wrong direction. Motor armature leads are reversed. Reconnect motor armature leads.

TABLE 11 TROUBLESHOOTING GUIDE

FOR CONTROLS WITH OPTIONAL FORWARD-BRAKE-RESISTOR SWITCH INSTALLED Symptom Possible Cause Suggested Corrective Action

Faulty wiring or loose connections to the reversing switch.

Correct the connections. See Figure 13, on page 24. Motor will not run in Forward or Reverse

direction. Forward-Brake-Reverse Switch is defective.

Replace Forward-Brake-Reverse Switch assembly.

Faulty connections or loose connections. Check and correct connections. No braking action in brake mode. Defective Brake Resistor. Replace Forward-Brake-Reverse Switch

assembly.

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11 OPTIONAL AUXILIARY HEAT SINK (CATALOG NO. BC143) The optional Auxiliary Heat Sink (Catalog No. BC143) is used to increase the rating of the control. See Table 3, on page 4. The control is mounted on the four (4) holes with four (4) mounting screws (supplied), as shown in Figure 12.

FIGURE 12 OPTIONAL AUXILIARY HEAT SINK MECHANICAL SPECIFICATIONS

[34.9]1.375

6.29[160]

7.00[178]

[142]5.61

[143]5.63

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12 OPTIONAL FORWARD-BRAKE-REVERSE SWITCH (CATALOG NO. BC144)

WARNING! READ SAFETY WARNING AND CAUTIONS, ON PAGES 6 – 8, BEFORE USING THIS CONTROL. DISCONNECT THE MAIN POWER BEFORE MAKING CONNECTIONS TO THE CONTROL. The optional Forward-Brake-Reverse Switch (Catalog No. BC144) is used to dynamically brake the motor and reverse motor direction. The switch assembly is to be installed in the mounting hole provided on the control. See the installation instructions MN1372, provided with the Forward-Brake-Reverse Switch kit for detailed information on mounting and connections. Figure 13 shows the connections of the Forward-Brake-Reverse Switch to the speed control and the Barrier Terminal Block.

FIGURE 13 OPTIONAL FORWARD-BRAKE-REVERSE SWITCH CONNECTIONS

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BALDOR DISTRICT OFFICES

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BALDOR DISTRICT OFFICES

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continued on next page…

27

BALDOR DISTRICT OFFICES

International Sales (Continued) JAPAN DIA Building 802, 2-21-1 Tsuruya-Cho, Kanagawa-Ku Yokohama, 221-0835, Japan Phone: 81-45-412-4506 Fax: 81-45-412-4507 KOREA Room 208-37 Incheon Industrial Goods Circulating Center Songhyeon 3-Dong, Dong-Gu Incheon Korea, 401-705 Phone: 82 32 588 3253 Fax: 82 32 588 3254 MÉXICO KM. 2.0 Boulevard Al Aeropuerto Leoó 37545, Guanajuato, México Phone: 52 477 761 2030 Fax: 52 477 761 2010

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LIMITED WARRANTY For a period of 2 years from the date of original purchase, Baldor will repair or replace without charge, controls which our examination proves to be defective in material or workmanship. This warranty is valid if the unit has not been tampered with by unauthorized persons, misused, abused, or improperly installed and has been used in accordance with the instructions and/or ratings supplied. The warranty is in lieu of any other warranty or guarantee, expressed or implied. Baldor shall not be held responsible for any expense, including installation and removal, inconvenience, or consequential damage, including injury to any person, caused by items of our manufacture or sale. (Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above exclusion may not apply.) In any event, Baldor’s total liability, under all circumstances, shall not exceed the full purchase price of the control. Claims for purchase price refunds, repairs, or replacements must be referred to Baldor with all pertinent data as to the defect, the date purchased, the task performed by the control, and the problem encountered. No liability is assumed for expendable items, such as fuses. Goods may be returned only with written notification including a Baldor Return Authorization Number and any return shipments must be prepaid.

Baldor Electric Company P. O. Box 2400

Ft. Smith, AR 72902-2400 (479) 646- 4711

Fax (479) 648-5792

A40244 – Rev. C – 3/11/2009 Print Code