operation instruction manual pulse 2.200 ls dual...

Operation Instruction Manual

Pulse 2.200 LS Dual 200W 100V line Amplifier with Monitoring

Features The P2.200 LS amplifier contains two identical independent amplifier modules. Each has one Main and one Aux. input. Routing logic allows the Main and Aux. to mix; this allows the monitoring tone to pass at all times and the monitoring system to operate. If the PTT is operated, the Main input overrides the Aux. Each module’s status is displayed on the front panel along with an output level bar graph and status indicators. All sections of the amplifier and charger are constantly monitored for faults or abnormal operation: 1 The load monitoring checks the power absorbed by the loudspeaker load at 22 kHz and compares this

with the threshold and window levels set at installation. If the power drawn deviates outside the window a fault is indicated on the front and rear of the unit and signalled to other equipment via the relevant fault outputs.

2 If the impedance monitoring tone is not being received by the amplifier, both the Load Hi and Load Low front LEDs light and the rear Tone Fail light shows.

3 Should either leg of the loudspeaker wiring short to system earth this will also light the Load Hi and Load Low LEDs on the front panel, along with the Earth Fault LED on the rear.

4 Mains power status is also monitored, along with the internal fuses, to give a complete picture of the state of the amplifier.

The load monitoring system also provides an output to drive a ‘hot swap’ automatic amplifier replacement system, via the HSP port, on failure of the amplifier only. Should a load fail short or open circuit but the amplifier is still OK, the hot swap output will not operate. This means that any loudspeakers that can be driven will operate and leaves the hot swap amplifier available for use on another potential failure. The output from each module is presented on a three-way socket and is fully floating. The standard output voltages are 50V and 100V, allowing two modules to be connected in series to give 400W at 100V line. The power supply has a 24 Vd.c. battery input and an onboard battery charger.

Technical Description Amplifier Modules The Aux. and Main line level inputs are de-balanced and pass via level controllers and an analogue switch into a summing amplifier where they are mixed. If the contact input is asserted (470 ohms to ground) a logic circuit disconnects the aux. input. The protect circuit disconnects the output transformer when the voltage rails fall below 22 Volts, exceed 36 Volts, or when a d.c. offset is present on the output rails. The signal then passes through to the output stage, which is a feed-forward current-mode bridge circuit and the output level meter monitors the level at this stage. The output current is passed through the primary of the output transformer and through a low value output-sensing resistor. The output of the transformer is tapped at 50 and 100 Volts. If the 50 Volt taps are connected in series the unit provides a single 400 Watt output at 100 V line. Power Supply A large capacitor reservoir provides a very smooth output, even under large current surges. Two separate internal 10 Amp fused outputs connect to the two amplifier modules. A separate low-current feed passes via the sleep enable selector link into the sleep timer section. Another feed passes, via the Aux. on LED (this shows that the Aux. power is available on the rear connector) through a 3 Amp fuse to the Aux. power connector. With mains voltage operation this unregulated output is at approximately 32 Vd.c. When mains has failed, this output is connected to the battery and therefore operates at battery voltage level. A 27.6 Volt regulator is also taken off this line and used to charge external batteries via a 20 Amp fuse. PSU and amplifier faults are returned into the monitoring circuit from both amplifiers, slugged to prevent false faults being reported externally, and passed to the open collector fault outputs on the SIP port. A fourth open collector output is normally set as OK (normally closed) and opens when any fault occurs.

of 12 DocNo.DCP0001326 ADS 13/09/06 rev8

Block Diagrams Front panel indicators


DISPLAYPSU/CHARGER

P2.200LS OVERALL BLOCK DIAGRAMISSUE 1.

AMP MODULE A

AMP MODULE B

AMP MODULE A

AMP MODULE B

230VAC50/60Hz

~

AUX 27.6VOUT

24V SEALEDLEAD-ACID BATTERY

FAULTS

SHOWS THE OVERALL CONFIGURATION OF PSU AND AMP MODULES PLUS DISPLAY

HOT SWAP PORT B

HOT SWAP PORT A

SIPPORT

P2.200LS PSU MODULE BLOCK DIAGRAMISSUE 1.

5AMPHBC

35A

BATTERY20A20A

27.6 VREGULATOR

3A

AC IN

44000µF 3A

AMP MODULE A

AMP MODULE B

AMP MODULE A

AMP MODULE B

16 SECONDS ON15 MINUTES OFFSLEEP

ENABLE

AUX ON

230VAC50/60Hz

~

AUX 27.6VOUT

MONITOR

GROUNDOKPSU FAULT

DISABLE

DC IN

20A

3A

10A

10A

ALL FUSES AUTOMOTIVE BLADE TYPE, EXCEPT MAINS INLET

FUSE

AMP A FAULT

AMP B FAULT

OK, SIP4PSU FAULT, SIP3

AMP B FAULT, SIP2

AMP A FAULT, SIP1

SLEEP

LINEIN

(AUX)

0dB

LEVEL

P2.200LS AMPLIFIER MODULE BLOCK DIAGRAM. TWO PER P2.200LS ISSUE 1

LINEIN

(MAIN)

0dB

LEVEL

MONITOR

ANALOGUESWITCH

ANALOGUESWITCH

CONTROL50 V

100V

0V

CONTACT(PTT IN)

OPENCIRCUIT

FAULT

SHORTCIRCUITFAULT

DETECT

FAULTHSP2

LOADHIGH

FAULTHSP1

LOADLOW

FAULTHSP4

DETECT

Vp

FAULTHSP3

WINDOW

THRESHOLD

TONEFAIL

DETECTS CURRENT THROUGH RESISTOR

EARTHFAIL

PROTECT

SLEEP IN

-18 -6 -3 0

OUTPUT LEVEL

LOGIC

15VREG Vp out

+24 VinGROUND

+24V IN

OUTPUT

4TH ORDER BANDPASS FILTER @ 22.05KHz

RLA1

RLA1

OK HSP6

HSP5

IF LOAD LOW & TONE FAIL OR PROTECT THEN OK

HSP = HOT SWAP PORT.CAN AVOID HOT SWAP IF NATURE OF FAULT MEANS THERE IS NO POINT

AMP FAULT TO PSU(OPEN CIRCUIT OR SHORT CIRCUIT OR LOAD HIGH OR LOAD LOW OR TONE FAIL OR EARTH FAULT)

Each amplifier’s current status is displayed on the front panel, along with output bar graphs for each channel, and the access status. All indicators are in accordance with BS 5839: Part 4: 1988. Each amplifier module has a separate indication on the front panel for the following states:

Name Function / Description

1 Output level A four-element moving dot display shows the current amplifier output level in logarithmic steps with 0dB being full power.

2 Priority The control contact on the main input is closed.

3 Protect The onboard protection systems have been activated and the load is now isolated.

4 Sleep This facility is not used as it does not comply with BS5839-8

5 Load Hi The load monitoring system has detected an open circuit or higher impedance than was set at commissioning.

6 Load Low The load monitoring system has detected a closed circuit or lower impedance than was set at commissioning.

7 Contact Fault The main input control contact or wiring is either open circuit or short circuit.

8 Tone fail

(Load Hi and Load Low lit)

The amplifier cannot detect the 22 kHz monitoring tone.

The power supply unit also has front panel status indication for the following states:

Name Function / Description

1 AC in The AC mains supply is healthy.

2 DC in The reserve battery supply is in use.

3 PSU Fault The battery charger has detected either a short circuit or high impedance battery.

4 Aux. on The auxiliary power supply for external equipment is available.

5 OK All the functions of the amplifier are normal.


Rear panel controls & features

Name Function/Description Name Function/Description 1 Switch Switches mains power 2 AC Input 6A IEC 3 pin connector

(Fuse: 5A 250V 20mm HBC)

3 Battery Socket

Rear of CliffCon 4 PC/P Pin 1- : GND Pin 1+ : +24V DC @ 20A

8 Hot Swap Port

4 Aux. Power Output

9 Loud-speaker Output

See Output Connections

5 SIP Port See Internal Adjustments (page 9) 10 Level control

Audio level control of adjacent input.

6 Aux. audio input

11 LEDs OC, The main input control wiring is open circuit. SC The main input control wiring is short circuit. E, Earth fault The 100V loudspeaker line has a short to ground. Hi, Load High. Open circuit detected, or a impedance higher than commissioned. TF, Tone Fail The monitor tone on the input signal is not detected. Lo, Load Low. Closed circuit detected or lower impedance than commissioned.

12 Threshold

13 Window

7 Main audio input

Switch: 470R to GND = on 6k8 to GND = off See mix mute settings on page 9

14 Level

Used to set-up the fault monitoring circuitry (see page 6)

1

2

3

4 5

8 9

10 12

13

14

11

6 7


Installation Unpacking On receipt of the amplifier shipment, please inspect for any damage incurred in transit. If damage is found, please notify your supplier and the transport company immediately. State date, nature of damage and whether any damage was present on the shipping container prior to unpacking. Please give the waybill number of the shipping order. This equipment is only suitable for installation in a well ventilated 19 inch equipment rack. Bottom and top ventilation holes must not be blocked and air must be allowed to circulate freely through the internal heatsinks. If several P2.200LSs are installed in one rack, at least one U of rack space must be left between each amplifier. The unit should not be placed in areas;

1 with poor ventilation 2 exposed to direct sunlight 3 with high ambient temperature or adjacent to heat generating equipment 4 with high humidity or dust levels 5 susceptible to vibration

Caution To prevent electric shock do not remove the cover

AC power operation Due to the size and inductance of the power transformer, depending on where in the cycle the power is switched on, the inrush current that is drawn when this device is connected can be as much as 150 Amps! It is therefore essential that mains power is only derived from an automatic soft start device such as SigNET’s SOFT4. Connect the a.c. power cord to any one of the four IEC amplifier power outlets as described in the SOFT4 manual. The unit complies with BS415. AC power cord The wires in the mains lead supplied with the unit are coloured in accordance with the following code.

Green and Yellow Earth

Blue Neutral Brown Live

As the colours of the wires in the mains lead of this unit may not correspond with the coloured markings identifying the terminals in your plug, please connect as follows.

Wire Plug terminal

Green and Yellow ‘E’ mark ‘EARTH’ symbol mark ‘GREEN’ mark ‘GREEN AND YELLOW’ mark

Blue ‘N’ mark ‘BLACK’ mark ‘BLUE’ mark

Brown ‘L’ mark ‘RED’ mark ‘BROWN’ mark

Caution To prevent electric shock do not remove the cover


DC Power Operation and Battery Calculation

The P2.200LS is designed to operate with two 12 Volt VRLA batteries connected in series. BS5839-8 1988 requires that batteries must be capable of operating the system according to the project requirements (normally 24 Hours in a quiescent current state plus 30 minutes in full alarm). It also requires that batteries be sized so as to provide 25% overcapacity to allow for loss of capacity over time. It is also necessary to allow for the current drawn by any ancillary equipment connected to the Auxiliary power output. Auxiliary devices should be connected to different P2.200LS amplifiers in order to spread the load as evenly as is practical.

Quiescent Battery capacity The current drawn in the quiescent state is 75 mA per amplifier module, 150 mA total. The current drawn in the quiescent state with all fault indicators lit is 150 mA per module, 300 mA total. Therefore, for worst case, the power drawn over 24 Hours is 7.2 AHr.

Alarm Condition Battery Capacity It is difficult to predict the exact current drawn in alarm condition so the following approximation is used. Emergency messages consist of a tone, silence, message and silence.

The average power content of speech is approximately 5%. The average power content of a tone is approximately 20% The average power content of silence is nil.

A conservative estimate of current draw is therefore 10% of the peak. The peak current drawn from each amplifier channel is 11 Amps, 22 Amps total. 10% of the peak value is therefore 2.2 Amps or, for 30 minutes, 1.1 AHr. However, batteries must be de-rated by 50% at high discharge rates and so a figure of 2.2 AHr is taken If 60 minutes in alarm is required, 4.4 AHr will be required.

Total Battery Capacity Add alarm state battery capacity to the quiescent capacity and the capacity required is 9.4 AHr Add 1/3 to allow for a 25% loss of capacity over time and the smallest battery that can be used is 12.5 AHr. The smallest standard battery above this size is 18 AHr and 27 AHr gives even more spare capacity.

Additional battery capacity for ancillary equipment Add the capacity required for any ancillary equipment, plus one third for battery aging. These figures do not change in an alarm condition. Worst case quiescent current drawn at 24V d.c. SS2N = 75 mA = 1.84 AHr + 1/3 = 2.44 AHr Psiren = 50 mA = 1.23 AHr + 1/3 = 1.63 AHr FCB = 50 mA = 1.23 AHr + 1/3 = 1.63AHr Integrity Mainframe = 300 mA = 7.35 AHr + 1/3 = 9.78 AHr MP2 = 50 mA = 1.23 AHr + 1/3 = 1.60 AHr MPP panel (any) = 150 mA (all LEDs lit) = 3.68 AHr + 1/3 = 4.89 AHr Batteries must be connected via a suitable fuse. We recommend DIN mounted cartridge fuse holders ref RS371-0340 and 20A RS230-3496 cartridge fuses.

Correct Power-up Sequence Plug in mains connector Make sure external battery fuse is out of circuit Connect battery connector to amplifier Switch on mains Connect battery fuse Power-related fault indicators should extinguish If the batteries are connected before the mains supply is turned on the inrush current will weaken the internal battery fuse.


Fault Monitoring

PTT monitoring The contact input (PTT in) is monitored by a resistive potential divider as shown below;

6K8 470R

1K

27V6DC

0V

PTT InputThe terminal voltage here definesthe status of the PTT line:-Open circuit faultOKTriggerShort circuit fault

PTT Switch

The current drawn by the 6K8Ω resistor (in the previously connected unit) proves that the PTT line is intact. Open and short circuit faults are separately detected and operation of the PTT is detected by the change in voltage level at the PTT input when the 470Ω is switched in.

Amplifier and Loudspeaker Circuit Monitoring To monitor the amplifier and loudspeaker system, the voltage across the output sensing resistor is measured and taken through a fourth order bandpass filter @ 22.05 kHz to a comparator which detects the power being drawn at the monitoring tone frequency. The tone is injected into the amplifiers’ input from the previous device in the chain (matrix). The output from the comparator passes into a detector circuit, which compares its value with the threshold set at installation. It also detects the absence of the tone and reports this to the tone fail output. The output from the detector passes to a comparator, which drives the load high output. A window control between that comparator and a second device connected to the load low output is used to adjust how much the impedance can vary before a fault is flagged.

Loudspeaker Circuits An end of line detection unit is supplied for each circuit (two per dual amplifier module). These must be fitted at the end of each loudspeaker line so that the line can be monitored in accordance with BS5839 part 8, which requires that loudspeaker line continuity be monitored, not the loudspeakers themselves.

Loudspeaker Spurs Note that this implies that spurs are not allowed. If a loudspeaker output is to be split to drive two circuits this is only possible using the SPLIT100 Line Splitter, which protects either circuit against a short circuit in the other circuit. The SPLIT100 is provided with one EOL device so that one EOL can be used at the end of each circuit. If the circuit is split more than once, it is not possible to detect circuit faults reliably and so this is not allowed. A detector circuit connected to the 50 Volt output transformer tap monitors the current flowing and any imbalance must be due to a short to system earth so an earth fault is detected. The load high, load low, earth fault and tone fail outputs are brought out separately (un-slugged) on the HSP port. Fault ports There are three fault output ports; the SIP port, and two Hot Swap ports. The SIP port is slugged to prevent false faults being passed on to the system and provides four open collector outputs; Amp A fail, Amp B fail, and PSU fail (normally open) plus OK (normally closed). These normally connect to pins 1 to 4 of the SIP port via an internal dual in-line header with four shorting links fitted. This header can be reversed to bring the faults out on pins 5 to 8 instead. This allows faults from two dual amps to be fed down a piece of flat ribbon cable to an SS2N. The Hot Swap ports are not slugged so need to be gated with the SIP port to prevent false faults. They are provided to allow detailed amplifier fault information thus; Earth Fault, Tone In Fail, Load Low, Load High, plus an open collector output that only conducts if the fault is not Load Low or Tone Fail to prevent unnecessary amplifier swapping. A common fault output is also provided which is triggered by any or all of the six fault conditions already described.


Input connections Connecting the P2.200 to a SigNET iX LS (prioritised mixer) including battery backup.

Important Note: When replacing P2.200 amplifiers on site it must be ensured that the iX LS model uses a 22Khz monitoring tone. This will be shown by a sticker on the unit. iX LS units without a sticker must be replaced with 22Khz units. (Older iX LS units use a 20 Khz monitoring tone).

End of line units (supplied with the amplifier) must also be fitted.

Connecting the P2.200 to a SigNET SS2n (Network station), including battery backup.

1. SS2n feeding both amplifier modules 2. SS2n feeding only one amplifier module

Connecting the P2.200 to an Integrity Mainframe.



The amplifier may be used in conjunction with 100 Volt constant voltage loudspeaker systems. This technique is ideal in public address applications where it is necessary to operate loudspeakers over a distance from the amplifier as it prevents excessive line losses. Line matching transformers

must be installed at each loudspeaker to match them to the amplifier. Low ohm speakers will sound distorted.

Output connections Output socket

This is similar in principle to mains electricity distribution where power is transformed to high voltages and sent long distances over small conductors before being transformed down again at its destination(s). These constant voltage outputs are most convenient for distribution of power when a number of speakers are installed. Each loudspeaker must have a 100 Volt line transformer with a tap that gives the power desired for that loudspeaker. The total number of power settings for all speakers should be equal to the amplifier power rating or less. See the following diagrams.

100 Volt connection (200 Watt) 100 Volt connection (400 Watt)

Operation and Set-up

Once an amplifier is installed and powered up, it is necessary to adjust or verify the following settings: 1. Ensure that an audio lead from a SigNET routing matrix is connected to both Main Inputs a. 2. Check that the monitoring tone is not disabled (the tone fail (TF) indicator is not lit). 3. No audio should be routed into the Main input except for the 22 kHz monitoring tone 4. Using an oscilloscope (e.g. Maplin Part No.IN02158) or true r.m.s voltmeter (RS218-0265) capable of

reading up to 25 kHz, connect to each 100V line output across 0V + 100V. Adjust the main level control to give a reading of 6 Volts Peak to peak (2.12 Volts r.m.s) NB Default factory setting is 0V (off), other than on full System deliveries.

5. Once set, this level control must not be adjusted again – all level adjustments must be carried out by altering the levels from the source equipment (matrix).

Set-up the load monitoring circuit is as follows; 6. Turn the Threshold and Windows controls to minimum (anticlockwise). Ensure load and End of line

(EOL) unit are connected. If loudspeaker splitters are used there must be an end of line unit on each spur. If more than two end of line units are fitted, the monitoring system will not operate reliably.

7. Turn up the threshold control clockwise until the Load Hi and Load low LED’s are just toggling. 8. Open window control fully (clockwise). 9. Remove the EOL unit. Load Hi should come, and remain on. 10. Refit EOL, Load Hi LED should extinguish.

Note Loudspeaker runs of more than 400m are not recommended, as faults cannot be reliably detected.

Internal Adjustments

These adjustments should only be carried out by qualified personnel. The power lead and battery supply must be disconnected before the top cover is removed. The following adjustments involve removal of the top cover of the unit, remove the side and top screws then lift lid off.

Mix / Mute (one per amp module) Mix (Default) Used in life safety applications to allow the high frequency monitoring tone to pass. When

the Main input is not in use, the Main and Aux. inputs are mixed together (this gives the monitor tone a path through the amp preventing monitor tone faults).

Mute Switch open (pin1 of main input) Main input is muted. Aux. input is accessed Switch closed (pin1 of main input) Main input is accessed. Aux. input is muted PSU Monitor Enabled (default) Battery monitoring enabled. Disabled Battery monitoring disabled, this removes the battery fault from the front panel if batteries

are not fitted. Sleep Mode Disabled (default) This facility is not used as it does not comply with BS5839-8

All other jumpers on the unit are all for SigNET’s internal use / test purposes only. SIP port These four fault outputs pass via a 16-pin dual in line socket containing a rewireable header to the top eight pins of the SIP connector. By default these are connected via wire links to pins 1 to 4 this used by SigNET to designate a node A amplifier. With the header-reversed pins 5 to 8 are connected. This configuration is used by SigNET to designate a node B amplifier. The header can be rewired to allow any combination of the eight pins for custom wiring.

Node A amplifier (default) (diagram shows male connector on back of amplifier)

Node B amplifier (with header reversed) (diagram shows male connector on back of amplifier)


Specification

Amplifier Performance Specification Sensitivity Impedance CMRR Switch input Output power Frequency Response THD SINAD Regulation Output voltage Operational mode Protection Standby current Full load current

0dB for both Main and Aux. Inputs 10K balanced (Main and Aux.) better than 60dB 470Ω to GND = on 6k8Ω to GND = off 200W Continuous average power 30Hz to 20kHz -3dB +0dB better than 0.1% , 1kHz better than -80dB better than 2dB 100V line Current mode, feed forward system Over voltage, under voltage, d.c. offset, short circuit, thermal and safe operating area 75mA (150mA with fault lights lit and full load monitoring) 11A

Physical Material Colour Width Height Depth Weight

18swg Zintec sheet steel Black (RAL 9500 semi-gloss) 430mm 88mm 315mm (behind front panel) 17kg

Power supply & charger AC input DC input Charging voltage Charging current Monitoring Aux. Supply SIP Port

230 VAC +/- 20% 22 to 34 V DC 27.6 V DC 3A Short circuit and battery high impedance 1A User assignable faults for the SigNET network

Monitoring Detection frequency Detection type Window Sensitivity End of Line units, one required per channel.

22.05kHz Window comparator system 5% to 20% user adjustable -40dB to -10dB, user adjustable

0.047μF in series with 100Ώ RS365-7227

Fuses Mains Inlet Internal Automotive Blade

Amp feeds Battery Charger Aux.

5A 250V 20mm HBC 10A x 2 20A x 1 3A x 1 3A x 1


PSU pcb showing internal fuse locations

Fuses are commonly available automotive blade types

SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT PRIOR NOTICE

SigNET (AC) Limited

6 Tower Road Glover Estate, Washington, Tyne & Wear, NE37 2SH Tel: +44 (0)191 417 4551

Fax: +44 (0)191 417 0634 [email protected]


mailto:[email protected]

http://www.signet-ac.com/

operation instruction manual pulse 2.200 ls dual...

Documents