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F 6221 (0805)

All rights reserved. Equipment subject to change without notice: 1HIMA Paul Hildebrandt GmbH + Co KG, P.O. Box 1261, 68777 Brühl

F 6221

F 6221: 8-channel analog input module (Ex)i,

safety-related• 8 monitoring channels for checking the transmitter supply voltage 0...30 V

• Current inputs 0/4...20 mA, Voltage inputs 0...1 V

• EC Type Examination Certificate (ATEX): EX5 02 04 19183 036

• Safety-related, applicable up to SIL 3 according to IEC 61508

1 Overview

Figure 1: Block diagram and front cable plug

Appertaining function block: HF-AIX-3

Ex-category II (1) GD [EEx ia] IIC

Electric strength 375 V Ex-circuit against non Ex-circuit

7 V Ex-circuit against Ex-circuitNoise suppression >60 dB (common mode 50/60 Hz)

Block diagram

Frontcable plug

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Operating data 5 V, 125 mA

24 V, 300 mA

Space requirement 4 SU

Nominal input voltage 0 to 1.00 V

Nominal input current 0 to 20.0 mA (via shunt)

Range of use of voltage -0.1 V to 1.1 V

Range of use of current -2 mA to 22 mAR*: Shunt for current measuring 50 Ω, T < 10 ppm/K

tolerance 0.05 %

part number: 00 0710490

Resolution 1 V = 10,000 parts20 mA = 10,000 parts

Updating interval of measuring values < 80 ms

Input resistance min. 1 MΩ

Time constant of input filter ca. 7 ms

Converting time max.1.8 ms for one channel

Maximum error 0.1 % at 25 °C

Max. variation factor due to temperature 0.1 % / 10 K

Max. temperature variation 0.2 % at -10 °C...+70 °C

Safety-related variation limit 1 %

Electric strength of inputs 5 V

Maximum current via shunt 80 mA

Transmitter supply voltage monitoring for channels 1 to 8

Input voltage max. 30 V

Switch-off limit < 16.0 V

Input resistance min. 30 kΩ

Electric strength of inputs 30 V

The module must only be operated with forced ventilation (fan).The fan (K 9203) must be installed above the subrack where theF 6221 module is plugged in.If the F 6221 module is operated in an H 41q, the fan (K 9212) must beinstalled directly under the F 6221 module.In order to ensure the forced ventilation, the air deflector panel M 7201(1 HE) must to be mounted over the fan (K 9203) or over the kit H 41q.The air deflector panel M 7201 deflects the warm air to the rear, inorder to avoid a temperature rise of the subracks and modules whichare mounted above.

Note The block diagram of F 6221 shows the wiring with the supply moduleF 3325. In this wiring variant, the first six channels of the F 3325 mod-ule are used for passive transmitters. The channels 7 and 8 are usedfor active transmitters (see Variant A1 and A2).The pins d4 and d30 on the front socket of the F 6221 are omitted(coding of the front plug).

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2 Application

The field of application of the F 6221 module is the operation with current transmitters (0/4 to20 mA) which can be supplied via the intrinsically safe supply unit F 3325. For safety reasons,the supply voltage of the transmitters is monitored.

The F 6221 module contains the measuring device. It can be used to measure up to eight sig-nal inputs (I1 to I8). For monitoring the transmitter supply voltages, another eight signal inputs(TC1 to TC8) are available. These signal inputs only monitor the switch-off limit and are notavailable to the user program as measuring values.

The signal inputs "I" and "TC" are related to each other (I1 to TC1, I2 to TC2 etc.).

There are some wiring variants for different applications available, for which HIMA supplies thecorresponding cables.

2.1 Wiring variants

2.1.1 Permissible wiring variants with two-wire passive transmitters

*) according to the technical report, No. 70013102.4 (/.1/.2)

Table 1: Permissible wiring variants with two-wire passive transmitters

Only the wiring variants described in the data sheets for F 3325 andF 6221 are permissible. All other ways of wiring are prohibited!

For the described wiring variants only the provided HIMA cables areadmissible.

HIMA

variantsVariants*) Description

A1 1 Mono supply, mono current measuring,wiring via cable

B 1 Mono supply, mono current measuring,wiring via terminal

C1 3 Mono supply, redundant current measuring,wiring via cable

D 3 Mono supply, redundant current measuring,wiring via terminal

Note The other TÜV variants described in the technical report are only for theoretical considerations.

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2.1.2 Permissible wiring variants with active transmitters / sources

HIMA

variantsDescription

A2 No supply, mono current measuring

C2 No supply, redundant current measuring,

wiring via cableE Voltage measuring

F Current measuring via shunt

Table 2: Permissible wiring variants with active transmitters / sources

These wiring variants must be carried out in compliance with the rele-vant Ex standards. For the interconnection of intrinsically safe opera-tional equipment, the PTB-ThEx-10 and the operating instructions for the F 6221 have to be considered.

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2.1.3 Variant A1: Mono supply, mono current measuring, wiring via cable

• Mono operation with transmitter supply for channels 1 to 6

• For channels 7 and 8 see note below

• Cable type: Z 7063/6221/ExCn/ITI + Z 7025/3325/ExCxpart number 93 6221 101

Figure 2: Mono supply, mono current measuring, wiring via cable

Note In this wiring variant, the first six channels of the F 3325 module arealways used for passive transmitters. Channels 7 and 8 are used for active transmitters (see Variant A2).

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2.1.4 Variant A2: No supply, mono current measuring

• Mono operation without transmitter supply for channels 7 and 8

• Cable type: Z 7063/6221/ExCn/I part number 93 6221 105

Figure 3: No supply, mono current measuring

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2.1.5 Variant B: Mono supply, mono current measuring, wiring via terminal

Figure 4: Mono supply, mono current measuring, wiring via terminal

• Mono operation with transmitter supply for channels 1 to 8


Z 7025/3325/ExCn part number 93 3325 101

Note Instead of the F 3325 module, a galvanically isolated power supplycan be used in this wiring variant. It has to be considered that a fault

current runs through the monitoring inputs (TC1 to TC8, Re = 30 kΩ)which affects the non-intrinsically safe side of the galvanically isolatedpower supply and must be compensated. The Hart protocol can alsobe transmitted if suitable transmitters are used.

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2.1.6 Variant C1: Mono supply, redundant current measuring, wiring via cable

• Redundant operation with transmitter supply for channels 1 to 6

• For channels 7 and 8 see note below

• Cable type: Z 7063/6221/ExCn/ITI/R2 part number 93 6221 103

Figure 5: Mono supply, redundant current measuring, wiring via cable

Note In this wiring variant, the first six channels of the F 3325 module arealways used for passive transmitters. Channels 7 and 8 are used for active transmitters (see Variant C2).

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2.1.7 Variant C2: No supply, redundant current measuring, wiring via cable

• Redundant operation without transmitter supply for channels 7 and 8

• Cable type: Z 7063/6221/ExCn/ITI/R2 part number 93 6221 103

Figure 6: No supply, redundant current measuring, wiring via cable

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2.1.8 Variant D: Mono supply, redundant current measuring, wiring via termi-

nal

Figure 7: Mono supply, redundant current measuring, wiring via terminal

• Redundant operation with transmitter supply for channels 1 to 8

• Cable type: 2x Z 7063/6221/ExCn/U1V part no. 93 6221 100

1x Z 7025/3325/ExCn part no. 93 3325 101

Note Instead of the F3325 module, a galvanically isolated power supply canalso be used in this wiring variant. It has to be considered that a faultcurrent runs through the monitoring inputs (TC1 to TC8, Re = 15 kΩ)which affects the non-intrinsically safe side of the galvanically isolatedpower supply and must be compensated. The Hart protocol can alsobe transmitted if suitable transmitters are used.

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2.1.9 Variant E: Voltage measuring

• Voltage measuring for signals (I1 to I8) and supply voltage monitoring (TC1 to TC8) for channels 1 to 8

• Cable type: Z 7063/6221/ExCn/U1V part number 93 6221 100

Figure 8: Voltage measuring

2.1.10 Variant F: Current measuring via shunt

• Current measuring for signals (I1 to I8) and supply voltage measuring (TC1 to TC8) for channels 1 to 8


Figure 9: Current measuring via shunt

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3 Pin allocation (in the field)

Channel 7 and 8 have no supply

• Cable type: Z 7063/6221/ExCn/ITI +Z 7025/3325/ExCx

part no. 93 6221 101

Z 7063/6221/ExCn/ITI/R2 part no. 93 6221 103

Note The grounds (I1- to I8-) on the module are taken together to oneground (I-). The signals (I1- to I8-) may only be interconnected on themodule.No external joints are allowed.

In Ex applications, the cable shield has to be connected to the equipo-tential bonding. In non Ex applications, the cable shield is connectedto the PE terminal / bus bar on the subrack.

Channel Connection Color

I1+

TC1+

z2

z18

WH

BN

I2+

TC2+

z4

z20

GN

YE

I3+

TC3+

z6

z22

GY

PK

I4+

TC4+

z8

z24

BU

RD

I5+

TC5+

z10

z26

BK

VT

I6+

TC6+

z12

z28

GY-PK

RD-BU

I7+

I7-

z14

d14

WH-GN

BN-GN

I8+

I8-

z16

d16

WH-YE

YE-BN

Cable screen YEGN

CableLiYCY8x2 x 0.2 mm2

screened

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• Cable type: Z 7063/6221/ExCn/U1V part no. 93 6221 100

Z 7063/6221/ExCn/I part no. 93 6221 105

Note The grounds (I1- to I8-) are joined to a common ground (I-). The sig-nals (I1- to I8-) may only be interconnected on the module. No external

joints are allowed.The pins d4 and d30 on the front socket of the F 6221 are omitted(coding of the front plug). Pin allocations refer to the connections onthe printed circuit board in the front plug.

In Ex applications, the cable shield has to be connected to the equipo-tential bonding. In non Ex applications, the cable shield is connectedto the PE terminal / bus bar on the subrack.


I1+

I1-

z2

d2

WH

BN

I2+

I2-

z4

d4

GN

YE

I3+

I3-

z6

d6

GY

PK

I4+

I4-

z8

d8

BU

RD

I5+

I5-

z10

d10

BK

VT

I6+

I6-

z12

d12

GY-PK

RD-BU

I7+

I7-

z14

d14

WH-GN

BN-GN

I8+

I8-

z16

d16

WH-YE

YE-BN

Cable screen YEGN


TC1+

I1-

z18

d2

WH-GY

GY-BN

TC2+

I2-

z20

d4

WH-PK

PK-BN

TC3+

I3-

z22

d6

WH-BU

BN-BU

TC4+

I4-

z24

d8

WH-RD

BN-RD

TC5+

I5-

z26

d10

WH-BK

BN-BK

TC6+

I6-

z28

d12

GY-GN

YE-GY

TC7+

I7-

z30

d14

PK-GN

YE-PK

TC8+

I8-

z32

d16

GN-BU

YE-BU

Cable screen YEGN

CableLiYCY16x2 x 0.2 mm2

screened

Channels (I1+ to I8+) for input signal measuring

Channels (TC1+ to TC8+) for supply voltage monitoring

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4 Operating Instructions for F 6221

4.1 Application

The module is used to measure the current of 0/4 to 20 mA transmitters. These transmitterscan be installed in potentially hazardous atmospheres from Zone 1 on.

The digitized process signals are made available at the outputs.

4.2 Electrical specifications concerning intrinsic safety

For these specifications please refer to the EC prototype test certificate enclosed.

4.3 Assembly and installation

The module is mounted in a 19” subrack. It must be plugged in vertically. The design of thesubrack must allow heat dissipation.

Further information for assembly and installation see HIMA main catalog "The H41q and H51qSystem Families".

The module is connected to the intrinsically safe field circuits via the cable plug Z 7063.

In addition, the following points should be considered:

• The electronic module including its connections has to be installed in a way that at leastthe degree of protection IP 20 according to EN 60529: 1991 + A1: 2000 is achieved.

• Two intrinsically safe input circuits of two F 6221 modules or several intrinsically safeinputs of one F 6221 module as well as one Ex supply unit for the transmitter can bewired in parallel. The maximum values (U0,I0,C0,L0) reduced due to this method of con-

nection have to be considered (interconnection according to PTB-ThEx-10). A technicalreport on the interconnection of the F 6221 and F 3325 modules with two-wire transmit-ters is available from HIMA on request.

• The separation between intrinsically safe and not intrinsically safe terminals must be≥ 50 mm, especially between adjacent modules.

• The separation between adjacent intrinsically safe terminals must be ≥ 6 mm.

• Intrinsically safe and not intrinsically safe lines must be installed separately, or theintrinsically safe lines must be provided with additional insulation.

• Intrinsically safe lines must be identifiable, e.g. by the light blue color (RAL 5015) of theinsulation.

• The wiring has to be secured mechanically in a way which ensures that in the event of an accidental disconnection, the distance (EN 50 020/ Part 7, Table 4) between theintrinsically safe and not intrinsically safe connections does not fall below the requiredminimum (e.g. by bundling).

• The line shield has to be connected to equipotential bonding.

No external voltage must be applied at the outputs.Only these applications are permissible, which are described in thedata sheets for F 3325 and F 6221.

Note The module must not be mounted within a potentially explosive area.

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• Modules, which were operated in general electrical systems, may not be used thereaf-ter no more in Ex-plants.

The lines used must comply with the following insulation test voltages:

• Intrinsically safe lines ≥ 1000 VAC

• Not intrinsically safe lines ≥ 1500 VAC

Stranded wires, the line ends must be provided with wire end ferrules.The terminals must be suitable for clamping the wire cross section.

The applicable regulations and standards have to be complied with, especially:

• DIN EN 60079-14: 1997 (VDE 0165, Part 1: 1998)

• EN 50 014: 1999 (VDE 0170/0171 Part 1: 2000)

• EN 50 020: 1994 (VDE 0170/0171 Part 7: 1996)

4.4 Connection of unused inputs

Any voltage inputs 0...1 V which are not used have to be short-circuited at the terminal strip.Unused current inputs are terminated with the shunt in the cable plug.Inputs, which are not terminated, are not reported as "faulty" (e.g. un-plugged cable).

4.5 Requirements for the supply

The internal resistance of supply must not exceed 500 Ω. Otherwise internal errors of the mod-ule can not be detected.

4.6 Redundant connection

When the inputs are connected redundantly, an error at one input may generate a measuringerror at the redundant faultless input. The measuring error can be up to 2.5% when the inputis terminated with a 50 Ω resistor.Due to the voltage drop on the line connecting the redundant modules, the cable length is lim-ited to 2 m.

4.7 External transmitter connection (variants D,E)

The line between the F 6221 module and the assigned measuring shunts (channels 1 to 8) canhave a maximum length of 10 m.

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4.8 Maximum cable length and load in the transmitter circuit

The maximum additional load Rb in the transmitter circuit is calculated as follows:

Rb additional loadUTC switch-off limit for the transmitter supply voltage monitoring

UTmin minimum supply voltage of the transmitter Imax maximum current to be measured

The contact resistances of the clamps must be considered. When planning the Ex circuits theline inductance and the line capacitance for the respective line length have to be considered.

The cable to the transmitter must be shielded twisted-pair.

4.9 Start-upBefore the first system start-up, an Ex-expert has to check whether the system has been cor-rectly installed, especially the supply voltage connections and the connections of the intrinsi-cally safe circuits.

4.10 Maintenance

In case of a failure, the defective module must be replaced with the same type or with another approved type. Any repair work must only be carried out by the manufacturer.

4.11 Project planning in ELOP II

• Each input channel is configured via the HF-AIX-3 software function block. The trans-mitter supply voltage monitoring must be enabled in the software function block.

• The parameterization of the module must be performed according to the operatingsystem manual for the currently used version of the operating system. Especially thechapter about the noise blanking has to be regarded.Setting: Safety time ≥ 3 x watchdog time.

• The channel error bit must be evaluated in the user programs in a way which leads tosafety-related beha-vior of the corresponding input channel.

• For resetting a channel error, the recalibration input of the HF-AIX-3 software functionblock must be set to TRUE twice for at least one PLC cycle.

Spreading the measuring values (this can be configured in the HF-AIX-3 software functionblock) will result in an increase of the relative error by the spreading factor.

Max. transmitter supply

voltage UTmin

Max. length of line

at 0.2 mm²

Max. length of line

at 0.5 mm²

14.5 V 135 m 312 m

14 V 271 m 625 m

13.5 V 407 m 937 m

13 V 543 m 1250 m

12.5 V 679 m 1562 m

12 V 815 m 1875 m

11.5 V 951 m 2187 m

Table 3: Max. cable length and load in the transmitter circuit

RbU TC UT mi n – ( )

I max( )------------------------------------( ) 50( ) – Ω

16V 14V –

20mA-------------------------- 50Ω – 50Ω= = =

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