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20

Connection diagrams

Intrinsically-safe inputs EEx ib IIC/IIB

Motherboard

I/O extension module

Power supply card

1

2

3

4

5

6

7

8

9

10 11

12 13

14 15

16 17

18 19 20

24V 21 22 23 24

25 26

27 28

29

30

31

32 33

34

35 36 37 38 39

40 41

A2

42 43

GW2

AX1

AX2 EBX3

ABX3

RS 4851)

24V

RL

44 45 46

47 48 49

50 51

52 53

54 55 56

PA

A1

GW1 ENI

EBX2 ABX2 RL

Potential equalisation

57 58

59 60

61

62 63 64

65 66 67 68 69

70 71

72 73

24V 74 75 76 77 78 79 80 81 82 83 84

1

2

IK

AB1

ERR

EBX1 ABX1 RL

24 V DC

external

PE 0 N

L1

Z - 17701 EN

Fig. 19-7 Connection diagram of field case with intrinsically safe inputs (see „Expert Com- mentary“ No. 95-04-205-Ex)

1) RS 485 as alternative to GW2: 16 = TxD/RxD-P, 17 = TxD/RxD-N, 18 = reference poten- tial Note For units without I/O extension card, terminals 19-26, 47-54 and 75-84 are not occu- pied.

Legends for Figs. 8-1 to 8-7 Motherboard

A1, A2 AB1 E1...E6 (En) EB1...EB4 ENI ERR GW1, GW2 I K

Analog outputs (mA, V) Binary outputs (5 V) Analog inputs (mA, V, ê, Pt 100) Binary inputs (5 V, 24 V) Binary inputs (approx. 10 V), e.g. NAMUR transmitter Fault signal output (24 V, open collector) Alarm signalling unit outputs (24 V, open collector) Constant current source for Pt 100 System zero

I/O extensions card

KX ABXa, ABXb ABX1...ABX3 AX1, AX2 EBXa, EBXb EBX1...EBX3 EX1, EX2 (En) I

Binary outputs (5 V, active) Binary outputs (24 V, active) Analog outputs (mA) Binary inputs (5 V) Binary inputs (24 V) Analog inputs (mA, V, Pt 100) Constant current source for Pt 100 System zero

Mains card

KS L1/+, N/0 PE US1...US4

Control loop Power supply Protective conductor Supply voltage for two-wire transmitter System zero

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