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18

A+B

A+B

B

I/O extension module

Power supply card

Power supply card

Connection diagrams

Motherboard

Motherboard

Motherboard

Potential equalisation

Potential equalisation

Potential equalisation

TZR 190 - Ex

TZI 192 - Ex

TZI 191 - Ex

I

K

Z - 175911 EN

Intrinsically safe inputs EEx ib IIC/IIB

Fig. 19-3 Connection diagram of 19" plug-in card with intrinsically safe inputs via safety

barriers for A 1 x Pt 100 direct, 2 x mA Commentary“ No. 95-04-205-Ex)

B 1 x Pt 100 direct, 3 x mA

(see „Expert

Notes The safety barrier TZR 190-Ex is connected to either the motherboard or the I/O extension card. The user has to provide connectors for linking the safety barriers and plug-in card.

C

C+D

D

Power supply card

Power supply card

Power supply card

.

Motherboard

Motherboard

Motherboard

Potential equalisation

Potential equalisation

Potential equalisation

TZI 192 - Ex

TZI 192 - Ex

TZI 191 - Ex

Z - 175912 EN

Intrinsically safe inputs EEx ib IIC/IIB

Fig. 19-4 Connection diagram of 19" plug-in card with intrinsically safe inputs via safety bar-

riers for C 4 x mA

D 3 x mA

(see „Expert Commentary“ No. 95-04-205-Ex)

Note The user has to provide connectors for linking the safety barriers and plug-in card.

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