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Wiring

5-17

Distributed I/O Device ET 200M

EWA-4NEB780600602-06

5.2.3 Wiring the Front Connectors of the Signal Modules

S7 Explosion-Proof Modules

You can find out how to wire the S7 explosion-proof modules and what to look out

for when wiring modules in an intrinsically safe area in the Intrinsically Safe I/O

Modules Reference Manual.

Cables

You can use flexible cables with cross-sections as in Table 5-3 on page 5-14.

You do not need wire end ferrules. If you use wire end ferrules, only use those

listed in Table 5-3 on page 5-14.

Types of Front Connector

There are two types of 20-pin and 40-pin front connectors: spring terminals and

screw-type terminals.

You can find the order numbers in Appendix A.

Spring Terminals

To wire the front connector using spring terminals, simply insert the screwdriver

vertically into the opening with the red opening mechanism, put the cable into the

correct terminal, and remove the screwdriver.

Tip: There is a separate opening for test probes up to 2 mm in diameter to the left

of the opening for the screwdriver.

Wiring for Module Change During Operation

If you wire modules for an ET 200M with the ”module change during operation”

function, you will require longer cables to the front connectors in order to easily

insert and remove the modules during ET 200M operation. We recommend you

make the wiring to the front connector approx. 20 cm longer.

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