Siemens SIMATIC ET 200S Manuel - Page 19

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Connecting

5.1

Introduction

This chapter describes the factors to consider when connecting the analog outputs.

Cables for analog signals

You should use shielded and twisted-pair cables for the analog signals. This reduces the

effect of interference. You should ground the shield of the analog cables at both ends. If

there are differences in potential between the cable ends, an equipotential bonding current

that may interfere with the analog signals will flow across the shield. In this case, you should

only ground the shield at one end of the cable.

Analog output modules

In the case of the analog output modules there is generally galvanic isolation

● Between logic and backplane bus.

● Between the load voltage and M

2AO I ST analog electronic module (6ES7135-4GB01-0AB0)

Manual, 04/2007, A5E01076949-01

ANA.