Wiring
4-32
ET 200X Distributed I/O Device
EWA 4NEB 780601602-06
4.4.6
Connecting a protective ground to expansion modules with
analog inputs and outputs
Grounding expansion modules with AI/IO
To ensure the ET 200X remains operative even when subject to interference
(especially RF coupling in accordance with ENV 50141), you must ground every
expansion module with analog inputs or outputs separately.
Connection to
protective ground
You must connect the protective ground to the expansion module. A grounding
screw is provided on the expansion module for this purpose. You either connect
the protective ground to the PE screw of the basic module (see Section 4.4.5) or
directly to protective ground. Minimum cross-section from the conductor to the
protective ground: 4 mm
2
.
Note
Make sure that the protective ground has a low impedance (Figure 4-18).
Figure4-18 shows you how to connect the protective earth to the analog module.
The M5 fixing screw is attached to the analog module such that it cannot get lost.
Figure 4-18
Connecting the protective ground to the analog module
EMC
You will find additional notes on EMC installation and wiring in the manual for the
DP master you are using or for the host system.
Summary of Contents for SIMATIC ET 200X
Page 8: ...Preface viii ET 200X Distributed I O Device EWA 4NEB 780601602 06 ...
Page 20: ...Contents xx ET 200X Distributed I O Device EWA 4NEB 780601602 06 ...
Page 40: ...Product Overview 1 20 ET 200X Distributed I O Device EWA 4NEB 780601602 06 ...
Page 58: ...Configuration Options 2 18 ET 200X Distributed I O Device EWA 4NEB 780601602 06 ...
Page 80: ...Installation 3 22 ET 200X Distributed I O Device EWA 4NEB 780601602 06 ...
Page 124: ...Configuration Options 2 18 ET 200X Distributed I O Device EWA 4NEB 780601602 06 ...
Page 328: ...Order Numbers A 10 ET 200X Distributed I O Device EWA 4NEB 780601602 06 ...
Page 348: ...Dimesioned Drawings and Pinouts C 18 ET 200X Distributed I O Device EWA 4NEB 780601602 06 ...
Page 362: ...Index Index 8 ET 200X Distributed I O Device EWA 4NEB 780601602 06 ...