Configuration Options
3-4
Distributed I/O System ET 200S
EWA 4NEB 780 6024-02 07
AUX(iliary) Bus (AUX 1)
A TM-P terminal module (for a power module) allows you to connect additional
potential (up to the maximum rated load voltage of the module), which you can
apply by means of the AUX(iliary) bus. You can set the AUX(iliary) bus individually
as:
A protective ground bar
Additionally required voltage
Placement and Connection to Common Potential of Power Modules
Interface module
Termination
Power module
EM
EM
Power module
EM
EM
Power module
EM
EM
EM
EM
EM
Potential group 1 Potential group 2 Potential group 3
Supply voltage 1
Supply voltage 2 Supply voltage 3
Protective conductor
Additionally re-
quired voltage
P1/ P2 power buses
AUX1 bus
Figure 3-1 Placement and Connection to Common Potential of Power Modules
!
Warning
If you connect the AUX1 bus to common potential independently of the P1/P2
buses (different voltages), there is no safe electrical isolation between the AUX1
bus and the P1/P2 buses.
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