Assignment planning
3.6 Configuring the electrical structure
ET 200M
Operating Instructions, 12/2008, EWA-4NEB780600602-08
51
Properties of load power supplies
The load power supply supplies input and output circuits (load circuits) as well as sensors
and actuators. The following lists the properties of load power supplies that are required in
special application cases.
Properties of load power supply required for ...
Remarks
Modules that must be supplied
with voltages ≤ DC 60 V or
≤ AC 25 V
Safer (electrical) isolation
24 V DC load power supply
The power supplies PS 307 as
well as the Siemens load power
supplies of the 6EP1 series
have this property.
Tolerances of the output
voltage:
20.4 V to 28.8 V
24 V DC load power supply
40.8 V to 57.6 V
48 V DC load power supply
51 V to 72 V
60 V DC load power supply
In the case of considerable
unevenness of the output
voltage, we recommend using a
supporting capacitor.
Measurement: 200 µF per 1 A
load current (with bridge
rectification).
Rule: ground the load circuits
The load circuits should be grounded.
A perfect functioning security is given on account of the mutual reference potential (ground).
On the load power supply (terminals L or M) or on the isolation transformer provide a
disconnectable connection to the grounding wire (position ④ in the following figure). In the
event of faults in the energy distribution, this measure makes it easier for you to localize
contacts to earth.
Summary of Contents for IM 153-4 PN
Page 186: ...Functions 8 9 SNMP ET 200M 184 Operating Instructions 12 2008 EWA 4NEB780600602 08 ...
Page 254: ...Order Numbers for the ET 200M ET 200M 252 Operating Instructions 12 2008 EWA 4NEB780600602 08 ...
Page 268: ...Glossary ET 200M 266 Operating Instructions 12 2008 EWA 4NEB780600602 08 ...