Dc Power Supply - Siemens SIMATIC RF1100 Operating Instructions Manual

5.2 24 V DC power supply
The connection of an external power supply (24 V DC) and the connection with functional earth
(FE) take place via a connector with 3 pins. The following wiring diagram helps you to allocate
the pins of the connector.
L+
M
FE
Figure 5-3
Connect the respective cables to the corresponding connector pins and then insert the
connector into the power supply interface of the reader. If the power supply of the reader is
via the Ethernet interface, only the pin
NOTICE
Redundant power supply not permissible
Note that simultaneous/redundant power supply via 24 V DC and PoE is not permitted.
Earth connection
You need to connect the SIMATIC RF1100 reader to functional earth (FE). The reader has a pin
for earthing to which an earthing cable can be attached.
This connection to functional earth (FE) is also required to discharge any interference
currents to earth and for EMI resistance.
Protection against external electrical influences
Below is a description of what you must pay attention to in terms of protection against
electrical impacts and/or faults:
• In all plants or systems in which the reader is installed, you must ensure that the plant or the
system for dissipating electromagnetic interference is connected to functional earth.
• For supply, signal and bus cables, you must ensure that the cable routing and installation are
correct.
• For signal and bus lines, you must ensure that a wire/cable breakage or a cross-circuit does
not lead to undefined states of the plant or system.
SIMATIC RF1100
Operating Instructions, 08/2023, C79000-G8976-C698-02
+24 V DC (max. 1 A)
Reference ground to +24 V DC
Earth connection (FE)
Wiring diagram: Socket for the external 24 V DC power supply (view from above)
③
can be assigned to functional earth (FE).
Connecting
5.2 24 V DC power supply
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