Operating Power Supply - Siemens SIMATIC NET Operating Instructions Manual

Connection

6.2 Operating power supply

6.2 Operating power supply
Information on the power supply
● The terminal block can be removed from the device to allow cables to be connected.
● Supply the module only with a stabilized safety extra-low voltage according to IEC 60950
/ EN 60950-1 / VDE 0805 of 24 VDC (max. 32 VDC).
● The power source must meet the requirements of NEC Class 2 according to the UL/CSA
approval. This can be supplied via the 5-terminal block on the top of the module.
● To increase the operational reliability, the module can be supplied redundantly via the
terminals L2+/+24 V DC and M. If the regular supply voltage fails, the module
automatically switches to the redundant power supply. There is no load distribution
between the individual power supplies. The signaling contact does not indicate the failure
of one of the 24 V supplies. To monitor the power supply, the supplies and the signaling
contact must be connected to an input module.
● Catches on the terminal block ensure a secure connection to the device and avoid
polarity reversal.
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Operating Instructions, 01/2020, C79000-G8976-C270-06
Optical link module