Siemens SIMATIC RF166C, Руководство по эксплуатации

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Connecting
5.2 Electrical design of the CM
SIMATIC RF166C
Operating Instructions, 12/2019, C79000-G8976-C578-01
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Circuit breaker
According to IEC 60364, line protection is required, i.e. the supply lines must always be
protected externally.
All supply voltages must be protected with a UL/IEC approved fuse 24 V DC / 16 A (tripping
characteristic type B or C). At ambient temperatures of 40 °C to 55 °C, the power supplies
must be protected with a UL/IEC approved fuse 24 V DC / 12 A.
Power supply of the assembly
Two voltage groups are available for the communications module, 1L+ (supply voltage) and
2L+ (load voltage).
Another power supply may be required in order to supply all communications modules of an
assembly with the required voltage. Another voltage supply of 1L+ and 2L+ may be needed
to form different potential groups, or because the voltage is insufficient for all
communications modules due to the voltage drop. Create a power budget for the selection of
the supply point of the voltage.
Note
Switching 1L+ and 2L+ on and off
Note that the power supply (1L+) supplies the communications module and the readers with
power. Load voltage (2L+) has no direct effect on the RF166C communication module.
The following figure shows a configuration with another voltage supply for the
communications modules. The different potential groups are highlighted in gray.
Figure 5-5 Wiring of the power supply