Supply Voltage And Profinet Io Loop-Through - Siemens SIMATIC RF185C Operating Instructions Manual

5.5

Supply voltage and PROFINET IO loop-through

The RF18xC communications modules each have two M12 connections for the supply
voltage and PROFINET IO. Supply takes place via the 1st connection, the supply voltage
and PROFINET IO can be forwarded to another device via the 2nd connection.
Figure 5-11
Notes for wiring
● When wiring your assembly, you need to take into account the effect of the cable length
on the supply voltage at the RF18xC.
● The maximum supply current of the communications module is 16 A at 1L+ and 2L+ for a
maximum ambient temperature of 40 °C. At ambient temperatures of 40 °C to 55 °C, the
maximum supply current is 12 A. These values must not be exceeded.
● Adhere to the current carrying capacity of the connected cables, which depends on the
conductor material, the conductor cross-section and the ambient temperature.
SIMATIC RF185C, RF186C, RF188C
Operating Instructions, 10/2018, C79000-G8976-C512-01
Supply voltage and PROFINET IO loop-through
NOTICE
Damage to the device
Make sure to use a conductor cross-section of at least 1.5 mm².
If you do not observe the maximum permissible supply current and the cable cross-
section required, this may result in the cable isolation and contacts overheating and in
the device being damaged.
5.5 Supply voltage and PROFINET IO loop-through
Connection
39