Siemens SIRIUS 3RH Series - Coupling Link for PLC; Description

SIRIUS 3RT2 contactors/contactor assemblies
2.7 Accessories
SIRIUS Innovations
190 System Manual, 01/2011, A8E56203870002-03
2.7.9 Coupling link for PLC
2.7.9.1 Description
Thanks to a low control power (< 0.5 W) and an operating range of 17 to 30 V DC, the
3RH2924-1GP11 coupling link enables a size S0 contactor with a 24 V DC drive to be
connected directly to the PLC output. The control voltage for the coupling link and the rated
control supply voltage for the contactor are galvanically isolated. An LED indicates the
switching state of the coupling link. The 3RH2924-1GP11 coupling link features an
integrated surge suppressor (varistor) for the contactor coil being switched.
Scope of supply
The following components ship with the 3RH2924-1GP11 coupling link:
● Coupling link
● 3RT2926-4RA11 coil terminal module with coil terminal from above (screw-type
connection system)
Circuit diagram
3RH2924-1GP11 coupling link for control from the PLC.
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1
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8
8
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1 Coupling link
2 Contactor
B1+/B2- Control voltage 24 V DC
L1/N Rated control supply voltage for the selected contactor
Figure 2-34 Coupling link, circuit diagram (size S0)