Product Description
Siemens 3RH2911-1GA31 four pole auxiliary contact block with 3 normally open (N.O.) and 1 normally closed contacts. This Siemens Sirius auxiliary mounts to the front of any 3RH2122, 3RH2131 or 3RH2140 four pole industrial control relay and provides an additional 4 signalling contacts. Only one 3RH2911-1GA31 can be added per relay and each comes with screw terminals for easy installation and removal.
| Number of Poles | 4 |
| Contacts |
3 normally open (N.O.) 1 normally closed (N.C.) |
| Terminals | Screw |
| Mounting | Front |
| Installs on | 3RH2122. 3RH2131, 3RH2140 |
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The auxiliary switch block can easily be snapped onto the front of the contactors. The auxiliary switch block has a centrally positioned release lever for disassembly. The contactor relays with 4 contacts according to EN 50011, with the identification number 40E, can be extended with 80E to 44E auxiliary switch blocks to obtain contactor relays with 8 contacts according to EN 50011. The identification numbers 80E to 44E on the auxiliary switch blocks apply to the complete contactors. These auxiliary switch blocks (3RH29 11–1GA..) cannot be combined with contactor relays with identification numbers 31E and 22E; they are coded. All contactor relays with 4 contacts according to EN 50011, identification numbers 40E to 22E, can be extended with auxiliary switch blocks 40 to 02 to obtain contactor relays with 6 or 8 contacts in accordance with EN 50005. The identification numbers on the auxiliary switch blocks apply only to the attached auxiliary switch blocks.
