SIEMENS
SIEMENS 3RH29111NF20 auxiliary contact block 2NO 690V AC
Adds two normally open auxiliary contacts with screw terminals for SIRIUS 3RH2 and 3RT2 contactors up to 690 V AC
- 2 normally open contacts for expanded control logic
- 690 V AC rating suits industrial power circuits
- Front-mount design enables quick panel installation
- Screw terminals provide secure wire connections
- IP20 protection guards against finger contact
SIEMENS 3RH29111NF20 auxiliary contact block
The SIEMENS 3RH29111NF20 is an auxiliary contact block designed for industrial control circuits. It provides two normally open contacts rated for 690V AC operation. The unit mounts on the front of compatible SIRIUS contactor relays and contactors. It suits panel builders and maintenance engineers expanding control functionality.
Check SIRIUS series and frame size compatibility
Verify that the existing device belongs to the SIRIUS 3RH2 contactor relay or 3RT2 contactor series. Confirm the frame size matches S0, S00, S2 or S3, or NEMA size 0 or 00. Ensure the control circuit voltage does not exceed the 690V AC rating. The block requires a front mounting position on the host device.
Solid state construction with screw terminals
The solid state design offers reliable switching without moving contact wear. Screw terminals accept standard wire ferrules for secure wiring. Front mounting allows easy access for installation and inspection. IP20 rating provides finger safe protection for operator safety. Two normally open contacts give simple circuit closure indication.
Highlights
- 2 normally open contacts for expanded control logic
- 690 V AC rating suits industrial power circuits
- Front-mount design enables quick panel installation
- Screw terminals provide secure wire connections
- IP20 protection guards against finger contact
Specifications
| Brand | SIEMENS |
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Questions about this item
Does the 3RH29111NF20 auxiliary contact block include the mounting hardware, or must I buy it separately?
The block is designed for front mounting directly onto compatible SIRIUS 3RH2 contactor relays and 3RT2 contactors; no separate mounting kit is required.
How do I choose between the 2NO version and other contact configurations for my control circuit?
Select the 2NO version when you need two normally-open contacts that close together with the main contactor; choose a version with normally-closed contacts if your logic requires break-before-make or safety interlock functions.
What does the 690V AC rating mean when the block is installed in a live panel?
It indicates the maximum operational voltage the auxiliary contacts can switch safely; the block is rated IP20 and suited for control circuits up to 690V AC in SIRIUS S0, S00, S2 and S3 frame sizes.
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