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Siemens Auxiliary Contact Block: 2NO/2NC, Front Mount - Siemens Auxiliary Contacts
SiemensSiemens Auxiliary Contacts

Siemens Auxiliary Contact Block: 2NO/2NC, Front Mount

The SIEMENS Auxiliary Contact Block (MPN 3RH29111FA22) is a front-mounted, 2NO/2NC contact block designed for use with SIRIUS 3RT2 contactors. It features a Frame Size of S2 and is manufactured by SIEMENS.

SKU 3G-OTH-38342

Brand
Siemens
Item
Auxiliary Contact Block: 2NO/2NC, Front Mount
Category
Siemens Auxiliary Contacts
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Technical Specifications

Siemens
Manufacturer Part Number
3RH29111FA22
Frame Size
S2
Compatible with Series
SIRIUS 3RT2 Contactors
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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SIEMENS Auxiliary Contact Block (MPN 3RH29111FA22) is a front-mounted, 2NO/2NC contact block designed for use with SIRIUS 3RT2 contactors. It features a Frame Size of S2 and is manufactured by SIEMENS.

Frequently Asked Questions

What is the SIEMENS 3RH29111FA22 auxiliary contact block used for?

The SIEMENS 3RH29111FA22 auxiliary contact block is used to add 2 normally open and 2 normally closed switching contacts to SIRIUS 3RT2 contactors. It is front-mounted and commonly applied in industrial motor control and automation systems for signaling, interlocking, or status feedback.

What are the specifications of the SIEMENS 3RH29111FA22 auxiliary contact block?

The SIEMENS 3RH29111FA22 is a front-mounted auxiliary contact block with 2NO/2NC contacts. It has a Frame Size of S2 and is compatible with SIRIUS 3RT2 contactors. The manufacturer part number is 3RH29111FA22, and it is made by SIEMENS.

Where to buy the SIEMENS 3RH29111FA22 auxiliary contact block worldwide?

You can source the SIEMENS 3RH29111FA22 auxiliary contact block worldwide through 3G Electric. As a global industrial equipment distributor since 1990, 3G Electric handles full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time.

How to install the SIEMENS 3RH29111FA22 auxiliary contact block?

To install the SIEMENS 3RH29111FA22 auxiliary contact block, mount it directly onto the front of a compatible SIRIUS 3RT2 contactor. Ensure the contactor is de-energized, align the block with the mounting slots, and snap it into place. Wire the NO/NC terminals per your control circuit diagram.

Used in

Common applications for Siemens
District cooling plants — LME73 + RWF55 for condenser-water modulation
Inflight catering and food-processing steam boilers — LMG22 with SQN90 air-fuel cross-damper
Hospital steam-plant redundancy — LME41 with QRA2 UV flame detection for dual-fuel boilers
Semiconductor fab process heat — LME23 and SKP55 gas valves on hot-oil heater skids
Container-terminal reefer-deck heating — LMG22 retrofit onto legacy burner racks

Siemens Products

3G Electric supplies Siemens siemens auxiliary contacts. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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