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Siemens Auxiliary Contact Block: 1NO/1NC, Front Mount - Siemens Auxiliary Contacts
SiemensSiemens Auxiliary Contacts

Siemens Auxiliary Contact Block: 1NO/1NC, Front Mount

The SIEMENS Auxiliary Contact Block (MPN 3RH29111MA11) is a front-mounted, 1NO/1NC contact block designed for use with SIRIUS 3RH2 Contactor Relays. It features a Frame Size of S3 and is manufactured by Siemens.

SKU 3G-OTH-38135

Brand
Siemens
Item
Auxiliary Contact Block: 1NO/1NC, Front Mount
Category
Siemens Auxiliary Contacts
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Technical Specifications

Siemens
Manufacturer Part Number
3RH29111MA11
Frame Size
S3
Compatible with Series
SIRIUS 3RH2 Contactor Relays
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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SIEMENS Auxiliary Contact Block (MPN 3RH29111MA11) is a front-mounted, 1NO/1NC contact block designed for use with SIRIUS 3RH2 Contactor Relays. It features a Frame Size of S3 and is manufactured by Siemens.

Frequently Asked Questions

What is the SIEMENS 3RH29111MA11 auxiliary contact block used for?

The SIEMENS 3RH29111MA11 auxiliary contact block is used to add extra signaling or control contacts to SIRIUS 3RH2 contactor relays. It is commonly applied in industrial motor control panels, conveyor systems, and automation circuits where monitoring of relay status is required.

What are the specifications of the SIEMENS 3RH29111MA11 auxiliary contact block?

The SIEMENS 3RH29111MA11 is a front-mounted auxiliary contact block with 1 normally open and 1 normally closed contact. It has a frame size of S3 and is compatible with the SIRIUS 3RH2 contactor relay series. The manufacturer part number is 3RH29111MA11.

Where to buy the SIEMENS 3RH29111MA11 auxiliary contact block worldwide?

You can source the SIEMENS 3RH29111MA11 auxiliary contact block through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time.

How to install the SIEMENS 3RH29111MA11 auxiliary contact block?

To install the SIEMENS 3RH29111MA11, first ensure the SIRIUS 3RH2 contactor relay is de-energized. Snap the front-mounted block onto the relay's front face until it locks. Wire the NO and NC terminals according to your control circuit diagram. Always follow Siemens installation guidelines for safety.

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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