Siemens 3RH6911-1DA11 Lateral Auxiliary Switch Block, 1 NO + 1 NC, Size S00, Screw Terminal Original Brand New

Overview

The Siemens 3RH6911-1DA11 is a high-quality lateral auxiliary switch block engineered for reliable performance in motor control applications. Designed for Siemens motor contactors of size S00, this auxiliary block expands switching capability with 1 Normally Open (1 NO) and 1 Normally Closed (1 NC) contact. Built with durable screw terminals and fully compliant with DIN EN 50012 and DIN EN 50005, it ensures safe installation, robust connectivity, and long-term operational efficiency.

Benefit

• Enhanced Functionality: Adds additional auxiliary contacts to motor contactors.

• Reliable Switching: Offers dependable signal transmission with 1 NO + 1 NC configuration.

• Easy Installation: Screw terminals simplify wiring and ensure a secure connection.

• Durable Construction: Siemens industrial-grade components deliver long service life.

• Standards Compliant: Meets DIN EN 50012 and DIN EN 50005 for safety and installation compatibility.

• Space-Saving Design: Lateral mounting supports compact control panel layouts.

Function

The 3RH6911-1DA11 block functions to multiply the control circuit contacts. When the main motor contactor is energized and closes the power circuit, the auxiliary contacts also change state.

• The NO contact closes, typically used for run-status indication, external relay control, or self-holding circuits.

• The NC contact opens, commonly used for electrical interlocking (preventing a second contactor, such as a reverse contactor, from engaging simultaneously) or fault signalling.

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