Performance Overview
The Siemens 3RH2911-1FA22 is an industrial-tier 4-pole auxiliary contact block designed to expand the signaling capacity of the flagship SIRIUS control network. Engineered for direct front-side snap-on installation onto 3RT2 power contactors and 3RH2 contactor relays, this space-saving module requires no tools or DIN rail extensions. It provides an efficient 2NO (Normally Open) and 2NC (Normally Closed) instantaneous contact configuration, ideal for implementing electrical interlocks, remote loop status feedback, and PLC system state signaling. Equipped with robust screw terminals that provide secure wire retention under severe heavy-vibration environments, it functions as a highly dependable hardware solution for complex machinery control panels.
📋 Critical Application Check
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Industry: Motor Start-Stop Feedback Chains, Electrical Control Cabinet Interlocks, Cascade Conveyor Enable Loops, Star-Delta Motor Control Centers.
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Panel Density Optimization: The front-mount configuration allows direct integration onto existing contactor bodies, maintaining a compact footprint within narrow electrical enclosures.
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System Resiliency: Boasts a mechanical endurance of 10 million switching cycles under wide operating temperatures (-25°C to +60°C) to ensure consistent signaling performance.
Siemens Industrial Controls Integration:
