Overview
The Siemens SIRIUS 3RH2911-1XA04-0MA0 is a high-quality, front-mountable Auxiliary Switch Block designed for expanding the number of auxiliary contacts on Siemens SIRIUS 3RT2 power contactors and 3RH2 contactor relays. This essential industrial control component features a configuration of 4 Normally Closed (NC) instantaneous contacts with a secure and reliable screw terminal connection type.
Part of the flexible SIRIUS modular system, the 3RH2911-1XA04-0MA0 easily snaps onto the front of compatible contactors and contactor relays without the need for tools, simplifying installation and maintenance. It provides four distinct, electrically separated NC contact paths (51/52, 61/62, 71/72, 81/82) for robust signalling and control circuit applications. This block is ideal for critical interlocking and control functions, ensuring reliable operation in various industrial environments.
Key Benefits & Features
- Effortless Integration: Tool-free, snap-on front mounting directly onto Siemens 3RT2 Contactors and 3RH2 Contactor Relays.
- High Contact Density: Provides 4 Normally Closed (NC) auxiliary contacts for versatile control circuit expansion.
- Reliable Connections: Features robust screw terminals for secure and permanent wiring.
- SIRIUS Modular System: Ensures seamless compatibility and integration within the broader Siemens SIRIUS industrial controls family.
- Safety Features: Designed with potential for use as a Mirror Contact (with 3RT2) and for Positively Driven Operation (with 3RH2) in safety applications (refer to device standards).
- Durable Design: Mechanical service life of typically 10 million switching cycles and IP20 protection class on the front.
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