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- - - - SIEMENS 3RH1911-1FA22 Auxiliary Contact Block
        
        Product Overview
        
        SIEMENS 3RH1911-1FA22 is a SIRIUS Auxiliary Contact Block (Auxiliary Switch Block) used for expanding the auxiliary contacts of Siemens contactors and contactor relays. It is installed on the front of compatible contactors to provide additional NO/NC signal contacts for control, feedback, and interlocking circuits.
        
        This model provides 2 normally open contacts + 2 normally closed contacts (2NO + 2NC), uses screw terminals, and is designed for S00 size contactors and contactor relays.
        
        Specifications
        
        Brand: SIEMENS
        
        Series: SIRIUS 3RH19
        
        Model: 3RH1911-1FA22
        
        Product Type: Auxiliary Contact Block / Auxiliary Switch Block
        
        Contact Configuration: 2NO + 2NC
        
        Mounting Type: Front snap-on mounting
        
        Size: S00
        
        Connection Type: Screw Terminal
        
        Compatible Devices:
        
        SIEMENS SIRIUS contactor relays
        
        SIEMENS SIRIUS motor contactors
        
        Rated Insulation Voltage: 690 V
        
        Rated Impulse Withstand Voltage: 6 kV
        
        Protection Rating: IP20
        
        Mechanical Life: Approx. 10 million switching cycles
        
        Electrical Life: Approx. 200,000 switching cycles (AC-15, 230 V)
        
        Operating Temperature: -25…+60 °C
        
        Advantages & Features
        
        Adds extra auxiliary contacts without replacing the contactor
        
        Flexible 2NO + 2NC contact arrangement
        
        Quick front snap-on installation
        
        Compact S00 design saves cabinet space
        
        Reliable Siemens SIRIUS contact technology
        
        Suitable for PLC feedback and control circuits
        
        Supports electrical interlocking and status monitoring
        
        Reduces maintenance cost by extending contactor functionality
        
        Applications
        
        Industrial automation control panels
        
        Motor starter circuits
        
        PLC input feedback systems
        
        Contactor status monitoring
        
        Electrical interlocking circuits
        
        Machine control equipment
        
        Factory automation systems
        
        Low-voltage control cabinets
        
        Precautions
        
        Confirm compatibility with the installed Siemens contactor model
        
        Check contact arrangement before wiring (2NO + 2NC)
        
        Do not exceed auxiliary contact current ratings
        
        Ensure the block is properly mounted and locked
        
        Disconnect power before installation or maintenance
        
        Test contact operation after installation