ABB 1SSS444709R1100 snap-on auxiliary contact block
1SSS444709R1100 is snap-on auxiliary contact block for ABB standard AC contactors. It is a pluggable accessory installed on contactor front or side to expand spare auxiliary contacts for interlock and status feedback. New original stock and tested refurbished products support cabinet assembly and field equipment spare replacement.
Description
Product Introduction
1SSS444709R1100 is snap-on auxiliary contact block for ABB standard AC contactors. It is a pluggable accessory installed on contactor front or side to expand spare auxiliary contacts for interlock and status feedback. New original stock and tested refurbished products support cabinet assembly and field equipment spare replacement.
Model Definition
1SSS is fixed part prefix of ABB low voltage auxiliary spare coding. 444709 represents base specification code of this auxiliary contact unit. Suffix R1100 means factory standard hardware revision and default contact layout. Variant revisions only optimize small internal parts without changing mounting size and electrical parameters.
Technical Specifications
Rated control voltage up to AC/DC 250V for industrial control circuit. Quick snap-fit mechanical structure matching corresponding ABB contactor frames. Operating ambient temperature: -20℃~+60℃, storage temperature: -40℃~+85℃, relative humidity 5%~95% non-condensing. Protection grade IP20, conforms to IEC and CE certification with long mechanical switching lifespan.
Interface and Communication Configuration
Screw type terminals for external control cable wiring. No built-in serial or fieldbus communication port; all signal transmission relies on hardwire connection with peripheral components.
Core Functions
Synchronously open and close together with matched main contactor movement. Supply isolated switching signals for PLC running feedback, pilot lamp drive and safety interlock loop to make up insufficient original built-in contact points of contactor.
Application Scenarios
Widely used in pump, fan and compressor motor control cabinets, low voltage distribution panels of chemical, metallurgy and water treatment industry for logic interlock and equipment status signal output.
Operation and Maintenance Instructions
Cut off control circuit power before mounting or disassembly and wait for residual voltage discharge. Perform semi-annual maintenance to blow dust off terminals with dry compressed air and retighten wiring screws. If abnormal contact action appears, check clamping installation first before replacement, prohibit overloaded current to avoid contact ablation damage.
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