Overview
The 3RK3221-1AA10 is a Siemens 3RK32-series safety-related expansion module, configured as 2/4 F-DI 1/2 F-RO (fail-safe digital inputs and relay outputs). It is rated IP20 for in-cabinet use, mounts on DIN rail, and terminates via screw-type terminals. The module is rated for a shock of 15g / 11 ms and carries a pollution degree of 3, suiting it for industrial environments with moderate vibration and contamination.
Function & operation
The 15g / 11 ms shock rating indicates the module can withstand mechanical shocks common in machine-mounted or conveyor-adjacent installations without losing safety integrity. The finger-safe touch protection and 300 V insulation voltage support safe handling during maintenance.
Market & positioning
The 3RK3221-1AA10 belongs to the Siemens 3RK32 expansion module family, designed for distributed safety I/O in machine safety systems. It is typically specified alongside.