Siemens 6FX1122-1AC02 2-Channel Safety Relay Module

Siemen​s 6FX1122-1AC02 is a two‑channel safety relay module designed as a PLC‑NC coupling block for SINUMERIK 3 systems and SIROTEC RCM configurations. Marketed as the replacement for the earlier 6FX1122-1AA02, this Koppelbaugruppe provides two independent safety relay outputs to carry safety‑critical signals between the control side and the SINUMERIK NC interface, forming the safe link within the machine’s safety network. The module is specified in distributor listings as a direct successor to the 1AA02 variant, ensuring compatibility with legacy SINUMERIK 3 installations and SIROTEC RCM safety circuits. Typical applications involve interfacing external safety devices or controllers with the SINUMERIK 3/SIROTEC RCM ecosystem, enabling reliable signaling for safety‑related operations across two channels and supporting the integrity of the machine’s protective interlocks within a safety architecture. As a Siemens original part, 6FX1122-1AC02 is used where a compact, two‑channel NC coupling module is required to maintain deterministic safety behavior in automation environments that rely on SINUMERIK 3 controls.