Siemens 6ES7 492-1AL00-0AA00 Interface Connector

Siemens 6ES7 492-1AL00-0AA00 front connector is a 48-pin interface for SIMATIC S7-400 signal modules, configured with screw contacts to secure field wiring. Designed to mount on the S7-400 backplane, it provides the electrical path between the central processor and attached IO or signal modules, enabling reliable signal transfer in industrial control panels. This front connector is specified for the SIMATIC S7-400 family, including CPUs in the S7-400/S7-400H/S7-400F/FH lineups, and is used wherever sturdy, screw-terminal terminations are required on the backplane side of the cabinet. Siemens catalogs and third-party retailers describe variants of this connector that cover alternative termination methods—screw contacts is the primary 48-pin option, with other configurations offered as spring-loaded terminals or crimp contacts for different installation preferences. The 48-pin arrangement corresponds to the standard front-end interface for signal modules in S7-400 systems, supporting parallel wiring to multiple I/O points and ensuring compatibility with the modular design of the S7-400 series. In typical installations, technicians mount this front connector in the cabinet to bridge the CPU backplane with signal modules, facilitating the connection of control logic, sensors, and actuators within a compact, organized assembly.