Siemens 6ES7138-4FA05-0AB0 Programmable Logic Controller Module

Siemens 6ES7138-4FA05-0AB0 is a PROFIsafe electronic input module for the SIMATIC ET 200S distributed I/O system, delivering 4 or 8 fail-safe digital inputs (F-DI) at 24 V DC in a compact 30 mm-wide enclosure. Designed for safety-critical signals, it supports PROFINET networks when used with the IM 151-3 HF, enabling reliable safety input expansion in industrial automation. The module provides safety ratings up to PL e (ISO 13849-1) and up to SIL 3 (IEC 61508) with two-channel configurations, and SIL 2 for single-channel operation, complying with EN 954-1 safety classifications. Its compact dimensions are 30 x 81 x 52 mm (width x height x depth) and it weighs approximately 78 g. Diagnostic features include readable diagnostic information, alarms, a red SF (group error) LED, and a green status indicator for the digital inputs, helping to quickly identify safety faults. Typical applications include monitoring emergency-stop devices, safety interlocks, safety doors, and light curtains within a PROFIsafe safety architecture on ET 200S networks, providing safe, fail-safe input signals for hazardous processes. This module is intended as a safety I/O component in Siemens’ SIMATIC DP/ET 200S ecosystem and enables safe, scalable integration of safety signals in both PROFIsafe and PROFINET configurations.