Siemens SIMATIC ET 200SP TM Count 1x24V (6ES7138-6AA01-0BA0) is a single-channel 24 V counter module for the ET 200SP distributed I/O system, designed to count external 24 V signal events via a dedicated counting channel. The module provides 1 counter channel for a 24 V incremental encoder or pulse encoder and includes 3 digital inputs and 2 digital outputs, with packaging described as suitable for BU type A0 devices. Firmware is version V2.0, and Siemens lists this part as a compatible replacement for 6ES7138-6AA00-0BA0, confirming its role as a TM Count 1x24V technology module within ET 200SP.
