Siemens 6ES7138-6AA01-0BA0 SIMATIC ET 200SP TM Count 1x24V Counter Module 800kHz Remote I/O Module

The Siemens 6ES7138-6AA01-0BA0 is a SIMATIC ET 200SP TM Count 1x24V module with one incremental or pulse encoder counter channel running up to 800 kHz counting frequency (quadruple evaluation), plus 3 digital inputs and 2 digital outputs. It mounts on BaseUnit type A0 and supports S7-1500 Motion Control high-speed counter technology objects.

Technical Specifications

Selection Notes

This module sits alongside DI/DQ modules in an ET 200SP station specifically to bring in encoder counting without a dedicated PLC input card. The 800 kHz max counting frequency (quadruple evaluation) covers most incremental encoders used for length or position feedback; above that, Fast mode trades address space (4 bytes) for lower latency. Two onboard comparators let the counter trigger outputs directly at preset values without a program scan cycle, useful for cut-to-length or batch-count applications.

Applications

Length measurement, batch counting, and simple positioning feedback on ET 200SP remote I/O stations tied to SIMATIC S7-1500 controllers, including motion-control axes that need a hardware pulse or encoder input.