Siemens Counter module, TM count 2x 24V, 2-channel, 3DI +2DQ Part number 6ES7550-1AA01-0AB0

Product Overview

The Siemens 6ES7550-1AA01-0AB0 is the Siemens SIMATIC S7-1500 TM Count 2×24 V counter module, offering two channels for incremental encoders or pulse inputs plus digital I/O — designed for high-speed counting, position detection or pulse measurement in automation systems.

Key Features

• TM Count 2×24 V counter module for SIMATIC S7-1500
• 2 independent counter channels for 24 V incremental encoders or pulse inputs
• Per channel: 3 digital inputs (DI) and 2 digital outputs (DQ) — for flexible input/output handling
• Supports high-speed input frequencies up to 200 kHz — suitable for fast encoder or pulse-generator signals
• Includes I&M (Identification & Maintenance) data support (I&M0 to I&M3) for diagnostics, tracking and maintenance history
• Isochronous mode supported — enabling synchronized, deterministic counting or motion-control applications
• Compact module design compatible with S7-1500 rack installation
• Integrated logic suitable for motion control, pulse counting, position sensing or frequency measurement tasks

Technical Specifications

• Article Number: 6ES7550-1AA01-0AB0
• Module Type: TM Count 2×24 V counter module
• Counter Channels: 2 × 24 V incremental-encoder/pulse channels
• Digital Inputs per Channel: 3 DI
• Digital Outputs per Channel: 2 DQ
• Maximum Input Frequency: 200 kHz
• I&M Data Support: I&M0 to I&M3
• Operation Modes: Standard counting modes, isochronous mode for synchronized tasks
• Supply Voltage: 24 V DC (system standard for S7-1500 I/O modules)
• Mounting: For S7-1500 rack / backplane bus—fits standard system layout
• Application Scope: Encoder signal processing, pulse counting, frequency measurement, position detection, motion control integration

Compliance & Integration

• Part of the SIMATIC S7-1500 technology-module family
• Fully compatible with S7-1500 CPU and I/O modules — plug-in on S7 backplane bus
• Designed for industrial automation, motion control, process monitoring and control applications requiring high-speed counting or encoder interfacing

Applications

The 6ES7550-1AA01-0AB0 module is ideal for applications involving incremental encoders, rotary or linear position sensing, pulse counting, frequency monitoring, motion control, conveyor tracking, or other automation tasks requiring accurate high-speed counting or pulse signal handling. It is suitable for machine control, packaging lines, robotics, production automation, and any system where encoder feedback or pulse-based inputs are used.