Product Overview
Technical Summary
| Parameter | Value |
|---|---|
| Module type | TM PosInput 2 counter and position detection module |
| Channels | 2 |
| Encoder signals | RS-422 incremental encoder or SSI absolute encoder |
| Digital inputs | 4; 2 per channel |
| Digital outputs | 4 transistor outputs; 2 per channel |
| Load voltage | 24 V DC; permissible range 19.2 V to 28.8 V |
| Input frequency, max. | 1 MHz |
| Counting frequency, max. | 4 MHz; with quadruple evaluation |
| Mounting | S7-1500 mounting rail |
Applications
- Incremental encoder counting: Counts pulse, direction, and A/B-track signals from incremental encoders, including signals with a zero track.
- SSI position acquisition: Acquires absolute encoder data through SSI with parameterizable telegram lengths from 10 to 40 bit.
- Position and measurement functions: Performs incremental or absolute position acquisition, frequency measurement, cycle duration measurement, and velocity measurement.
Key Features
- Counter and position detection: TM PosInput 2 has 2 counters and supports incremental and absolute position acquisition.
- Encoder interfaces: Supports RS-422 incremental encoder signals and SSI absolute encoders; TTL 5 V is supported for push-pull encoders only.
- Channels and digital I/O: Has 2 channels, 4 digital inputs and 4 transistor digital outputs, with 2 inputs and 2 outputs per channel.
- Encoder signal performance: Input frequency is up to 1 MHz and counting frequency is up to 4 MHz with quadruple evaluation.
- Supply and protection: Load voltage is 24 V DC with a permissible range of 19.2 V to 28.8 V, reverse polarity protection, and encoder supply short-circuit protection.
- Mounting and diagnostics: Mounts on an S7-1500 mounting rail and provides diagnostic, hardware interrupt, RUN, ERROR, MAINT, PWR and channel status indications.
Frequently Asked Questions
1. What encoder signals does 6ES7551-1AB01-0AB0 support?
It supports RS-422 incremental encoder signals and SSI absolute encoder signals. TTL 5 V is supported for push-pull encoders only.
2. How many channels and digital I/O points does the module have?
It has 2 channels, 4 digital inputs and 4 transistor digital outputs, with 2 inputs and 2 outputs per channel.
3. What is the maximum counting frequency?
The maximum counting frequency is 4 MHz with quadruple evaluation. The maximum input frequency is 1 MHz.
4. What supply voltage and mounting does it use?
Load voltage is 24 V DC, with a permissible range of 19.2 V to 28.8 V. It mounts on an S7-1500 mounting rail.
