Key Features
- TM PosInput 2 counter and position detection module: Provides 2 channels for RS-422 incremental encoder or SSI absolute encoder signals.
- Per-channel I/O: Includes 2 DI and 2 DQ per channel.
- Encoder signal interfaces: Supports RS 422 and SSI; TTL 5 V is supported for push-pull encoders only.
- Engineering and update support: Configurable and integrated in STEP 7 TIA Portal from version V17, with FW update possible.
- Diagnostics and display: Includes diagnostic alarm, hardware interrupt, supply-voltage monitoring, and RUN, ERROR, MAINT, PWR and channel status LEDs.
Applications
- Position detection for encoder signals: Captures position information from RS-422 incremental encoder or SSI absolute encoder signals.
- Counting and measuring on two channels: Provides counter functions, fast mode, comparator functions, and measuring functions on 2 channels.
- Motion-control signal acquisition: Supports incremental acquisition, absolute acquisition, and is suitable for S7-1500 Motion Control.
Technical Summary
| Product type designation | TM PosInput 2 |
|---|---|
| Number of channels | 2 |
| Encoder signals, incremental encoder (symmetrical) | RS 422 |
| Encoder signals, absolute encoder (SSI) | to RS-422 |
| STEP 7 TIA Portal configurable/integrated from version | V17 |
| Firmware version | V2.0 |
| Load voltage L+ rated value (DC) | 24 V |
| Load voltage L+ permissible range, lower limit (DC) | 19.2 V |
| Load voltage L+ permissible range, upper limit (DC) | 28.8 V |
| Power consumption from the backplane bus | 1.3 W |
| Power loss, typ. | 5.5 W |
| Rail mounting | Yes; S7-1500 mounting rail |
Frequently Asked Questions
What is the Siemens 6ES7551-1AB01-0AB0?
It is a SIMATIC S7-1500 TM PosInput 2 counter and position detection module.
How many channels does 6ES7551-1AB01-0AB0 have?
It has 2 channels.
Which encoder signals are supported by TM PosInput 2?
It supports RS-422 incremental encoder signals and SSI absolute encoder signals.
What are the supply requirements for the module?
The load voltage L+ is 24 V DC, with a permissible range of 19.2 V to 28.8 V.
What engineering software version is needed for configuration?
It is configurable and integrated in STEP 7 TIA Portal from version V17.
