Product Overview
Technical Summary
| Parameter | Value |
|---|---|
| Module type | FM 451 positioning module |
| Drive function | Rapid/slow traverse drives |
| Channels | 3 |
| Digital inputs | 12; 4 per axis |
| Digital outputs | 12; 4 per axis |
| Rated supply voltage | 24 V DC |
| Supported encoders | Incremental encoder (symmetrical), incremental encoder (asymmetrical), absolute encoder (SSI) |
| Symmetrical incremental input signal | 5 V difference signal (phys. RS 422) |
| Symmetrical incremental input frequency, max. | 1 MHz |
| Asymmetrical incremental input frequency, max. | 50 kHz; for 25 m cable length, 25 kHz for 100 m cable length |
| Required front connector | 1x 48-pin |
Applications
- Positioning control: The module supports start/stop positioning and rapid traverse, creep, run right, and run left control functions.
- Reference and reversing cam signals: Digital inputs support reference cams, reversing cams, and flying actual value setting.
Key Features
- 3-channel positioning module: FM 451 supports positioning for rapid/slow traverse drives across 3 channels.
- Digital I/O: The module has 12 digital inputs and 12 digital outputs, with 4 inputs and 4 outputs per axis.
- Encoder support: It supports symmetrical incremental, asymmetrical incremental, and absolute encoder (SSI) types.
- Encoder signal interfaces: Symmetrical incremental encoders use 5 V difference signals (phys. RS 422); SSI uses DATA, notDATA, CL, and notCL signals.
- 24 V supply and connection: Rated supply voltage is 24 V DC. A 1x 48-pin front connector is required.
- Installation dimensions and protection: Dimensions are 50 mm width, 290 mm height, and 210 mm depth. Digital inputs and outputs have potential separation; digital outputs have short-circuit protection.
Frequently Asked Questions
1. What function does Siemens 6ES7451-3AL00-0AE0 provide?
It is a SIMATIC S7-400 FM 451 positioning module for rapid/slow traverse drives with 3 channels.
2. How many digital inputs and outputs does the FM 451 have?
It has 12 digital inputs and 12 digital outputs, with 4 inputs and 4 outputs per axis.
3. Which encoder types does 6ES7451-3AL00-0AE0 support?
It supports symmetrical incremental encoders, asymmetrical incremental encoders, and absolute encoders (SSI).
4. What supply and front connector does the module require?
The rated supply voltage is 24 V DC, and the required front connector is 1x 48-pin.
