The 6ES5251-1AA11 is an interface module from the Siemens SIMATIC S5 series, built to link controllers with peripheral devices in industrial networks. This unit manages signal conversion and data exchange between system components. Consequently, engineers still specify it for maintaining legacy S5 automation setups.
Technical Specifications at a Glance
The table below presents the main technical parameters of the 6ES5251-1AA11. Each figure comes from the manufacturer’s official documentation.
| Parameter | Specification |
|---|---|
| Product type | Interface module |
| Compatibility | SIMATIC S5 PLC systems |
| Function | Signal conversion and data transfer |
| Interface | Backplane bus, serial port |
| Dimensions (W x H x D) | Approx. 185 x 130 x 30 mm |
| Weight | Approx. 0.30 kg |
| Power supply | 5 V DC via backplane |
| Data transfer rate | Up to 187.5 kbit/s |
| Energy storage | Not applicable |
| Part count | Single PCB assembly |
Interface Function and Data Transfer
This module handles signal conversion between the CPU and connected peripherals. Additionally, it supports data transfer rates up to 187.5 kbit/s. Therefore, it keeps communication fast and stable across the bus.
Physical Design and Installation
The module measures roughly 185 x 130 x 30 mm and weighs about 0.30 kg. Moreover, it plugs into the S5 backplane through a standard bus connector. As a result, technicians complete installation quickly without special tools.
Power Supply and System Integration
The 6ES5251-1AA11 draws 5 V DC directly from the PLC backplane. Furthermore, it exchanges data with the CPU over the internal bus. Consequently, no external wiring or separate supply is necessary.
Details
| Weight | 0.72 kg |
|---|---|
| Dimensions | 325 × 168 × 8 mm |
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