The Siemens SIMATIC S5 CP 521 SI Communications Processor, model 6ES5521-8MA22, is a specialized interface module engineered for serial communication in industrial automation environments. This processor facilitates efficient data exchange between Siemens S5 PLCs and external devices such as programming terminals, printers, or supervisory systems. Operating over standard RS-232C or RS-422 interfaces, it supports both point-to-point and multi-point configurations, making it ideal for distributed control systems. The CP 521 SI includes comprehensive diagnostic functions to monitor link integrity and transmission errors, ensuring high reliability in factory floor or process control settings. Its compact design allows direct mounting in the S5 rack, and it is fully compatible with the SIMATIC S5 software ecosystem for configuration and operation.
| Parameter |
Specification |
| Product Type |
Communications Processor |
| Model Number |
6ES5521-8MA22 |
| System Compatibility |
Siemens SIMATIC S5 |
| Interface Type |
RS-232C / RS-422 (selectable) |
| Communication Protocol |
Point-to-point, Multi-point (SI protocol) |
| Data Rate |
Up to 19.2 kbps |
| Transmission Distance |
Up to 1200 m (RS-422) / 15 m (RS-232C) |
| Diagnostic Functions |
Built-in error detection, line monitoring |
| Power Supply |
5 V DC from S5 backplane bus |
| Current Consumption |
Typical 0.8 A |
| Operating Temperature |
0 °C to +60 °C |
| Storage Temperature |
-20 °C to +80 °C |
| Protection Class |
IP20 |
| Dimensions (W x H x D) |
40 mm x 125 mm x 120 mm |
| Weight |
Approx. 0.3 kg |
What Does Our Clients Say
Mitsubishi MR-J4
Laura Navas
Great product!
2019/12/01
Keyence sensor
EQDR SALES
Original and fast!
2020/02/22