Overview
The OMRON CS1W-PRM21 is a high-performance PROFIBUS-DP Master Unit designed for the CS1 series PLCs. It efficiently exchanges I/O data and communication information between field devices and the CPU, ensuring smooth and stable industrial network control. By processing data independently of the CPU, this unit significantly reduces system load and improves response speed.
Engineered to meet the EN50170 Volume 2 and IEC61158 standards, the CS1W-PRM21 supports all standard baud rates up to 12 Mbit/s. Its simple FDT/DTM-based configuration enables quick setup and flexible integration with GSD-based slave devices.
Key Features
- Supports PROFIBUS-DP Master Class 1 with DP-V1 data types
- Handles data independently from the CPU to reduce processing load
- Supports up to 125 PROFIBUS slaves with a maximum of 7,168 I/O words
- Compatible with baud rates from 9.6 kBit/s to 12 MBit/s
- Configuration via Generic DTM for flexible device setup
- Provides Sync, Unsync, Freeze, Unfreeze, and Clear global control services
- Compact and lightweight structure for easy installation
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | CS1W-PRM21 |
| Manufacturer | OMRON |
| System Series | CS1 Series |
| Function | PROFIBUS-DP Master Class 1 with DP-V1 Support |
| Unit Number | 0–15 (Special CPU Unit) |
| Max Units per PLC | 16 (Depends on CPU Type) |
| Configurator | FDT/DTM Based (Generic DTM for GSD Slaves) |
| Supported Baud Rates | 9.6 kBit/s to 12 MBit/s (Selectable via Configurator) |
| PROFIBUS Address Range | 0–125 |
| Max Number of Slaves | 125 |
| Max I/O Points | 7,168 Words |
| I/O per Slave | 244 Bytes In / 244 Bytes Out |
| Control & Status Area Size | 25 Words |
| Supported Global Control Services | Sync, Unsync, Freeze, Unfreeze, Clear |
| Supported Communication Services | Data Exchange, Slave Diag, Set PRM, Chk Cfg, Global Control |
| Power Consumption | 400 mA at 5 VDC |
| Dimensions (W × H × D) | 34.5 mm × 130 mm × 111.2 mm |
| Weight | 154 g |
| Operating Temperature | 0 °C to +50 °C |
| Storage Temperature | -20 °C to +70 °C |
| Mounting Type | DIN Rail or Panel Mount |
Performance and Communication
The CS1W-PRM21 delivers rapid communication and high data throughput, supporting advanced PROFIBUS features such as diagnostic exchange and configuration checks. Engineers can manage up to 125 slave devices while maintaining consistent response times. Its modular structure allows easy expansion for large-scale automation systems.
With independent data handling, the CS1W-PRM21 keeps the PLC CPU free for logic control tasks, improving overall system stability and performance.
Origin, Dimensions & Weight
- Origin: Japan
- Dimensions: 34.5 mm × 130 mm × 111.2 mm
- Weight: 154 g
Details
| Weight | 0.154 kg |
|---|---|
| Dimensions | 34.5 × 130 × 111.2 mm |
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