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Product Overview
The Schneider Electric ASPRTU252 is a specialized Remote Terminal Unit (RTU) communication module designed for the Modicon Compact series. This module functions as a dedicated network co-processor, offloading communication tasks from the host processor to ensure deterministic data handling and reliable telemetry routing. It is built to support critical industrial infrastructures, including remote power substations, pipeline monitoring, and mining control systems, where consistent data throughput is required despite challenging operational environments.
Features
- Dedicated microprocessor core for independent protocol processing and cyclic data transmission.
- Galvanic isolation between external serial loops and internal logic to protect against surge and ground potential issues.
- Dual selectable RS-232/RS-485 communication ports for flexible field connectivity.
- Integrated front-panel LED indicators for real-time diagnostics of port status, data transmission, and system health.
- Designed for seamless integration with the Modicon Compact series parallel backplane.
Applications
The ASPRTU252 is engineered for applications requiring robust serial communication in wide-area or remote industrial networks. It is particularly effective in environments prone to electromagnetic interference (EMI) where maintaining communication integrity and preventing bus timeouts is essential for operational continuity.
Technical Specifications
| Model |
ASPRTU252 |
| Manufacturer |
Schneider Electric |
| Protocol Support |
Modbus RTU, Modbus ASCII |
| Interfaces |
2 x RS-232/RS-485 (selectable) |
| Max Baud Rate |
19.2 Kbps per channel |
| Isolation Rating |
1500 VAC (field-to-bus) |
| Power Requirements |
550 mA at 5 VDC (backplane) |
| Operating Temperature |
0 to 60 deg C |
| Storage Temperature |
-40 to 85 deg C |
| Relative Humidity |
5 to 95% non-condensing |
Installation Guidelines
- Ensure the host system is powered down before inserting or removing the module from the Compact rack.
- Verify the module is fully seated in the backplane slot to ensure proper bus contact.
- Use shielded communication cabling and ensure proper grounding of cable shields to minimize EMI effects.
- Maintain proper ventilation within the cabinet to stay within the 0 to 60 deg C operating range.
- Confirm that serial port jumpers or software configurations match the intended physical interface (RS-232 vs RS-485) before connecting field devices.
FAQ
Does the ASPRTU252 require external power?
No, the module draws its operating power (550 mA at 5 VDC) directly from the Modicon Compact chassis backplane.
Can this module handle both Modbus RTU and ASCII?
Yes, the module is designed to support both Modbus RTU and Modbus ASCII protocols for versatile serial communication.
What is the primary purpose of the galvanic isolation?
The 1500 VAC isolation barrier prevents voltage spikes and ground potential differences from the field-side wiring from damaging the module or propagating into the host processor rack.
