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The Schneider Electric ASPRTU252 is a dedicated communication module designed for the Modicon Compact series, functioning as a high-performance Remote Terminal Unit (RTU) interface. This module is engineered to handle complex telemetry routing and deterministic protocol processing, ensuring reliable data exchange in demanding industrial environments such as remote power substations, pipeline monitoring, and mining infrastructure.
Features
- Offloads communication tasks from the host processor to maintain scan-time efficiency.
- Supports standard Modbus RTU and Modbus ASCII protocols.
- Features dual selectable RS-232/RS-485 serial interfaces for flexible field connectivity.
- Provides 1500 VAC galvanic isolation to protect internal logic from field-side electrical surges and ground loops.
- Equipped with front-panel LED indicators for immediate status monitoring of transmit/receive activity and fault conditions.
Applications
This module is ideal for distributed control systems requiring robust serial communication. It is commonly deployed in remote telemetry applications where data must be transmitted reliably over long distances while maintaining immunity to electromagnetic interference and ground potential differences.
Technical Specifications
| Model | ASPRTU252 |
| Brand | Schneider Electric |
| Operating Temperature | 0 to 60 deg C |
| Storage Temperature | -40 to 85 deg C |
| Relative Humidity | 5 to 95% non-condensing |
| Power Consumption | 550 mA at 5 VDC (backplane) |
| Isolation Rating | 1500 VAC continuous |
| Baud Rate | Up to 19.2 Kbps |
| Mounting | Standard Compact rail slot |
Installation Guidelines
- Ensure the system power is disconnected before installing or removing the module from the chassis backplane.
- Handle the module using ESD-safe precautions to prevent damage to sensitive internal components.
- Verify that the module is fully seated in the rack to ensure proper connection to the parallel backplane bus.
- Use shielded twisted-pair cabling for RS-485 connections to minimize noise pickup in high-EMI environments.
- Maintain adequate clearance around the module to allow for proper thermal ventilation during operation.
FAQ
What protocols does the ASPRTU252 support?
The module supports Modbus RTU and Modbus ASCII protocols for serial communication.
How is the module powered?
The ASPRTU252 draws 550 mA of power directly from the 5 VDC rail of the Modicon Compact chassis backplane.
Does this module provide electrical isolation?
Yes, it features 1500 VAC galvanic isolation between the external serial data loops and the internal chassis logic.
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