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 offloads communication tasks from the main processor, managing protocol execution and telemetry routing to ensure deterministic data flow in distributed industrial environments. By handling serial traffic independently, the ASPRTU252 maintains system stability and prevents bus timeouts in critical infrastructure such as power substations, pipeline monitoring, and mining facilities.
Features
Dedicated co-processor architecture for independent protocol parsing and transmission.
Dual selectable RS-232/RS-485 serial interfaces for flexible field connectivity.
Galvanic isolation rated at 1500 VAC to protect backplane logic from field-side electrical surges and ground loops.
Front-panel LED indicators for immediate visual monitoring of transmit/receive activity and diagnostic status.
Optimized for Modbus RTU and Modbus ASCII protocol standards.
Applications
This module is ideal for applications requiring reliable remote data acquisition and long-distance serial communication. It is frequently deployed in:
Petroleum and gas pipeline telemetry networks.
Unmanned thermal and hydroelectric power substations.
Remote mining and material extraction facility control systems.
Wide-area industrial infrastructure requiring high electromagnetic noise immunity.
Technical Specifications
Model
ASPRTU252
Brand
Schneider Electric
Power Consumption
550 mA at 5 VDC (from backplane)
Supported Protocols
Modbus RTU, Modbus ASCII
Communication Ports
2 x RS-232/RS-485 (selectable)
Max Baud Rate
19.2 Kbps per channel
Isolation
1500 VAC (field-to-bus)
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 system power is disconnected before installing or removing the module from the Modicon Compact chassis.
Mount the module in a standard slot on the backplane, ensuring the connector pins are aligned and fully seated.
Use shielded twisted-pair cabling for RS-485 connections to minimize EMI impact in high-noise environments.
Verify that the port selection (RS-232 vs RS-485) matches the field device configuration before applying power.
Maintain proper ventilation within the cabinet to stay within the 0 to 60 deg C operating range.
FAQ
What communication protocols does the ASPRTU252 support?
The module natively supports Modbus RTU and Modbus ASCII protocols for seamless integration with standard Modicon Compact systems and third-party telemetry equipment.
Is the ASPRTU252 electrically isolated?
Yes, the module features dual galvanic isolation with a 1500 VAC barrier, protecting the internal backplane logic from transient surges and ground potential differences found in field wiring.
