Product Overview
When a remote terminal unit fails in a distributed control architecture, every hour of downtime carries a real cost. The BMXNOR0200H from Schneider Electric is a Modicon X80 RTU serial module built to keep distributed I/O communicating in demanding plant environments. This single-slot module provides one RS232/RS485 serial port running Modbus RTU, and it carries a conformal coating for protection in harsh conditions. As an active part of the shared Modicon X80 I/O platform used across M340 and M580 systems, it remains a practical spare for oil, gas, and industrial automation installations.
Key Technical Specifications
The BMXNOR0200H draws its supply voltage of 24 V DC through the X-bus backplane, so it needs no separate field power connection. Power consumption sits at just 1.9 W, with a bus current of 80 mA at 24 V DC. That low demand matters when you are adding channels to an already loaded rack.
The built-in port supports both RS232 and RS485, giving engineers flexibility when connecting remote terminal units, meters, or third-party devices over Modbus RTU. One application channel and one slot occupation keep the footprint small, with dimensions of 100 × 28 × 93 mm and a weight of only 0.15 kg.
Environmental ratings support deployment in real plant conditions: operating temperature from 0°C to +60°C, storage from -25°C to +70°C, and relative humidity of 5% to 95% non-condensing. The IP20 protection rating suits cabinet-mounted installations, while the conformal coating adds defense against moisture, dust, and airborne contaminants.
Comparison with Similar Modules
| Feature | BMXNOR0200H | Standard Serial Module | Ethernet Gateway Module |
|---|---|---|---|
| Protocol | Modbus RTU | Modbus RTU | Modbus TCP |
| Port type | 1× RS232/RS485 | 1× RS232/RS485 | RJ45 |
| Conformal coating | Yes | No | Varies |
| Slot occupation | 1 slot | 1 slot | 1 slot |
| Supply | 24 V DC via backplane | 24 V DC via backplane | 24 V DC via backplane |
For distributed I/O over serial networks, the BMXNOR0200H offers a coated, compact option that fits the same X80 rack as standard modules.
Industry Applications
In oil and gas facilities, remote terminal units often sit far from the main controller. The BMXNOR0200H handles Modbus RTU communication over RS485, which suits long cable runs between field devices and the control room. The conformal coating helps where humidity and airborne contaminants are present.
Water treatment plants use distributed I/O to monitor pumps and valves across a wide site. A single-channel RTU module like this one can link a remote panel back to the main Modicon system without adding a full controller.
Manufacturing plants upgrading from older serial networks can drop this module into an existing X80 rack. Because it shares the platform with M340 and M580 controllers, integration is straightforward and spare parts stay common across the line.
Installation and Setup
The module mounts in a single X80 backplane slot and receives 24 V DC through the X-bus. No external power wiring is required for the module itself. Connect the RS232/RS485 device to the built-in port and configure Modbus RTU communication according to your system design. Keep the cabinet within the 0°C to +60°C operating range and maintain non-condensing humidity. Because the unit carries an IP20 rating, it belongs inside a protective enclosure.
Maintenance and Reliability
The conformal coating reduces the impact of moisture and contaminants, which supports longer service intervals in harsh areas. Inspect the module periodically for loose connections and verify that cabinet cooling keeps temperatures within the rated range. The low 1.9 W power draw limits heat buildup inside the rack. For buyers managing spares, keeping one BMXNOR0200H on the shelf avoids long lead times when a remote link goes down. Oil AutoTech offers fast-dispatch spares for oil, gas, and industrial automation, with quick worldwide delivery and hands-on technical selection help.
Selection Guide
Before ordering, confirm your controller platform supports the Modicon X80 series and that your network uses Modbus RTU over RS232 or RS485. Check that your cabinet provides 24 V DC backplane supply and stays within the operating temperature range. Verify the single-channel count matches your application. If you need help matching this module to your existing rack, contact Oil AutoTech today for pricing and availability.
Frequently Asked Questions
Q: What protocol does the BMXNOR0200H support?
A: It supports Modbus RTU over one built-in RS232/RS485 serial port.
Q: Does this module require external power?
A: No. It receives 24 V DC through the X-bus backplane and consumes 1.9 W.
Q: Is the BMXNOR0200H suitable for harsh environments?
A: Yes. It carries a conformal coating and operates from 0°C to +60°C at 5% to 95% non-condensing humidity.
Q: Which controllers work with this module?
A: It belongs to the Modicon X80 shared I/O platform used with M340 and M580 systems.
Q: How many channels does it provide?
A: One application channel, occupying a single slot.
