Why the BMXEIA0100 Belongs in Your Modicon X80 Rack
Engineers replacing legacy serial communication cards often face a familiar problem: the old module is obsolete, documentation is thin, and the replacement must drop into an existing M340 or M580 rack without re-engineering the panel. The Schneider Electric BMXEIA0100 solves that problem directly. It is a Modicon X80 serial communication module that occupies one slot on the X-bus backplane and provides a single RS232/RS485 channel for point-to-point communication. Because it shares the X80 I/O platform with both M340 and M580 controllers, it gives you a clean upgrade path instead of a dead end.
What the BMXEIA0100 Actually Does
This module handles serial data exchange between your controller and field devices. It supports Modbus RTU, Modbus ASCII, and character mode, so it can talk to drives, weigh scales, barcode readers, and older intelligent instruments that still rely on serial links. The built-in port is configurable as either RS232 or RS485, which means one module covers short point-to-point runs and longer multi-drop segments. Baud rates from 0.3 to 19.2 Kbps cover the slow, deterministic protocols common in process and utility environments.
Key Specifications at a Glance
| Parameter | Value |
|---|---|
| Model | BMXEIA0100 |
| Brand | Schneider Electric |
| Series | Modicon X80 |
| Type | Serial communication module |
| Built-in ports | 1× RS232/RS485 |
| Protocols | Modbus RTU/ASCII, character mode |
| Baud rate | 0.3–19.2 Kbps |
| Slot occupation | 1 slot |
| Supply voltage | 24 V DC (via backplane) |
| Power consumption | 1.7 W |
| Bus current | 70 mA @ 24 V DC |
| Operating temperature | 0°C to +60°C |
| Storage temperature | -25°C to +70°C |
| Relative humidity | 5% to 95% (non-condensing) |
| Protection rating | IP20 |
| Backplane | X-bus |
| Dimensions (H×W×D) | 100 × 28 × 93 mm |
| Weight | 0.15 kg |
| Lifecycle | Active (shared I/O platform for M340 and M580) |
The Practical Meaning of These Ratings
The 24 V DC supply through the backplane means no separate power wiring to the module, which reduces installation time and cabinet clutter. At 1.7 W and 70 mA bus current, the electrical load is modest, so you can add the BMXEIA0100 to a populated rack without recalculating the power budget aggressively. The 100 × 28 × 93 mm footprint and 0.15 kg weight keep panel density high. An IP20 rating tells you this module belongs inside a protected enclosure, not on an open machine frame. The 0°C to +60°C operating range suits most control rooms and air-conditioned cabinets, while the -25°C to +70°C storage range supports spare-part stocking in unheated warehouses.
Where This Module Earns Its Place
Consider a water treatment plant running a Modicon M340 controller. The plant needs to read flow totalizers over Modbus RTU. The BMXEIA0100 provides that serial channel without adding a gateway or a second network. In a packaging line, the same module can poll a barcode scanner in character mode and pass the data to an M580 controller. For system integrators modernizing an older panel, the X80 platform compatibility means the module fits the same rack and uses the same backplane as existing I/O, so the upgrade is mechanical and electrical, not architectural.
Installation and Commissioning Notes
Mount the module in any free X-bus slot and confirm the backplane connection is seated. Configure the port as RS232 or RS485 according to your field device, then set the baud rate within the 0.3–19.2 Kbps range and select Modbus RTU, Modbus ASCII, or character mode. Keep serial cabling away from variable-frequency drive output cables to reduce noise. Because the module draws power from the backplane, verify the rack power supply has adequate headroom before adding it to a fully loaded rack.
Maintenance and Long-Term Reliability
This module has no moving parts, so wear is minimal. Inspect the slot and connector periodically for dust or corrosion, and confirm the enclosure maintains the IP20 environment. Keep ambient temperature within 0°C to +60°C and humidity within 5% to 95% non-condensing. For spare-part planning, the active lifecycle status means the platform remains supported, which protects your investment and reduces the risk of forced redesign.
Compatibility and Integration
The BMXEIA0100 integrates with Modicon M340 and M580 controllers through the X80 platform. It communicates over the X-bus backplane and supports Modbus RTU, Modbus ASCII, and character mode over its RS232/RS485 port. This makes it suitable for connecting serial field devices to a modern controller architecture without protocol converters.
What to Verify Before You Buy
Confirm your controller platform accepts X80 modules and that you have a free slot. Check whether your field device needs RS232 or RS485, and verify the required baud rate falls within 0.3–19.2 Kbps. Decide whether Modbus RTU, Modbus ASCII, or character mode matches the device protocol. If you need a reliable source, SpareTechPLC supplies industrial automation parts and can help confirm availability. Please verify current lifecycle status and availability with SpareTechPLC before ordering.
Frequently Asked Questions
Can the BMXEIA0100 work in both M340 and M580 racks?
Yes. Schneider Electric lists it as part of the shared Modicon X80 I/O platform for M340 and M580 controllers, so it fits both architectures.
Does this module support RS485 multi-drop networks?
It provides one RS232/RS485 port. RS485 mode supports multi-drop wiring, while RS232 suits point-to-point links.
What protocols can I run on this serial module?
The module supports Modbus RTU, Modbus ASCII, and character mode, covering common industrial serial devices.
How much rack power does it consume?
It draws 1.7 W and 70 mA at 24 V DC from the backplane, so the load on the rack supply is low.
Is the BMXEIA0100 still an active product?
Yes. The lifecycle status is active, with the platform shared across M340 and M580. Confirm availability with SpareTechPLC before ordering.
