What Is the BMXEHC0800?
The BMXEHC0800 is an 8-channel high-speed counter module from Schneider Electric’s Modicon X80 series. It captures fast pulse trains from incremental encoders and similar devices. Each channel counts independently, so one module handles eight separate motion or flow signals. The module draws 24 V DC through the backplane and consumes 3.6 W. It occupies a single slot, which keeps rack space free for other I/O. This makes it a practical choice when you need dense counting without expanding the chassis.
Key Parameters That Matter
8 Channels on One Slot
Eight counting channels in a single slot reduce rack footprint and wiring runs. You get more counting capacity per chassis than single-channel cards allow.
10 kHz Maximum Frequency
A 10 kHz ceiling suits many encoder feedback, flow meter, and production-counting tasks. Confirm your pulse rate stays below this limit before you commit.
Channel-to-Channel Isolation
Isolation between channels limits cross-talk when signals from different sources share one module. This helps protect measurement integrity in mixed-signal panels.
24 V DC Backplane Supply
The module takes 24 V DC through the backplane and draws 150 mA at that voltage. No separate field supply is needed for the module’s own operation.
Where the BMXEHC0800 Fits
Encoder Feedback on Packaging Lines
A packaging machine may run several conveyors, each with its own incremental encoder. The BMXEHC0800 counts pulses from each encoder and reports position or speed to the controller. Eight channels cover multiple axes from one slot.
Production Counting in Assembly Cells
Assembly cells often count parts at several stations at once. This module collects those counts and passes them to the PLC for reporting. Channel isolation keeps one noisy sensor from disturbing the rest.
Upgrade Path for Legacy Counting Cards
If you run older Modicon racks with aging counter cards, the BMXEHC0800 offers a current replacement path. It shares the X80 I/O platform used by M340 and M580 controllers. That shared platform simplifies spares planning across your installed base.
Installation and Setup Notes
Mount the module in a free X80 slot and confirm the backplane supplies 24 V DC. Keep field wiring separated from power conductors to reduce electrical noise. Because the module relies on backplane power, verify the rack power budget before adding it to a loaded chassis. Follow Schneider Electric’s installation documentation for wiring and grounding. Do not exceed the 0°C to +60°C operating range, and keep the enclosure within the 5% to 95% non-condensing humidity limit.
Reliability and Maintenance
With no moving parts, the BMXEHC0800 has little to wear out. Check the module status LED during routine panel inspections. Verify terminal tightness and inspect for dust buildup at the same interval. The IP20 rating means the module belongs inside a protected cabinet, away from moisture and metal dust. Store spare units between -25°C and +70°C. Following these steps protects your investment and avoids unplanned downtime.
Compatibility and Integration
The BMXEHC0800 belongs to the Modicon X80 I/O platform. This platform is shared between M340 and M580 controllers, so the same module works across both families. That commonality reduces the number of spare part types you must stock. Confirm your controller firmware and rack type support X80 I/O before purchase.
What to Verify Before You Buy
Check that your pulse sources stay within the 10 kHz limit. Confirm you have a free X80 slot and enough backplane current. Verify the 24 V DC supply is present in the rack. Decide whether eight channels match your channel count. The module measures 100 × 28 × 93 mm and weighs 0.17 kg, so plan panel depth accordingly. SpareTechPLC supplies this module and can confirm current availability. Please verify current lifecycle status and availability with SpareTechPLC before ordering.
Frequently Asked Questions
Does the BMXEHC0800 work with both M340 and M580 controllers?
Yes. It belongs to the Modicon X80 I/O platform, which both controller families share.
How many channels does this module provide?
It provides eight high-speed counting channels in a single slot.
What is the maximum counting frequency?
The module counts at a maximum frequency of 10 kHz per channel.
Does it need a separate field power supply?
No. It draws 24 V DC through the backplane and consumes 3.6 W.
Can I use it with incremental encoders?
Yes. Incremental encoder counting is the supported counting mode.
