Is Your Control Panel Ready for Mixed AC and DC Loads?
Engineers often struggle to find one output module that can switch both AC and DC field devices without adding extra hardware. The BMXDRA0804T from Schneider Electric solves that problem. This Modicon X80 discrete output module gives you eight relay channels in a compact package.
What Is the BMXDRA0804T?
The BMXDRA0804T is an 8-channel relay output module from the Schneider Electric Modicon X80 series. Each channel uses an SPDT relay contact. The module accepts a field supply of AC or DC power and handles a range of 5-240 V AC or 5-30 V DC. Per-channel LED diagnostics show output status at a glance. Channel-to-channel isolation protects your process from cross-talk between loads.
Key Parameters That Matter
| Specification | Value |
|---|---|
| Channels | 8 |
| Signal type | Relay output (SPDT) |
| Range | 5-240 V AC / 5-30 V DC |
| Isolation | Channel-to-channel |
| Diagnostics | Per-channel LED |
| Connection | 20-pin terminal block |
| Power consumption | 2.2 W |
| Bus current | 90 mA @ 24 V DC |
| Operating temperature | 0°C to +60°C |
| Protection rating | IP20 |
| Dimensions (H×W×D) | 100 × 28 × 93 mm |
| Weight | 0.18 kg |
Why Channel-to-Channel Isolation Matters
Isolation keeps one faulty field circuit from affecting its neighbors. In a busy cabinet, a short on one relay channel can disturb other outputs without isolation. The BMXDRA0804T isolates each channel, so a single fault stays contained. This design supports higher uptime and simpler troubleshooting.
Where This Module Fits
The Modicon X80 platform serves both M340 and M580 controllers. That shared platform means you can standardize spare parts across different machine lines. Typical uses include:
- Packaging lines that switch AC solenoids and DC indicator lamps from one module.
- Water treatment panels where relay outputs drive pumps and valves at mixed voltages.
- Material handling systems that need visible per-channel status during changeovers.
Installation and Setup
The module mounts in a Modicon X80 rack and connects through a 20-pin terminal block. Keep the cabinet within the 0°C to +60°C operating range. Maintain 5% to 95% relative humidity, non-condensing. The IP20 rating protects against solid objects, so install the module inside a closed enclosure. Route field wiring away from high-noise sources to protect relay contacts.
Maintenance and Reliability
Relay contacts are mechanical parts, so they wear over time. Inspect terminals periodically for loose connections and signs of heat. Check the per-channel LEDs during routine rounds; a missing LED indication points to a wiring or supply issue. Keep spare modules on hand to cut replacement lead time. The BMXDRA0804T remains an active part on the shared X80 platform, so long-term support looks stable. Please verify current lifecycle status and availability with SpareTechPLC before ordering.
Compatibility and Integration
The module works inside Modicon X80 racks used by M340 and M580 controllers. The 20-pin terminal block carries field wiring, while the backplane supplies 90 mA at 24 V DC. Power consumption stays at 2.2 W, which keeps cabinet heat low. Because the platform is shared, you can reuse the same I/O configuration across both controller families.
What to Verify Before You Buy
Confirm your rack type and controller family first. Check that your field loads fall within 5-240 V AC or 5-30 V DC. Count your output points; eight channels may not cover large panels. Verify that your wiring matches the 20-pin terminal block layout. SpareTechPLC supplies genuine Schneider Electric automation parts and can help you confirm fit.
Frequently Asked Questions
Can I mix AC and DC loads on one BMXDRA0804T?
Yes. Each relay channel handles 5-240 V AC or 5-30 V DC, so mixed loads work on the same module.
Does this module report channel faults?
It provides per-channel LED diagnostics. These LEDs show output status for fast visual checks.
Which controllers support this module?
It runs in Modicon X80 racks shared by M340 and M580 controllers.
What is the power draw from the backplane?
The module draws 90 mA at 24 V DC and consumes 2.2 W.
Is the BMXDRA0804T still available?
The data lists it as active on the shared X80 platform. Contact SpareTechPLC to confirm stock.
