The BMXDRC0805H is a Modicon X80 relay output module with 8 outputs rated for 5...150 V DC and 19...264 V AC. It carries external short-circuit, overload, and overvoltage protection for both AC and DC networks — meaning fewer external fuses or snubbers per channel. Conformal coating and a -25...70 °C operating range qualify it for severe environments where humidity, corrosive gas, or dust would kill a standard module.
Protection and diagnostics at the channel level
Each of the 8 relay outputs includes channel diagnostic LEDs (green per channel, red ERR, red I/O) alongside a green RUN LED. The protection scheme — short-circuit per fuse recommendation, overload, and overvoltage — is the same footprint whether you switch AC or DC loads. For AC outputs use a RC snubber or ZNO surge limiter; for DC outputs use a flyback diode per the application note. The module's conventional free-air thermal current derates from 4 A at 40 °C to 1.2 A at 70 °C, so you size the load based on the highest panel ambient.
