Schneider Electric BMXXBP0400 is a 4-slot backplane for the Modicon M340 automation platform, also listed under the Modicon X80 range. It's the rack that holds your CPU, I/O, and comms modules — plain and simple. At 19 mm deep, it's a shallow profile that fits tight enclosures when you're stacking a liquidation lot of M340 gear.
Mounting & Panel Fit
Mounts by clips on 35 mm symmetrical DIN rail or by four M4/M5/M6 screws to a panel or mounting plate. That gives you flexibility — rack it on the rail for quick swaps or screw it flat for vibration resistance. Dimensions: 242.4 mm wide, 103.7 mm tall, 19 mm deep. The depth is the standout — barely a finger's width behind the panel. Pairs neatly with X80 modules that also sit shallow.
Compliance & Environment
Certified to EN/IEC 61131-2, EN/IEC 61010-2-201, UL 61010-2-201, CSA C22.2 No 61010-2-201, IACS, and EN/IEC 61000-6-5 (interface types 1 & 2) plus EN/IEC 61850-3 (location G). Also compliant with Low Voltage Directive 2014/35/EU and EMC 2014/30/EU. That covers most industrial and utility substation applications out of the box. Rated IP20, 0 to 60 °C ambient, 10–95% relative humidity non-condensing. Power draw is 1.12 W — negligible in the panel budget.