At a glance: what this backplane does
The Modicon X80 BMXXBP0400H is a 4-slot ruggedized backplane — think of it as the spine for your X80 I/O rack, carrying power and bus signals between modules in harsh environments. It draws only 1.12 W from the rack supply, which is good to know when you're budgeting the power budget for a cabinet full of cards. The backplane accepts a single expansion connector (XBE) for linking additional racks when you need more than four slots.
Where this part earns its keep
This is an active part — no phase-out or last-time-buy drama. The lifecycle status shows it's current, so you can quote it into a BOM with confidence. It's designed for severe environments: conformal coating protects against moisture and contaminants, and the operating range goes from -25 to 70 °C. Standards compliance includes EN/IEC 61131-2, UL 61010-2-201, CSA, ATEX directive (2014/34/EU), and even ISA S71.04 gas resistance Gx. You also get IEC 60721-3-3 class 3C4 for corrosive gases, 3S4 for dust and sand, plus salt and mold resistance. Safe for Class I Division 2 hazardous locations.
Mounting and mechanical notes
Dimensions: 242.4 mm wide, 103.7 mm tall, and only 19 mm deep — so it doesn't steal much cabinet space behind the panel. That 19 mm depth is the deepest point; the connectors sit within that. When you're laying out the subpanel, leave a little clearance above and below for the DIN rail clips if you use them. IP20 rated; use inside a closed cabinet. Relative humidity 10–95% without condensation.