What it is and why it matters for your BOM
The 6ES7138-4FA00-0AB0: Worst-case power draw is 4 W, which fits within the ET200S backplane budget for a standard mixed I/O station.
Safety ratings — what they mean for your machine circuit
The diagnostics function and group error LED (red SF indicator) simplify fault isolation on the line — no need for extra status modules in the ET200S station.
DIN rail footprint and wiring
At 30 mm wide and 52 mm deep (excluding connector), the module takes up one standard ET200S slot. Panel cutout planning should account for the 81 mm height and the backplane bus connector that mates with adjacent modules. Output voltage type is L+ (-1.5 V) with electronic short-circuit protection triggering between 0.7 A and 1.8 A. There is no reverse polarity protection on the load side, so verify wiring before power-up. Input-to-backplane isolation is provided, but no isolation between channels or between channels and load voltage L+ — keep this in mind for grouping sensors from different power sources.