What the ratings mean for your BOM line
The 6ES7138-7FA00-0AB0: Supply current draw is 25 mA from the backplane plus 4 mA per active channel. The internal power bus provides up to 490 mA. SIL 3, PL e. Diagnostic alarms: wire-break, short-circuit, group error (SF LED). Short-circuit proof per channel. ATEX marking II 2 G (1) GD Ex ib[ia Ga][ia IIIC Da] IIC T4 covers use in Zone 2 gas and dust atmospheres with ex ib protection. No separate intrinsic safety barrier needed for the module itself when installed in the correct zone. Integration time is parameterizable in four stages: low (4× cycle time), medium (16×), high (64×), and off (1×). Adjust per channel to trade noise rejection against update speed – the shorter times for fast loops, longer for high accuracy on slow processes.
Sourcing reality and RFQ posture
Compliance documentation: CE mark, ATEX II 2 G, SIL 3 certificate, PL e declaration. All available as part of the standard documentation package with the module.