The BMXDAO1615H: Each channel is isolated from the backplane and from each other; no shared commons beyond the 4 A per common group limit. The module draws 61 mA from the 3.3 V rail and 50 mA from the 24 V backplane supply, so power budget in the rack is modest.
Built for severe environments
This module carries a conformal coating and is rated for gas (Gx, 3C4), dust (3S4), sand (3S4), salt (level 2), and mold (3B2) resistance. Operating temperature spans -25…70 °C, storage -40…85 °C, and it shrugs off 30 gn shock and 3 gn vibration. That's a module you can drop into a water treatment plant, a steel mill, or an offshore skid without second-guessing the environment.
Key ratings to watch when sizing
Per-channel current: 1.2 A at 60 °C, derated to 0.6 A at 70 °C. Module total: 4 A at 60 °C, 2 A at 70 °C. Off-state leakage climbs with supply voltage — 1 mA at 24 V, 2.5 mA at 240 V — so if your load needs true zero-power when off, factor in that bleed. Response time is ≤10 ms for resistive deactivation, fast enough for medium-speed on/off control but not for PWM. Inrush current is 30 A, so a single fast-blow 4 A fuse per channel (external, not integrated) protects the triac. A varistor on each output handles overvoltage spikes from inductive kicks — no external snubber needed for typical motorized valve or contactor coils. Dielectric strength is 3000 V AC for 1 minute between output and backplane — solid isolation for environments with high common-mode noise.
Physical and diagnostic fit
Status LEDs: one green RUN LED for module operational, one red ERR LED for module error, one green LED per channel for channel diagnostics. That's enough to ring out a dead output at the cabinet door without a laptop. IP20 front, conformal coated board — mounts in any Modicon X80 rack slot, takes up one position. Power dissipation is only 1.45 W typical, so no forced air needed even in a densely packed rack at 60 °C.
A note on the rating labels
Absolute altitude limit: 2000 m full rating, 2000…5000 m with derating. If your site is above 2000 m, let me know — we'll recalculate headroom.
