Lexium ILS in one line
ILS1F851S1366 is a Lexium integrated drive from Schneider Electric, combining a 3-phase stepper motor and controller in one 85 mm flange unit with a CE marking. The device runs on a single-phase AC-fed DC bus supply, with supply limits of 18 to 40 V, so the cabinet-side PSU sits comfortably in the 24 V or 36 V nominal windows shown on the speed/torque table.
Torque, speed, and what the winding actually delivers
Holding torque is 53.1 lbf.in (6 N.m) with the holding brake engaged and 17.7 lbf.in (2 N.m) with the brake released, so the brake is what carries the static load, not the motor alone. Nominal speed is 200 rpm at 24 V and 400 rpm at 36 V, with nominal torque 17.7 lbf.in (2 N.m) and peak stall torque 17.7 lbf.in (2 N.m) — the winding is the medium-speed, medium-torque variant, sized for indexing tables and light conveyor duty rather than high-throughput spindle work.
Brake, protection, and STO
The integrated holding brake pulls in at 22 W and releases in 40 ms, which is the figure the safety circuit budget has to clear before the next motion command — a slow release shows up as a position lag on the first move after enable. Built-in protection covers output overvoltage, output short-circuit, and safe torque off, with a +/- 6 arc min positioning accuracy on the index pulse feedback, so the drive can hold position between moves without a separate encoder in light duty.
EMC, environment, and what the standards buy you
The ILS line is qualified to IEC 61800-3 in the second environment for EMC, plus IEC 50347, IEC 60072-1, and IEC 50178 — the second-environment classification means it is intended for installation in industrial sites with their own dedicated supply, not for direct connection to a domestic low-voltage network. Mechanical robustness is rated to IEC 60068-2-29 at 150 m/s² for 1000 shocks and IEC 60068-2-6 at 20 m/s² over 10 to 500 Hz, so the unit tolerates panel-mounted vibration without the feedback losing index on each cycle. Operating altitude limit is 3280.84 ft (1000 m) without derating, and humidity is rated 15 to 85 % without condensation, which is the envelope an enclosure with basic climate control will hold in a typical control cabinet.
Mechanical footprint and wiring side
The 85 mm flange, 12 mm shaft diameter, and 30 mm shaft length match the standard NEMA-compatible integrated-drive mounting pattern; the shaft is untapped with no second shaft end, so any coupling or pulley is clamp- or shrink-fit only. Wiring terminates through an industrial connector on the back face rather than a terminal strip, with 4 signals each usable as input or output — the panel wireman only needs the mating cordset, not a screwdriver, to land I/O. Cooling is natural convection only, with a maximum current consumption of 5000 mA — the cabinet layout has to keep clear space around the housing, because there is no fan to push air across the heatsink.
Procurement posture and supply
Cross-border buyers should expect the same part to surface from multiple authorised regional channels — genuine is genuine, but the warranty footprint follows the issuing region's terms, and that is the line item a parallel-import desk has to disclose up front.