Overview
It operates on a 36 V DC supply, delivers 2 Nm of holding torque, and is rated IP41 for in-cabinet use with flange mounting. The unit carries CE marking and is designed for pulse/direction control at 24 V or 36 V logic levels, with 6 poles and a rotor inertia of 1.1 kg·cm².
This integrated drive accepts pulse/direction signals at 24 V or 36 V to position the motor shaft with an accuracy of ±6 arc minutes. The 2 Nm holding torque suits direct-drive applications where a separate gearbox is omitted — the unit ships without a gearbox and without a holding brake. The motor winding resistance is 20.0 Ω, and the rotor inertia of 1.1 kg·cm² defines the acceleration profile for load matching. Feedback is via an index pulse, adequate for open-loop stepper positioning where encoder resolution is not required. Protection circuits cover overload and short circuit of the output voltage, plus safe torque off (STO) for emergency-stop integration. Natural convection cooling keeps the package compact — no forced air required.
Applications
Lexium integrated drives of this class are used in compact motion axes for packaging, labeling, pick-and-place, and small conveyor indexing where space is tight and a separate drive cabinet is undesirable. The single-phase 36 V DC supply simplifies wiring in distributed machine architectures.
Within Schneider's Lexium range the ILS1U851PB1A0 sits in the integrated drive family — a stepper motor with onboard drive electronics, eliminating the cable harness and panel space a separate drive would require. It targets OEM machine builders who need a pre-validated motion subassembly with a single order code.
The ILS1U851PB1A0 carries CE marking and is designed to EN 61800-3:2001 for the second environment (industrial power networks). Compliance documentation includes standards EN 60072-1, EN 50347, EN 50178, and IEC 61800-3 Ed 2. The unit is not marked as obsolete in the current catalog; confirm current lead time and minimum order on the RFQ.