What the ILS1B851PB1F0 actually drives
The ILS1B851PB1F0 sits inside Schneider's Lexium integrated drive (ILS) family, combining a 3-phase stepper motor with on-board drive electronics so a single module carries both the power stage and the motion controller. It is wired through a printed circuit board connector and uses four signals configurable as inputs or outputs for end-of-travel limits, enable, fault, or pulse direction depending on the host controller. Power enters as a DC bus on a single-phase architecture; the part carries CE marking and is designed to EN/IEC 61800-3 (second environment) plus EN/IEC 50178, which is the industrial drive EMC and insulation book. Practically, that means the module is meant to live inside a machine cabinet, not on the open factory floor, and it should be grounded through the PCB connector shield path the way the integration manual specifies.
Torque, speed, and the holding brake
The integrated holding brake pulls in with 22 W and releases in 40 ms; with a 6 N·m holding figure the brake is sized for the same shaft load the motor produces, so axis sizing is a single envelope rather than a motor-plus-brake pair. Index-pulse feedback gives homing accuracy to ±6 arc minutes, which is the figure that matters when this drive is paired against a reference mark in a registration cut.
Safety functions and EMC envelope
Current consumption is capped at 5000 mA maximum and cooling is by natural convection only, so the cabinet layout must keep the surrounding free-air space the integration manual calls out. Mechanical environment is rated to EN/IEC 60068-2-6 vibration (20 m/s² across 10–500 Hz for 10 cycles) and 60068-2-29 shock (150 m/s² for 1000 shocks), with 15–85% non-condensing humidity and 1000 m altitude without derating — a typical indoor panel envelope, not a washdown or outdoor deployment.
Mechanical fit into the machine frame
The 85 mm flange is the standard NEMA 23-class footprint for this class of integrated drive, with a 7.4 in (187.3 mm) body length, 12 mm shaft diameter, 30 mm shaft length, and untapped shaft end. Centring collar depth is 0.08 in (2 mm) — the small clearance that drives whether a customer can reuse an existing mounting plate or needs a new adapter. There is no gearbox, no second shaft end, and no integrated gear option on this code. Communications ride on a multi-drop RS-485-style link supporting 9.6, 19.2, 45.45, 93.75, 187.5, 500, 1500, 3000, 6000, and 12000 kbauds; that ladder is the Lexium ILS default, and the right rate is whichever matches the host motion controller's bus cycle — not the highest number on the list.
Sourcing posture for the BOM line
CE compliance and the EN/IEC 61800-3 (second environment) conformance are the approvals a European machine builder will ask for at the declaration of conformity step.