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Schneider Electric ILS1R851PB1A0

Schneider ILS1R851PB1A0 Lexium Integrated Stepper Motor, 6 poles, 24 V DC

MPNILS1R851PB1A0
Obsolete

Schneider ILS1R851PB1A0 Square D Integrated Drive/Motor — now discontinued. Supplied from remaining channel stock; full specifications, lifecycle and same-series options are below.

$901.00 – $1,770.00Ref. price · indicative, final on quote
Schneider Electric ILS1R851PB1A0 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

ILS1R851PB1A0 key specifications
ParameterValue
Motor type3-phase stepper motor
Network typeDC
Winding typeMedium speed of rotation and medium torque
Feedback typeIndex pulse
Gear box typeWithout
Protection typeOverload of output voltage Short circuit of the output voltage Safe torque off
Type of coolingNatural convection
Range of productLexium integrated drive
Input (output type)4 signals (each be used as input or output)
Product or component typeMotion integrated drive
Supply voltage limits18...40 V
Discrete output voltage23...25 V

All specifications

ILS1R851PB1A0 additional specifications
ParameterValue
Supply voltage24 V 36 V
Voltage state 0 guaranteed-3...4.5 V
Voltage state 1 guaranteed15...30 V
Current consumption5000 mA maximum
Discrete input current10 mA at 24 V on/STO_A safety input 3 mA at 24 V on/STO_B safety input 2 mA at 24 V 24 V signal interface
Maximum switching current100 mA per output 200 mA total
Number of motor poles6
PhasesSingle phase
IP degree of protectionIP41 shaft bushing: conforming to EN/IEC 60034-5 IP54 total except shaft bushing: conforming to EN/IEC 60034-5
Communication interfaceRS485, Integrated
Mounting supportFlange
Mounting holes diameter0.3 in (6.5 mm)
Number of mounting holes4
Circle diameter of the mounting holes3.9 in (99 mm)
Electrical connectionPrinted circuit board connector
Shock resistance150 m/s² 1000 shocks EN/IEC 60068-2-29
Relative humidity15...85 % without condensation
Operating altitude<= 3280.84 ft (1000 m) without derating
Vibration resistance20 m/s² 10...500 Hz) 10 cycles EN/IEC 60068-2-6
Centring collar depth0.08 in (2 mm)
StandardsIEC 60072-1 EN/IEC 50178 EN 61800-3 : 2001-02 EN 61800-3:2001, second environment EN/IEC 61800-3 EN 50347 IEC 61800-3, Ed 2
Length5.5 in (140.6 mm)
MarkingCE
CategoryUS1PC5618288
Shaft endUntapped
Second shaftWithout second shaft end
Shaft length1.2 in (30 mm)
Holding brakeWithout
Nominal speed200 rpm 24 V 400 rpm 36 V
Rotor inertia1.1 kg.cm²
Accuracy error+/- 6 arc min
Holding torque17.7 lbf.in (2 N.m)
Nominal torque17.7 lbf.in (2 N.m)
Shaft diameter0.5 in (12 mm)
Device short nameILS
Motor flange size3.3 in (85 mm)
Peak stall torque17.7 lbf.in (2 N.m)
Transmission rate9.6, 19.2 and 38.4 kbauds
Service life in hours20000 h bearing
Associated fuse rating10 A
Maximum axial force fa170 N tensile force) 30 N force pressure)
Number of motor stacks1
Continuous stall torque17.7 lbf.in (2 N.m)
Maximum radial force fr100 N
Centring collar diameter2.4 in (60 mm)
Maximum mechanical speed2000 rpm
Speed feedback resolution20000 points/turn
Ambient air temperature for storage-13...158 °F (-25...70 °C)
Ambient air temperature for operation122...149 °F (50...65 °C) (with power derating of 2 % per °C) 32...122 °F (0...50 °C) (without derating)
Permissible ambient air temperature around the device221 °F (105 °C) power amplifier 230 °F (110 °C) motor

Product details

Overview

The ILS1R851PB1A0 is a Schneider Lexium integrated drive — a 3-phase stepper motor with 6 poles, rated for 24 V DC single-phase supply, delivering 2 N.m holding torque. It carries an IP41 enclosure rating and mounts via flange, with RS485 communication onboard.

This integrated drive combines a 3-phase stepper motor and controller in one housing, eliminating separate cabling and panel space for a drive module. The 6-pole rotor gives a medium-speed, medium-torque profile suited for positioning tasks where holding torque at standstill matters more than high-speed run. RS485 communication at 9.6, 19.2 or 38.4 kbauds handles motion commands and feedback via the index pulse output. The 2 N.m holding torque (17.7 lbf.in) is the figure that sizes the load it can stop and hold without a brake — the unit ships without a holding brake, so vertical-axis applications need external braking. Protection circuits cover overload of output voltage, short circuit of the output voltage, and safe torque off. Rotor inertia is 1.1 kg.cm² and winding resistance 20.0 ohms, both figures that affect acceleration and thermal behaviour under repeated start-stop cycles.

Within Schneider's Lexium integrated drive range, the ILS1R851PB1A0 sits as a medium-torque, medium-speed variant. It competes with other integrated stepper drives in the 2 N.m class, offering the convenience of a single order code that includes motor, encoder and drive electronics.

The ILS1R851PB1A0 is an active product in Schneider's current catalog. No end-of-life or phase-out notice has been published for this order code as of the latest available data. Sourcing is through standard distribution channels; lead time is typically confirmed on a per-quote basis.

Pricing & sourcing

Indicative pricing for the ILS1R851PB1A0 is an estimate for budgeting only, subject to a firm RFQ quote. As an active integrated drive it is normally stocked by major Schneider distributors.

MPN
ILS1R851PB1A0