Overview
The BEI 924-01002-3484 is a precision incremental optical encoder from the H25B series. This unit delivers rotary position feedback with 1000 cycles per revolution (1000 CPR), making it suitable for motion control, servo systems, and closed-loop automation applications. The encoder features triple-channel (A, B, Z) output with 7406R open collector logic and SM18 M-series connector for side-port wiring.
Key Features
- 1000 CPR resolution — precise rotary position measurement for servo and stepper feedback
- Triple-channel output (ABZ) — A and B channels for direction sensing; Z index pulse for reference
- 7406R open collector outputs — 70 mA max current sink, internal pullup resistors, compatible with TTL and industrial controller inputs
- SM18 connector — M18 circular connector for robust side-port termination
- Shaft seal design — enhanced protection in industrial environments
- LED optical sensing — reliable incremental encoder operation across temperature ranges
Technical Specifications
- Manufacturer: BEI Sensors (Sensata division)
- Part Number: BEI 924-01002-3484
- Model Designation: H25B-SS-1000-ABZC-7406R-LED-SM18
- Resolution: 1000 cycles per revolution (CPR)
- Channels: A, B, Z (triple-channel incremental output)
- Output Type: 7406R open collector with internal pullup (~100 Ω/volt)
- Output Current (Sink): 70 mA maximum
- Connector Style: SM18 (M18 circular, side-port)
- Shaft Design: Solid shaft with seal
- Sensing Technology: LED optical incremental
- Operating Voltage: 5–12 VDC typical (7406R driver); consult datasheet for exact rating
- Supply Current: ~100 mA typical, ~120 mA with active pullups
- Temperature Range: See extended range options in documentation
- Condition: Used, tested, fully functional
Typical Applications
- Servo motor feedback — closed-loop position and velocity control
- Stepper motor confirmation — verify stepper position in CNC and robotics
- Speed measurement — frequency output for tachometer applications
- Material handling — conveyor and gear indexing systems
- Assembly machinery — precision part positioning and counting
- Test equipment — motion verification and torque testing rigs
Compatibility & Replacements
Compatible With
- Industrial PLCs with ABZ incremental input modules (Allen-Bradley, Siemens, Mitsubishi, Omron)
- Motion control systems accepting TTL/7406R open collector logic
- Servo amplifiers with quadrature feedback inputs
- Counter modules and pulse-counting I/O cards
- Stepper motor controllers with position verification
- EtherCAT and PROFINET motion systems (via appropriate gateway modules)
Replaces / Drop-In Replacement For
- Other BEI H25B/H25D series 1000 CPR encoders with identical connector and output driver (verify part number suffix)
- Verify compatibility with your system integrator before ordering; connector and pinout variations exist across similar model ranges
Works With
- Software platforms: Studio 5000 (Allen-Bradley), TIA Portal (Siemens), Mitsubishi GX Works, Omron CX-Programmer
- Protocols: Quadrature (A/B/Z incremental) — native to PLC analog/digital input modules
- Output interface: 7406R open collector; requires pullup resistors or controller TTL inputs
- Typical configuration: Connect A, B, and Z channels to PLC high-speed counter or quadrature input module
