Control Techniques 075E3D300BACAA Rotary Encoder Unit

Module Feature

075E3D300BACAA (part number 075140) is a high resolution optical rotary encoder manufactured by Control Techniques,specially designed for servo motor closed-loop position feedback. It adopts non-contact optical grating sensing technology to convert mechanical shaft rotation into digital quadrature pulse signals. RS-422 differential A/B/Z phase output provides strong anti-electromagnetic interference capability,stable signal transmission for long cable runs in industrial servo cabinets. Metal shield housing isolates interference from high-power drive circuits. Built-in BIT diagnostic circuit continuously monitors power supply and optical signal path integrity; fault information can be read through Control Techniques drive configuration software. Reinforced bearing structure provides excellent shock and vibration resistance,widely used in industrial servo axis control,automation test bench and hardware-in-loop real-time simulation chassis.

Working principle

The grating disc rotates synchronously with servo motor shaft. Infrared LED light penetrates grating slits and is received by photodiode array,generating A/B quadrature pulses for speed and direction calculation and Z index pulse for origin homing. RS-422 differential line driver transmits these feedback signals to the servo drive. BIT circuit detects LED luminous intensity and power rail voltage to identify hardware failure. Metal shield suppresses EMI coupling from high-current power wiring.

Onboard components

Infrared LED light source,precision optical grating disc,photodiode receiver array,RS-422 differential line driver,metal shielding enclosure,precision shaft bearing assembly,multi-pin feedback connector,BIT power and optical signal detection hardware.

LED indicators

LED indicators for power status and BIT fault alarm.

Hardware self-diagnosis

Visual inspection of housing,shaft and connector;BIT power supply and optical signal amplitude test;A/B/Z phase waveform verification;shaft rotation smoothness check.

Programming software

Control Techniques Unidrive Tools software,supports encoder parameter setup,position signal monitoring and BIT fault log reading.

Electrical & Process Parameters

Model:075E3D300BACAA 075140 Brand: Control Techniques Device type: Servo optical quadrature rotary encoder Power supply:5 V DC Signal output:RS-422 differential A/B/Z quadrature signal Shaft type:Solid shaft Control mode:Non-contact optical position measurement,differential signal transmission,metal EMI shielding,built-in BIT health monitoring Cooling: Natural convection cooling Protection: Reverse polarity protection,metal housing mechanical protection Mounting: Flexible coupling connected to servo motor shaft Protection class: Metal sealed housing

Mechanical & Structure

Mounting: Servo motor shaft flexible coupling mounting Protection class: Metal shield housing

Environmental

Operating temperature:-40℃ ~ +85℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:20~80% non-condensing Certification: CE compliant Status: Control Techniques high-precision optical quadrature encoder for servo closed-loop feedback

Installation

Follow ESD safety procedure before handling.Align encoder shaft with servo motor shaft and install flexible coupling.Tighten coupling screws properly,avoid excessive radial or axial load.Connect 5 V DC power and differential A/B/Z feedback cable to Control Techniques servo drive feedback port.Power on system,open Unidrive Tools,run BIT diagnostic before commissioning.

Interface

Multi-pin feedback connector for 5 V power,ground and A/B/Z differential quadrature signals.

Diagnostic

No pulse output: 5 V power loss,loose connector or failed LED source. Reverse rotation direction: A and B phase wires swapped. Missing Z reference pulse: grating disc contamination or Z channel circuit damage. Jittery position reading: insufficient shielding or ground loop noise.

Product Brief

Control Techniques 075E3D300BACAA (075140) servo optical rotary encoder,RS-422 differential A/B/Z quadrature output,metal EMI shielding and built-in BIT self-check,provides reliable high-precision shaft position feedback for Control Techniques servo drives and hardware-in-loop simulation systems.