BEI Sensors S20A-177U-UUUA Absolute Value Rotational Encoder

Product Description

BEI Sensors S20A-177U-UUUA is a heavy-duty compact absolute rotary encoder from S20A series. It adopts single-turn absolute optical encoding with serial digital output. Suffix codes define customized shaft type, electrical interface and environmental protection. It features high vibration & shock resistance and wide operating temperature range for precise angle and position measurement. With metal housing and sealed construction, it is designed for harsh industrial environments for angle positioning, speed feedback and closed-loop position control. Widely used as position feedback spare parts for cranes, paper machines, metallurgical equipment and servo systems.

Specifications

• Model: S20A-177U-UUUA
• Brand: BEI Sensors
• Product Type: Single-turn Absolute Rotary Encoder
• Sensing Principle: Absolute optical encoding
• Resolution: 17 bit (defined by 177 in part number)
• Output Interface: Serial digital interface (custom U interface)
• Shaft Type: Custom solid shaft type U
• Housing Material: Aluminum alloy
• Protection Class: IP67
• Operating Temperature: -40℃ ~ +85℃
• Vibration Resistance: 10~2000Hz, 20g
• Shock Resistance: 100g, 11ms
• Supply Voltage: 5VDC / 24VDC (custom version)
• Mounting: Servo flange mounting
• Weight: Approx. 0.42 kg
• Certifications: CE, RoHS
• Lifecycle: Industrial MRO spare part, custom OEM variant

Applications

1. Lifting Machinery: Rotation angle and hoisting position feedback for gantry & overhead cranes
2. Metallurgy: Angle positioning and closed-loop speed control for rolling mills and roller tables
3. Pulp & Paper Industry: Roller position and tension control angle detection for paper machines
4. Construction Machinery: Position acquisition for rotary platforms and actuators
5. Automated Production Lines: Closed-loop position feedback for rotary fixtures and turnover mechanisms
6. Hydropower & Wind Power: Blade angle monitoring for hydro turbines and wind turbines

Series Models

S20A-177U, S20A-12U, S20A-13U, S20A-16U, S20A-17U, S20B-177U-UUUA