Model DR21R Accu-Coder®

  • Replaces select discontinued RCH20D and RHS25D Renco encoders

Model DR21R Features

  • Line driver output with ABS stepped voltage output
  • Quadrature with index
  • 5 VDC input voltage
  • End-mount 16-pin header connection
  • Operating temperature up to 100°C
  • Replaces select Renco models RCH20D and RHS25D encoders

download_blueDownload Model DR21R datasheet

Purchase Options

  • Buy through a distributor
  • Get a Quote

Model DR21R Description

The Accu-Coder® Model DR21R is a highly customized, Direct Replacement Encoder with a unique, OEM-specific ABS stepped voltage output channel. Model DR21R configurations replace select Renco RCH20D and RHS25D models* originally installed on legacy F, H, W, N and HSM servo motor models. An exact mechanical and electrical cross-reference for these obsolete Renco configurations, the DR21R also incorporates EPC’s advanced Opto-ASIC sensing technology, providing superior thermal stability and signal reliability.

*These models have been discontinued by the manufacturer, and are increasingly difficult to find and costly to replace.

Renco to Accu-Coder® Part Number Cross-Reference

Renco Model # EPC Part # CPR Pole count Bore size Bolt circle Index gating Motor series
RCH20D-2000/4-1/2-5/0-LD/VC-7-M6-S DR21R-01 2000 8 0.500' 3.125" A F
RHS25D-P3-2000/4-1/2-5-CA6-LD-MS-CM-S DR21R-01* 2000 8 0.500" 3.125" A F
RCH20D-5000/4-1/2-5/0-LD/VC-1-M6-S DR21R-02 5000 8 0.500' 3.125" A & B F
RCH20D-2000/2-8MM-5/0-LD/VC-1-M6-S DR21R-03 2000 4 8 mm 2.375" A & B H, HSM2
RCH20D-2000/3-8MM-5/0-LD/VC-1-M6-S DR21R-04 2000 6 8 mm 2.375" A & B H, HSM3, HSM4
RCH20D-2000/4-1/2-5/0-LD/VC-1-M6-S DR21R-05 2000 8 0.500" 2.375" A & B H, HSM6, HSM8
RCH20D-5000/3-8MM-5/0-LD/VC-1-M6-S DR21R-06 5000 6 8 mm 2.375" A & B H
RCH20D-2000/3-1/2-5/0-LD/VC-7-M6-S DR21R-07 2000 6 0.500" 2.375" A W
RHS25D-P3-2000/3-1/2-5-CA6-LD-MS-CM-S DR21R-07* 2000 6 0.500" 2.375" A W
RCH20D-2000/2-12MM-5/0-LD/VC-1-M4-S** DR21R-08 2000 4 12 mm 1.812" A & B N

*Requires 6" Mating Cable, part # 080499-01

**Includes hub shaft cover


Talk with an Expert

We're here to help. Our engineers and encoder experts will respond quickly to your toughest, most technical encoder questions.

Expedite options are available on many models. Contact us for details.

For specific needs or requests:


Contact Customer Service