HD25A Absolute Industrial Rugged Metal Optical Er ^ Absolute Industrial Rugged Metal Optical Encoder, Page 1 The HD25A is a NEMA 25 sized absolute encoder designed for industrial applications. The HD25A optical encoder is a 12-bit absolute rotary position sensor, which reports a shaft angle within a single 360 degree rotation of a shaft. Unlike incremental, sometimes called relative style encoders, the HD25A provides true (absolute) shaft position, eliminating the need for a home or zero cycle after a supply voltage power cycle. The HD25A communicates over a RS 485-style serial bus utilizing US Digital's SEI (Serial Encoder Interface) which allows for simple, quick and convenient networking of multiple SEI devices on a single network. PLCs, motion controllers and computers can also reside on the SEI bus as well by use of US Digital's SEI to USB interface device. For complete information about the SEI bus please refer to the SEI Communications Protocol webpage. The HD25A also provides analog output. The analog output provides a maximum voltage range of 0 to 4.095 volts with 12-bit resolution. The output voltage can be scaled by simple SEI commands to provide user defined voltage ranges. From the factory, the analog output voltage is set to 0 to 3.599 VDC range. Please note that with the HD25A analog output option only one device may reside on a SEI bus. ► NEMA size 25 package ► Anodized milled aluminum housing with O-ring housing seal ► 3/8" diameter shaft ► Up to 15 devices on a single 6-pin telephone-type cable ► 12-bit accuracy ► 7 milliseconds update time ► EEPROM stores downloadable parameters ► Field programmable resolution (2 to 4096 CPR) ► Remotely updatable firmware r* Software ► www.usdigital.com/support/software/sei ► www.usdigital.com/assets/USDProducts.zip (.zip file with installer) Mechanical Drawing USE= 1400 NE 136th Avenue [email protected] Local: 360.260.2468 DIGITAL Vancouver, Washington 98684, USA www.usdigital.com Toll-free: 800.736.0194

U OTA Absolute Industrial Rugged Metal Optical Er I I Absolute Industrial Rugged Metal Optical Encoder, Page 2 ocfiSM pliant <& Environmental Parameter Operating Temperature Vibration (5 to 2kHz) Shock, 11 mSec Electrostatic Discharge, IEC 61000-4-2 Mechanical Parameter Size Housing and Cover Material Weight Shaft Material Shaft Diameter Shaft Optional Flat Size Max. Acceleration Value Units Value NEMA 25 Anodized aluminum 16.91 oz. Stainless steel 0.3748 in. (+0.0000 in. -0.0004 in.) 0.80 in. long x 0.03 in. deep 100000 rev / sec2 DIGITAL Vancouver, Washington 98684, USA www.usdigital.com Toll-free:...

usa= LI on A Absolute Industrial Rugged Metal Optical Er'v Ji * DIGITAL I I Absolute Industrial Rugged Metal Optical Encoder, Page 3 of<SM pliant DIGITAL Vancouver, Washington 98684, USA www.usdigital.com Toll-free: 800.736.0194

HD25A Absolute Industrial Rugged Metal Optical Er ^Absolute Industrial Rugged Metal Optical Encoder, Page 4 0 3600 0 9600 0 SEI address Resolution Origin offset Baud rate Mode (1) Mode is always restored from non-volatile EEPROM on power-up; however, there are separate SEI commands for setting the RAM copy only, or both the RAM copy and the non-volatile EEPROM copy. For an explanation of the Mode bits see SEI Absolute Encoder Communications Protocol. ^ SEI Network ® Analog Output In addition to the SEI interface, the HD25A also provides a 0 to 4.095 V analog output (1 mV per count). The absolute...

DIGITAL Vancouver, Washington 98684, USA www.usdigital.com Toll-free: 800.736.0194