turck DeviceNet RM-89, User Manual

4 

www.turck.com

 • 1-800-544-7769 • Fax: 

(763) 

553-0708 • TURCK 

 • Minneapolis, 

MN 

55441 

www.turck.com

 • 1-800-544-7769

•  Fax: (763) 553-0708

•  TURCK  •  Minneapolis, MN 55441 

 5

TURCK 
RM-89

Chapter 1: Introduction to the RM-89

Overview

The RM-89 is a new line of heavy-duty resolver based resolver products from TURCK .  This manual is for the RM-89 resolvers 

with a DeviceNet interface .  TURCK offers RM-89 resolvers for other network protocols such as EtherNet/IP .  These products are 

covered in separate manuals .   

The RM-89 series is composed of absolute single and multi-turn sensors in an IP67 rated, 2 .5 inch diameter package .  All 

RM-89 Networked Resolvers offer a maximum single turn position resolution of 16 bits, which is programmable from 1 to 

65,536 counts per turn . A multi-turn unit that encodes 4,096 turns (12 bit + 16 bit =28 bit resolver) is available in addition to 

the single-turn RM-89 . A flange mount unit with end connectors is shown in figure 1 .1 . The following mounting styles are 

available:

•RM-89 standard flange mount with 3/8", 1/4", or 10mm shafts

•RM-89 standard servo mount with 3/8", 1/4", or 10mm shafts

•RM-89 58 mm servo mount with 6mm or 10 mm shafts

End connect versions of all of these mounting styles are available .  

The RM-89 resolver based resolvers for DeviceNet are designed for use with the DeviceNet thin cable media and mate with 

the DeviceNet 

eurofast ®

 (M12) connectors .  DeviceNet thin cable media is commonly used for drop lines off of a trunk line 

on large installations or as the only media type on smaller installations .  Thin cable media supports total cable lengths of up to 

100 meters (330 feet) .

Network address and bus speed are set with rotary and DIP switches that are accessible behind the rear cover of the RM-89 .  

Once the network address and speed is set, the remaining parameters of the RM-89 are configured over its DeviceNet 

interface .  Parameters allow you to set the count direction, format of the velocity data, number of counts per turn, and the 

rollover count, which is the number of counts before the position returns to zero .  

During normal operation of the network, the RM-89 supports Explicit, Bit-Strobe, Poll, and Cyclic connection types .  The RM-89 

can support all of these connection types simultaneously .

All RM-89 resolver based resolvers have two status LED’s to help you determine the state of the device .  These LED’s are always 

located on the back cover of the RM-89 .

 •

Module Status (MS)

 – Operating status of the RM-89 itself

 •

Network Status (NS)

 – Operating state of the DeviceNet protocol

Figure 1 .1 RM-89 Resolver Based Resolver