Rockwell Automation 8720MC High Performance Drives Installation Manual - Manual (Page 58)

Publication 8720MC-IN001D-EN-P — December 2002
2-24 8720MC Connector Data
The Stegmann SRM-60 is a multi-turn absolute feedback device
capable of providing absolute feedback from 0 to 4096 turns of the
motor. Each of these feedback devices outputs accurate sine and
cosine signals. The SNS-60, SRS-660 and SRM-60 output 1024
sinusoidal periods per revolution. These sine waves are interpolated
by the 8720 MC and provide position resolutions of up to two million
counts per revolution.
Motor and Auxiliary Feedback Specifications
The table below lists motor encoder feedback specifications.
Motor
Option
Feedback Device
Maximum Cable
Length Attainable
Resolution Absolute
Capability
S1 SRS-660 90 m (295.2 ft) 4 x 10
6
1 turn,
32,768 counts
S2 SRM-60 90 m (295.2 ft) 2 x 10
6
4096 turns,
16,348 counts
S3 and
S4
SNS-60 90 m (295.2 ft) 4 x 10
6 None
Specification Description
Encoder Types Incremental, A quad B, Sine/Cosine, Intelligent, and Absolute
Maximum Input Frequency
1 MHz (TTL input) per channel
250 kHz (Sine/Cosine input)
Commutation Feedback N/A