Rockwell Automation 4100 REC Resolver to Encoder Converter Installation and Setup Manual - Manual (Page 46)

Publication 4100-5.2 - June 1998
41
Excitation Oscillator
The table below details the product performance of the excitation
oscillator for the REC.
Phase Loss Detection
The table below details the product performance of the phase loss
detection circuit for the REC.
Specification Description
Excitation Frequency 4000Hz at +25%
Amplitude 4.77V rms +5%
Specification Description
Purpose To detect loss of resolver signals.
Action
When fault occurs:
•
The status indication LED turns
from green to red
• The 30V DC 2A/125V AC
0.6A rated relay contact output
opens
• The motion controller detects
loss of feedback
After the problem is corrected, you can
clear the fault for each axis by: pushing
the reset button on the REC or by using
a home request from the motion
controller
Response range 0 < resolver shaft speed < 6000 rpm
Response Time The phase loss detection circuit will
respond within 180 degrees of resolver
element rotation as long as you use no
more than 100ft of specified cable.
Resolver inputs
The REC has been designed to use
Allen-Bradley Bulletin 846 and 1326
absolute feedback packages that
feature Harlowe 11BRCX-300-C or
equivalent resolver elements.
The 4.77V rms excitation amplitude has
been adjusted so that when you use the
resolvers listed above with the REC the
strators receive 2V rms +10%.