Rockwell Automation 4100 REC Resolver to Encoder Converter Installation and Setup Manual - Manual (Page 12)

Publication 4100-5.2 - June 1998
Chapter
1
Overview
REC Description The REC converts a single or dual (Master/Vernier) resolver input
signal to an A Quad B quadrature encoder output signal. The A Quad
B quadrature output signal can be directly connected to the 1394
GMC System module or the S Class Compact motion controller.
In operation, the REC uses differential quadrature encoder output
signals to send incremental position data to the motion controller
based on the position of the resolver. Absolute position can be sent to
the motion controller for re-calibration.
The REC provides an independent fault detector with normally open
relay contacts and an LED indicator for each axis. The relay fault
outputs can be:
• used to disable external devices in the event of a fault.
• incorporated into the machine’s E-stop string.
• incorporated into other protective circuitry.
The REC can trigger an encoder loss fault when it is used with the
1394 GMC system module or the S Class Compact.
REC Features The REC has the following features:
• Two AQB quadrature encoder output channels.
• Two resolver input channels that support Allen–Bradley single or
dual resolver packages.
• Resolution of 12 bits per resolver rotor rotation.
• The ability to interface directly with the Allen–Bradley 1394
GMC System and the S Class Compact motion controller.
• The ability to provide differential A and B quadrature encoder
output signals using 26C31 (or equivalent) driver IC.
• A resolver phase loss circuit that detects the loss of resolver
signals.
• Normally-open fault outputs for each encoder channel.
• A watchdog LED for each encoder conversion channel.
• An on-board reset switch that resets both axes.
• An absolute home request that remotely clears corrected faults for
each axis independently.
• A rugged steel housing with mounting tabs.