Hardware reference guide
DIO
35013379 02 October 2007 265
Wiring Diagram The following figure shows the wiring diagram for the 140CRA21110 and 21210 
wiring diagram. 
Note: See Power and Grounding Considerations for AC and DC Powered 
Systems, p. 776 for power and grounding wiring guidelines and operational 
information.
NOT USED
NOT USED
–24VDC (Common)
+24VDC
AC L
AC N
This document provided by Barr-Thorp Electric Co., Inc. 800-473-9123 www.barr-thorp.com










