Allen-Bradley SMC-50 Quick Start Manual page 18

Chapter 1 Installation
16
Figure 7 - Three-wire Control (with or without DPI) with Up-to-speed Indication and Isolation
Contactor
(1)
Stop
(4)
Start
(3)
(1)
12
11 10
(1) Customer supplied.
(2) See the controller nameplate to verify the control power input ratings (120V/240V AC or 24V DC).
(3) Terminal 11 (IN1) 24V DC is configured for START input using Parameter 56.
(4) Terminal 10 (IN2) 24V DC is configured for Coast, Stop Option, etc. using Parameter 57.
NOTE: The controller generates an I/O configuration fault if any input is configured for START or SLOW speed and no input is
configured for COAST or STOP.
(5) A customer-supplied jumper is required to enable the controller's standard I/O operation.
(6) The Aux2 output contact is configured for motor UTS using Parameter 176.
(7) The Aux1 output contact is configured for Normal (closed with Start command, Open with stop command) using Parameter 172.
(8) The terminal must be wired to the control ground to maintain reliable operation.
NOTE: Due to current leakage through an SCR in the OFF state (controller stopped), some form of upstream line power isolation is
recommended if maintenance is required on the motor. See the typical wiring diagrams for Isolation Contactor Application in
the user manual.
Rockwell Automation Publication 150-QS003E-EN-P - April 2017
Up-to-speed Isolation
Indication Contactor
-L2 +L1 -L2
(1)
(1)
(6)
IC
UTS
(5)
9 8 6 5
7
Aux 2
+L1
Control Power
(7)
-L2 +L1
Control Ground
(2)
(8)
4 3 2 1
-L2 +L1
Aux 1