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Rockwell Automation Publication 150-QS003D-EN-P - November 2013 19
Installation Chapter 2
Figure 11 - 3-Wire Control (with or without DPI) with Up-To-Speed Indication &
Isolation Contactor
➊ Customer supplied.
➋ See the controller nameplate to verify the control power input ratings (120V/240V AC or 24V DC).
➌ Terminal 11 (In1) 24V DC is configured for START input using Parameter 56.
➍ Terminal 10 (In2) 24V DC is configured for Coast, Stop Option, etc. using Parameter 57.
NOTE: The controller will generate an I/O configuration fault if any input is configured for START or SLOW speed
and no input is configured for COAST or STOP.
➎ A customer-supplied jumper is required to enable the controller’s standard I/O operation.
➏ The Aux2 output contact is configured for motor UTS using Parameter 176.
➐ The Aux1 output contact is configured for Normal (closed with Start command, Open with stop command) using
Parameter 172.
➑ The terminal must be wired to the control ground to ensure 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.
Option Modules
SMC-50 controllers have three expansion ports. These ports provide the
capability to add optional modules (e.g., additional inputs and outputs (I/O),
simple start/stop parameter configuration capability, ground fault, etc.).
Up-to-Speed
Indication
Stop
Start
3
1
4
1
1
1
Isolation
Contactor
IC
Intl +24V DC
In1 DC
In2 DC
Enable I/O
Intl DC Common
Aux 2
Aux 1
Control
Ground
5
8
2
-L2 +L1
-L2 +L1
-L2
+L1
+L1
-L2
7
6
12
11
10 9
8
7
65
4
32
1
UTS
Control Power
NOTE: The 20-COMM-X communication modules may only reside in Port 9.
ATTENTION: There is the potential to have voltage values above 220V
AC on the option modules. Before removing the control module cover to
access option modules, disconnect ALL power to the SMC-50 controller.