Rockwell Automation 150 MNL/SMC DIALOG+/APP-PROD GUIDE - Manual (Page 135)

SMC Dialog Plus Controller Special Application Considerations 5-11
SMC Dialog Plus Controller
with Bypass Contactor (BC) Controlled start and stop are provided by wiring the controller as
shown in Figure 5.7. When the motor is up to speed, the bypass
contactor is “pulled in” for run. The bypass mode reduces the amount
of heat produced by the SCRs.
Figure 5.7 Typical Application Diagram of a Bypass Contactor
SMC Dialog Plus Controller
with Reversing Contactor By using the controller as shown in Figure 5.8, the motor accelerates
under a controlled start mode in either forward or reverse.
Notes: (1) Minimum transition time for reversing is 1/2 second.
(2) Phase Reversal must be OFF.
Figure 5.8 Typical Application with a Single-speed Reversing Starter
Power Input
Branch
Protection ➀ SMC Dialog Plus Controller ➁
L1/1
L2/3
L3/5
T1/2
T2/4
T3/6
Motor
➀
➀ Customer supplied
➁ Overload protection is included as a standard feature of the SMC Dialog Plus controller.
Fast-acting
SCR Fuses
(optional) ➀
BC ➀
3-Phase
Power Input
Branch
Protection ➀
Reversing Motor Starter ➀
SMC Dialog Plus Controller ➀
L1/1
L2/3
L3/5
T1/2
T2/4
T3/6
Motor
➀
3-Phase
F
R
➀
➁ Customer supplied
Overload protection is included as a standard
feature of the SMC Dialog Plus controller.