Rockwell Automation 1902 Syncpro II - Manual (Page 24)

26 Rockwell Automation Publication 1902-IN001B-EN-E - April 2013
Chapter 3 Installation
Wiring Guidelines The SyncPro II can accept either two- or three-wire control. The control chosen
will determine the configuration of the control hardware. Consider the following
two inputs and single output when selecting the type of control:
If using two-wire control, the two inputs (I:2/0 and I:2/1) are tied together.
They are both low in order to stop the SyncPro II (see
Summary on page 32 ) and
both high in order to run the device. To start the device after a fault, the START
input (I:2/1) must be taken low and then closed again. In this configuration, the
RUN output acts as a run command (see
Figure 4 ).
If using three-wire control, the NOT STOP input must be maintained high in
order to run the device. Momentarily opening this input will cause the SyncPro II
to stop (see
Summary on page 32 ). Momentarily closing the START input will
start the SyncPro II (given that all permissives are satisfied). In this configuration,
the RUN output acts as a start command (see
Figure 5 ).
Figure 4 - Two-wire Control
In both cases, the RUN output will follow the state of the START input,
provided that all starting conditions are met. Note that in all cases, stopping the
motor is done via the hardwired control circuit logic, and notification only is
given to the SyncPro II.
Figure 4 shows a typical two-wire control circuit. The selector switch is used to
control the NOT STOP and the START as a pair. It is also used to ensure the
motor is stopped via the hardwired control circuit logic, (even though in this case
the RUN output will be removed when the selector switch is turned off ).
I:2/0 NOT STOP input
I:2/1 START input
O:0/1 RUN output