Rockwell Automation MV SMC Flex Motor Controller (for Series K or later) - Manual (Page 37)

Rockwell Automation Publication 1560E-UM051F-EN-P - June 2013 27
Product Overview Chapter 1
An uncontrolled, or coast stop, can be achieved via DPI or by opening the
connection on terminal 18 (i.e. by pressing “Coast Stop” button).
When using the optional HIM, pressing the “Jog” button will initiate the
optional stop maneuver, and pressing the “O” button will initiate a coast stop.
To run in “Local” mode, the “CR” contact is used to initiate a start and stop
sequence (similar to
Figure 21 ). An uncontrolled, or coast stop, is achieved by
opening the connection on terminal 17. This contact should remain open to
ensure all hold-in contacts clear, to prevent a re-start.
If the motor has started, the unit is in bypass mode, and a trip occurs within the
SMC Flex module or from an external protection relay, “Aux #4” will open the
line contactor immediately, and “Aux #1” will remain closed for 10 seconds to
protect the power electronics from any voltage transients due to opening the
motor circuits. A trip due to an overload or fault condition will result in a
“Coast” stop.
Bulletin 1560E • Basic Control – Controlled Start only
The Bulletin 1560E is intended for addition to an existing motor controller,
which provides circuit isolation, motor switching, and overload and overcurrent
protection. When wired as shown in
Figure 24 , the controller operates as follows:
When a start is initiated in the existing motor controller and the contactor (or
breaker) closes, a contact must be supplied to tell the 1560E to start also. A “CR”
contact will apply control voltage to terminal 17 of the SMC Flex module.
When stopping the motor, the contactor in the existing controller will open,
removing power from the motor, and then the “CR” relay. The bypass hold-in
rung will keep the bypass contactor closed for 10 seconds to protect the power
electronics from any voltage transients due to opening the motor circuits.
The “Fault” contact on the SMC Flex module should be wired into the existing
controller to trip the main contactor (or breaker) in the event of a fault condition
sensed by the SMC Flex module.
If possible, it is better to have the SMC Flex module control the main contactor
directly. In this case, the control circuit would look like, and function like, the
descriptions above for the Bulletin 1562E.