Rockwell Automation 1560E SMC Flex Smart Motor Controller - Manual (Page 40)

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Functional Description (cont.) 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
1.25, 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 a short time.
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.
Bulletin 1560E • Basic control – With Controlled Stop
When wired as shown in Figure 1.26, the controller operates much the
same as described above for the Standard module. The control signal uses
terminal 16 instead of 17, and a “coast” stop can be achieved by opening
the connection to terminal 17.
It is more important in this configuration to integrate the control circuit of
the 1560E with the existing controller, for better control of the Stop
option. The “start signal” for this scheme cannot be a slave of the main
contactor, since it must remain closed to accomplish the option stop
maneuver. The SMC-Flex module can be used to control the main
contactor such that it will close when a start is initiated, and remain closed
until it has sensed the motor has stopped following an option stop
maneuver.