Rockwell Automation Publication 1560F-UM001A-EN-P - June 2019
43
Product Overview
Chapter 1
If the loss of current loop transformer assembly is detected by SMC-50 control
module, then the terminal A2 will be maintained at high, and terminal A3 will be
adopted to initiate the stop. In this situation, when the stop button is pressed, the
CR relay opens the terminal A3 of 150-SM4 Digital I/O card inserted in SMC-
50 module, Terminal A3 will be always programmed to be Coast-to-stop, so that
when current loop transformer assembly doesn't work properly, the SMC-50 will
only do Coast-to-Stop.
If the motor has started, the unit is in the bypass mode, and a trip occurs within
the SMC-50 module or from an external protection relay; “Aux #2” will open the
line contactor immediately, and “Aux #1” will remain closed for the number of
programmed 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 1562F • Programming Interface Control
The control scheme shown in
allows the SMC-50 to be controlled
using Programming Interface Control. See
for Logic Command Word bits assignment. This
interface includes provisions for a “Local” mode of control as well.
With the Local-Off-Remote selector switch in the “Remote” position, terminal
A2 and A3 of the 150-SM4 DigitaL I/O card will be maintained high, and
terminal A1 will open which allows a start command to be executed via the
interface control. When a “Start” is executed, the “Aux #2” contact closes,
energizing both “M-IV” and “MCX”. The line contactor closes and the unit
initiates a start sequence. The E-Stop button still works in remote mode.
When the motor approaches rated speed, the SMC-50 module closes “Aux #1”,
energizing “B-IV”, which closes the bypass contactor.
A stop command can be generated via the interface to stop the motor, depending
on the stop mode.
Summary of Contents for SMC-50
Page 10: ...10 Rockwell Automation Publication 1560F UM001A EN P June 2019 Table of Contents Notes ...
Page 12: ...12 Rockwell Automation Publication 1560F UM001A EN P June 2019 Preface Notes ...
Page 68: ...68 Rockwell Automation Publication 1560F UM001A EN P June 2019 Chapter 2 Installation Notes ...
Page 120: ...120 Rockwell Automation Publication 1560F UM001A EN P June 2019 Chapter 4 Programming Notes ...
Page 130: ...130 Rockwell Automation Publication 1560F UM001A EN P June 2019 Chapter 5 Metering Notes ...
Page 156: ...156 Rockwell Automation Publication 1560F UM001A EN P June 2019 Chapter 8 Diagnostics Notes ...
Page 198: ...198 Rockwell Automation Publication 1560F UM001A EN P June 2019 Chapter 10 Maintenance Notes ...
Page 284: ...284 Rockwell Automation Publication 1560F UM001A EN P June 2019 Appendix H Spare Parts Notes ...
Page 286: ...286 Rockwell Automation Publication 1560F UM001A EN P June 2019 Appendix I Accessories Notes ...
Page 291: ......