Rockwell Automation 150 MNL/SMC DIALOG+/APP-PROD GUIDE - Manual (Page 42)

SMC Dialog Plus Smart Motor Controller 3-5
Electronic Overload
The SMC Dialog Plus controller meets applicable requirements as
motor overload protective device. Overload protection is
accomplished electronically through an I
2
t algorithm.
The overload is programmable, providing the user with flexibility.
The overload trip class is selectable for class 10, 15, 20, or 30
protection. The trip current is set by entering the motor’s full load
current rating and the service factor.
Thermal memory is included to accurately model motor operating
temperature. Ambient insensitivity is inherent in the electronic
design of the overload.
Note: The current sensing capability of the SMC Dialog Plus
controller is disabled during bypass operation. The Bulletin
825 Converter Module is required to provide current
feedback in these applications.
Built-in Communication Port
A serial interface port is furnished as standard with the SMC Dialog
Plus controller. This communication port allows for connection to a
Bulletin 1201 Human Interface Module. It also allows for a variety of
other communications, including Allen-Bradley’s Remote I/O, DH-
485, RS 232/422/485-DF1, and DeviceNet

network through the
connection to the Bulletin 1203 communication modules.