Overview

The SMC-250 Synchronous Motor Controller is a prepackaged control

and protection solution for brushless, synchronous motor applications.

It features the DECS-250 Digital Excitation Control System and a Basler

Electric protection device for motor pullout protection. Both are integrated

into a compact package that is preconfigured, prewired, and tested for

easy installation in a new or existing enclosure, saving installation and

commissioning time.

Features

• 20-ampere, pulse-width-modulated (PWM), insulated-gate bipolar

transistor (IGBT) power stage

• Single DECS-250 or dual, redundant DECS-250 option

• Control modes: var/power factor, field current regulation, and field

voltage regulation

• Available protection:

-Power factor/loss of synchronization (55)

-Over/Under Field Current (40)*

-Fuse loss detection protects against false trip due to loss of voltage

sensing (60FL)*

-Up to 24 resistive temperature detectors (49RTD) inputs provide

thermal protection with an optional remote RTD module*

-Up to 100 starts per time interval protection (66)*

-Undervoltage (27)

-Overvoltage (59)

-Instantaneous undercurrent (37)*

-Instantaneous overcurrent (50)*

• Communication provisions:

-USB

-Modbus® RS-485 RTU

-Ethernet 100Base-T (Modbus TCP)

• Monitoring:

-Real-time monitoring

-Data logging

-Sequence of events recorder

• Programmable logic for DECS-250 and BE1-11m option