Rockwell / Allen-Bradley 40888-490-01-S1FX Standard SMC Dialog Plus Control Module

The Rockwell / Allen-Bradley 40888-490-01-S1FX is a solid-state motor control module engineered for three-phase squirrel cage motors across industrial automation and manufacturing environments. This standard SMC Dialog Plus control module delivers configurable motor acceleration through soft start, current limit start, dual ramp start, and full voltage start modes, paired with multiple stopping options including soft stop, pump control, smart motor braking, and accu-stop functions. The module integrates comprehensive electronic protection - overload algorithms, stall and jam detection, line fault monitoring, phase loss detection, and over-temperature safeguards via internal thermistors - alongside diagnostic metering and multi-protocol communication capabilities.

Technical Specifications

• Motor Input Voltage: 200 to 600 V AC, three-phase


• Control Power Input: 100 to 240 V AC (single-phase), ±10/-15% tolerance


• Control Power Frequency: 50/60 Hz


• Control Power Requirement: Maximum 40 V·A


• Current Rating: 1 to 1000 A (configurable)


• Power Rating: 0.3 to 1000 hp


• Manufacturer: Rockwell / Allen-Bradley


• Status: Discontinued as of July 31, 2015

Key Features

• Four selectable starting modes with optional kickstart on current limit and soft start modes


• Six stopping and braking options including preset slow speed and energy saver mode for lightly loaded applications


• Phase rebalance monitoring for continuous three-phase line voltage assessment


• Undervoltage monitoring and open gate fault detection


• Built-in 2-line by 16-character LCD keypad interface or optional Bulletin 1201 HMI configuration

Communication & Integration

• SLC, Flex I/O, and Remote I/O protocols supported


• DH-485/RS-232 (DF-1) communication


• DeviceNet communication via Bulletin 1203 communication modules


• Compatible with Bulletin 150 SMC Dialog Plus series as a standard replacement control module

Typical Applications Three-phase motor starting, acceleration control, and protection in process automation, pump control systems, and industrial drive applications requiring configurable soft-start and braking functionality.