The Allen-Bradley 150-F317NBDD, also cataloged as the 150-F SMART MOTOR CONTROLLER, operates as a dedicated hardware component for thyristor-phase-angle reduced-voltage starting and DC-injected braking of 3-phase induction motors within SMC Flex drive networks.

Catalog Number Decoding

• 150-: Bulletin 150 SMC Flex solid-state reduced voltage controller family
• F: Open-type enclosure, no integral disconnect
• 317: 317 A rated operational current at 40 deg C (125-250 hp @ 460 VAC)
• N: Control voltage 100-240 VAC universal range
• B: Braking control enabled (DC injection / coast-to-stop logic)
• D: Standard logic board, DeviceNet-ready header
• D: Base firmware revision, no internal bypass contactor

Hardware Specifications

EtherNet/IP Producer-Consumer Mapping and Firmware Flash Lock

The 150-F317NBDD attaches to ControlLogix/CompactLogix MCC structures via optional 150-COMM-EN or 150-COMM-DN daughterboards using CIP explicit messaging. Firmware flash compatibility is bound to SMC Flex v4.x images; loading SMC-3 or 150-F625 images corrupts the braking-parameter block and forces POST halt at 0x91. I/O density scaling is fixed at 3 thyristor legs, 4 status discrete outputs, 2 analog ramp monitor channels mirrored to Logix tags at 10 ms RPI. Backplane bus velocity licence does not apply—termination is panel-wire, not rack-plugged. Braking control executes DC injection through two inverse-parallel thyristors after zero-speed detection, holding stator flux for 0.5-10 s adjustable decay.

Ordering Info

• 1 x 150-F317NBDD SMC Flex solid-state soft starter, open type
• 1 x Wiring and parameter quick-reference label sheet

Panel Mounting and Conductor Rules

• Mount vertically on rigid steel panel with 100 mm top clearance, 50 mm bottom clearance for convection off thyristor heat sink.
• Terminate line lugs with 4/0 AWG Cu conductors (75 deg C rating), torque to 41 N·m.
• Separate 100-240 VAC control wiring from 460 VAC power bus by 200 mm or route in bonded metallic conduit.
• Bond PE terminal to panel ground stud with conductor sized per NEC 250.122 for 317 A service.
• Do not exceed 40 deg C ambient without forced airflow of 0.3 m³/s across rear fins.

Frequently Asked Questions

Q: Can the 150-F317NBDD inject DC brake while line voltage is present?

A: No. DC injection initiates only after thyristor ramp completes and rotor speed falls below 15% synchronous. Applying brake logic during run holds thyristors in blocking state and trips on brake-overlap fault code 57.

Q: What control voltage range is permitted on the 100-240 VAC supply?

A: 90-264 VAC. Below 90 VAC the logic board resets; above 264 VAC the control transformer saturates and zero-cross detection drifts by 0.8 ms per 10 V overvoltage.

Q: Does suffix B include an internal bypass contactor?

A: No. Suffix A/D in last position indicates no internal bypass. Continuous run requires an external 350 A AC-3 contactor driven by the run-ready relay output to avoid thyristor steady-state heating.

Q: How is braking decay time configured?

A: Via HIM or Logix tag BRAKE_DECAY_MS, range 500-10000 ms. Setting 0 disables DC injection and reverts to coast-to-stop. Values outside range clamp to limits without fault.

Q: What is the thyristor forward drop at 317 A?

A: Approx 1.4 V per anti-parallel pair. Conduction loss = 1.4 V x 317 A x 3 = 1331 W dissipated to rear heat sink; panel ventilation must remove this load at 40 deg C ambient.

Q: Can EtherNet/IP and DeviceNet adapters be fitted simultaneously?

A: No. The logic daughterboard accepts one comms module. Swapping 150-COMM-DN for 150-COMM-EN requires power down and CIP parameter remap; concurrent fit bricks the HIM header.

Q: Minimum conductor temperature class for power terminals?

A: 75 deg C copper. Using 60 deg C conductors forces ampacity derating to 280 A, voiding 317 A nameplate and causing overload trip at 90% FLC.

Q: How is firmware flashed on bench?

A: Via HIM port with 1756-USB and SMC Flex Flash tool. Image must match 150-F hardware ID 0x317. Mismatched flash halts boot at POST 0x91 and requires factory recovery dongle.