Allen-Bradley 150 Series Modules

Technical Dossier

Product Details And Specifications

Allen-Bradley 150 Series: Comprehensive Module Range and Technical Overview

The Allen-Bradley 150 Series, commercially designated as the SMC-Flex Smart Motor Controller, is a solid-state reduced-voltage motor starting platform manufactured by Rockwell Automation. It is deployed across heavy industrial sectors including petrochemical refineries, nuclear power auxiliary systems, offshore platforms, pulp and paper mills, and municipal water treatment facilities. The 150 Series occupies the mid-tier segment of Rockwell's motor control portfolio, positioned above basic soft starters and below full variable-frequency drive (VFD) systems. Its installed base spans several hundred thousand units globally, with a significant concentration in North American and Middle Eastern process industries where NEMA-rated enclosures and UL 508 compliance are mandatory procurement criteria.

The SMC-Flex platform supports motor ratings from 3 A to 1250 A (200–600 VAC, 3-phase), covering fractional horsepower auxiliary motors through large compressor and pump drives. Its core value proposition is controlled acceleration and deceleration without the harmonic distortion profile associated with PWM-based VFDs, making it the preferred solution in facilities with sensitive instrumentation buses.

The Evolution of 150 Series Architecture

The 150 Series lineage traces to Rockwell Automation's acquisition of the Allen-Bradley SMC product line in the early 1990s. The original SMC-2 and SMC-Plus controllers (catalog prefix 150-A and 150-B) used analog thyristor firing circuits with limited parameter adjustability and no fieldbus connectivity. These units were panel-mounted with discrete I/O only and required external overload relays.

The SMC-Flex generation (catalog prefix 150-C, 150-F, 150-S) introduced a microprocessor-based control board, onboard electronic overload protection, and optional communication adapter slots compatible with DeviceNet, Profibus DP, and EtherNet/IP. This architectural shift enabled integration with Rockwell's ControlLogix and CompactLogix PLC platforms via explicit messaging, eliminating the need for hardwired interlock panels in many applications.

The current production variants (150-F and 150-S prefixes) support parameter configuration via the 20-HIM-A6 or 20-HIM-C6S Human Interface Modules, or remotely through Studio 5000 Logix Designer with the appropriate EDS file. Legacy 150-C units remain in service but are no longer manufactured; firmware updates and replacement control boards are available through authorized distributors and third-party MRO suppliers. The 150 Series as a whole is in the mature/end-of-life phase of its product lifecycle. Rockwell Automation has not announced a direct successor platform, and long-term maintenance support is the primary procurement driver for this series.

150 Series Full Catalog & Functionalities (SKU List)

The following SKUs represent the core production and commonly stocked variants of the Allen-Bradley 150 Series SMC-Flex platform, organized by functional category. All units are 3-phase, 200–600 VAC unless otherwise noted.

Standard Smart Motor Controllers (No Options)

150-F60NBD: 60 A, 480 VAC, no bypass, DeviceNet port
150-F60NBRB: 60 A, 480 VAC, no bypass, Profibus DP port, base unit
150-F60NBR: 60 A, 480 VAC, no bypass, Profibus DP communication
150-F43NBD: 43 A, 480 VAC, no bypass, DeviceNet communication
150-F43NB: 43 A, 480 VAC, no bypass, no fieldbus, standalone operation
150-F97NBD: 97 A, 480 VAC, no bypass, DeviceNet port
150-F97NBR: 97 A, 480 VAC, no bypass, Profibus DP port
150-F135NBD: 135 A, 480 VAC, no bypass, DeviceNet communication
150-F180NBD: 180 A, 480 VAC, no bypass, DeviceNet communication
150-F251NBD: 251 A, 480 VAC, no bypass, DeviceNet communication

Bypass-Integrated Variants

150-F60FBD: 60 A, 480 VAC, internal bypass contactor, DeviceNet port
150-F97FBD: 97 A, 480 VAC, internal bypass contactor, DeviceNet port
150-F135FBD: 135 A, 480 VAC, internal bypass contactor, DeviceNet port
150-F180FBD: 180 A, 480 VAC, internal bypass contactor, DeviceNet port

EtherNet/IP Communication Variants

150-F60NBE: 60 A, 480 VAC, no bypass, EtherNet/IP adapter
150-F97NBE: 97 A, 480 VAC, no bypass, EtherNet/IP adapter
150-F135NBE: 135 A, 480 VAC, no bypass, EtherNet/IP adapter

Accessories & Replacement Modules

150-SM2: SMC-Flex control module, replacement board for 150-C/F series
150-SA1: Analog output option card, 0–10 VDC or 4–20 mA speed reference
150-SB1: Brake control option card for SMC-Flex platform

Sourcing Hard-to-Find & Obsolete 150 Series Parts

DriveKNMS maintains a dedicated inventory program for Allen-Bradley 150 Series components that have been discontinued or placed on extended lead time by Rockwell Automation's authorized distribution network. The 150-C prefix units (SMC-Flex first generation) and select 150-F variants with legacy communication options (DH+, ControlNet) are no longer available through standard channels and require specialist sourcing.

DriveKNMS sources these units through a verified network of industrial surplus dealers, decommissioned plant asset liquidations, and cross-border MRO exchanges. Each unit undergoes incoming inspection before listing. For customers operating facilities with long planned maintenance intervals (turnarounds every 3–5 years), DriveKNMS offers consignment stocking agreements to pre-position critical 150 Series spares on-site or in a bonded warehouse.

Customers requiring export documentation, country-of-origin certificates, or IEC/CE compliance declarations for import into EU, GCC, or Southeast Asian markets can request these documents at the time of order. Lead times for verified surplus units are typically 3–10 business days depending on current stock position.

Quality Control for the 150 Series Range

The Allen-Bradley 150 Series SMC-Flex presents specific test challenges due to its SCR (silicon-controlled rectifier) power stack architecture and integrated electronic overload relay. DriveKNMS applies the following inspection protocol to all 150 Series units processed through its facility:

Power Stack Verification: Each SCR firing circuit is tested under resistive load at rated current (±5%) to confirm symmetrical phase firing and absence of SCR leakage current. Units with asymmetric firing angles exceeding 2° are rejected. Control Board Functional Test: The microprocessor control board is bench-tested using a Rockwell-compatible HIM module to verify parameter read/write integrity, fault log access, and I/O response. Communication Adapter Test: DeviceNet, Profibus DP, and EtherNet/IP option cards are tested on a live network segment using a reference PLC to confirm node addressing, data exchange, and fault reporting. Electronic Overload Calibration: The onboard overload relay is tested across the full FLA adjustment range using a calibrated current injection source. Trip class accuracy is verified against the published time-current curves in Rockwell publication 150-UM009. Thermal Imaging: All units are operated at 75% rated load for 30 minutes and inspected with a thermal camera to identify hot spots indicative of degraded SCR junctions or loose bus connections. Units passing all five stages are issued a DriveKNMS inspection certificate and are eligible for a 12-month functional warranty.