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Allen-Bradley 150-SM4 digital I/O expansion module for SMC-50 soft starters

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Allen-Bradley 150-SM4

by Allen-Bradley

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OverviewThe Allen-Bradley 150-SM4 is a high-performance digital I/O expansion module designed to seamlessly integrate with your existing SMC-50 smart motor controllers. This robust plug-in module significantly extends the capabilities of your motor control system by providing crucial additional input and output functionalities. With 4 AC digital inputs and 3 isolated relay outputs, the 150-SM4 empowers industrial applications with enhanced signal management, precise status indication, and superior control integration. Designed for ultimate reliability and ease of use, this module is an essential component for optimizing the performance and flexibility of your motor-driven systems.Key Features SMC-50 Integration: Specifically designed to expand the I/O capabilities of Allen-Bradley SMC-50 soft starters, ensuring perfect compatibility and communication. Versatile AC Inputs: Equipped with 4 AC inputs, allowing for the connection of various external digital signals such as start/stop commands, safety interlocks, and critical alarm triggers. Reliable Relay Outputs: Provides 3 isolated relay outputs for robust status indication, remote control of auxiliary equipment, or direct interface with other control systems. Enhanced System Monitoring: Facilitates comprehensive monitoring of your industrial processes by allowing integration of diverse sensors and feedback devices. Optimized Control: Improves overall system control and responsiveness through expanded digital signal handling, leading to more efficient and reliable operations. Effortless Plug-in Installation: Designed for quick and straightforward plug-in mounting, minimizing downtime and simplifying system upgrades. Globally Certified: UL, CSA, and CE certified, guaranteeing adherence to international safety and quality standards, making it suitable for worldwide deployment. Technical Specifications Brand: Allen-Bradley Series: Bulletin 150 / SMC-50 Part Number: 150-SM4 Digital Inputs: 4 AC inputs Relay Outputs: 3 isolated relay outputs Input Type: AC voltage (typically 120/240V AC, configuration-dependent) Mounting Type: Plug-in module Compatibility: Designed exclusively for SMC-50 soft starters Condition: New Applications Industrial Automation: Integrate into complex automation systems for precise equipment control. Pump and Fan Systems: Ideal for managing start/stop operations, fault detection, and status reporting in critical fluid and air movement applications. Conveyors and Packaging Machines: Enhance control over material handling, ensuring smooth operation and improved throughput in production lines. Status Feedback: Provide essential operational data and alarm statuses directly to programmable logic controllers (PLCs) or human-machine interfaces (HMIs). System Interlocks: Implement critical safety interlocks and enable efficient remote control capabilities for enhanced operational flexibility. Water and Wastewater Treatment: Monitor and control various processes, such as pump sequencing and valve operations, for optimal plant efficiency. Why ChooseThe Allen-Bradley 150-SM4 module delivers exceptional reliability and precision for industrial motor control applications. Its seamless integration with SMC-50 soft starters ensures optimal compatibility and an effortless upgrade path for existing systems. By expanding control capabilities with dedicated AC inputs and relay outputs, this module enhances operational efficiency, leading to more precise machine operation and reduced downtime. The plug-in design simplifies installation, allowing for quick system modifications as operational needs evolve. Backed by Allen-Bradley's reputation, this module meets global industry standards for quality and innovation.Order NowUpgrade your industrial control system with the Allen-Bradley 150-SM4 digital I/O expansion module. Contact Palm Parts Solution today to receive a quote or for more information on how this product can benefit your specific application.FAQWhat is the primary function of the Allen-Bradley 150-SM4?The 150-SM4 is a digital I/O expansion module designed to extend the input and output capabilities of Allen-Bradley SMC-50 soft starters, providing additional control and monitoring functionalities.How many inputs and outputs does the 150-SM4 have?It features 4 AC digital inputs and 3 isolated relay outputs, enabling versatile signal management and control integrations.Is this module compatible with other soft starters besides the SMC-50 series?No, the 150-SM4 is specifically designed for exclusive compatibility with Allen-Bradley SMC-50 soft starters to ensure optimal performance and communication.What are some typical applications for this I/O module?Common applications include industrial automation and control panels, pump and fan systems, conveyors, packaging machines, status feedback to PLCs/HMIs, system interlocks, and water and wastewater treatment plants.Does the 150-SM4 meet international safety standards?Yes, it is UL, CSA, and CE certified, guaranteeing adherence to international safety and quality standards for global deployment.

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PRODUCT DETAILS

Allen-Bradley 150-SM4

Overview

This is a genuine Allen-Bradley component. PalmPartsSolution stocks it in new, refurbished, and surplus condition with tested warranty and same-day shipping on in-stock units.

Whether you are sourcing a like-for-like replacement for an existing installation, an emergency spare to keep a line running, or a qualified part for a new build, our team can confirm availability, revision, and lead time before you order.

Key Features

  • Genuine Allen-Bradley catalog part
  • Tested before shipment
  • Backed by PalmPartsSolution warranty
  • Cross-reference and revision assistance available
  • Compatible with the broader Allen-Bradley automation ecosystem

Compatibility

When ordering, match the full catalog/part number, hardware revision, and firmware revision called out by your Allen-Bradley equipment. Where applicable, confirm:

  • Input/output voltage and current rating
  • Communication protocol and network role
  • Mounting form factor and footprint
  • Operating temperature, humidity, and IP rating
  • Required certifications (UL, CE, ATEX, marine, etc.)

Not sure which revision you need? Send us the catalog number on the nameplate and we will confirm the correct match.

Replacement Information

Three ways to source this part through PalmPartsSolution:

  1. Exact replacement — same Allen-Bradley catalog number, new or refurbished, tested and warrantied
  2. Form-fit-function equivalent — alternate revision or build that drops in without code changes
  3. Engineered migration — current-generation Allen-Bradley platform with documented conversion notes

Contact our engineering team if you need help choosing between these tracks.

Technical Specifications

  • Brand: Allen-Bradley
  • Series: Bulletin 150 / SMC-50
  • Part Number: 150-SM4
  • Digital Inputs: 4 AC inputs
  • Relay Outputs: 3 isolated relay outputs
  • Input Type: AC voltage (typically 120/240V AC, configuration-dependent)
  • Mounting Type: Plug-in module
  • Compatibility: Designed exclusively for SMC-50 soft starters
  • Condition: New

Applications

  • Industrial Automation: Integrate into complex automation systems for precise equipment control.
  • Pump and Fan Systems: Ideal for managing start/stop operations, fault detection, and status reporting in critical fluid and air movement applications.
  • Conveyors and Packaging Machines: Enhance control over material handling, ensuring smooth operation and improved throughput in production lines.
  • Status Feedback: Provide essential operational data and alarm statuses directly to programmable logic controllers (PLCs) or human-machine interfaces (HMIs).
  • System Interlocks: Implement critical safety interlocks and enable efficient remote control capabilities for enhanced operational flexibility.
  • Water and Wastewater Treatment: Monitor and control various processes, such as pump sequencing and valve operations, for optimal plant efficiency.

Why Choose the 150-SM4?

The Allen-Bradley 150-SM4 module delivers exceptional reliability and precision for industrial motor control applications. Its seamless integration with SMC-50 soft starters ensures optimal compatibility and an effortless upgrade path for existing systems. By expanding control capabilities with dedicated AC inputs and relay outputs, this module enhances operational efficiency, leading to more precise machine operation and reduced downtime. The plug-in design simplifies installation, allowing for quick system modifications as operational needs evolve. Backed by Allen-Bradley's reputation, this module meets global industry standards for quality and innovation.

Availability & Shipping

  • In stock: 150-SM4 ready for immediate dispatch from our Florida warehouse.
  • Free USA shipping: FedEx Priority (2–5 business days) and UPS Ground (3–5 business days). Expedited options available at checkout.
  • Worldwide delivery: FedEx International Priority (1–5 days), UPS International Priority (3–5 days), and USPS International (5–10 days) — rates calculated at checkout.
  • Bulk pricing: Volume discounts on request — contact our sales team for quantity quotes.
  • Buy with confidence: Every 150-SM4 ships with a 1-Year PALM Parts warranty and a 30-day return window.
SUPPORT

Frequently Asked Questions — Allen-Bradley

The 150-SM4 is a digital I/O expansion module designed to extend the input and output capabilities of Allen-Bradley SMC-50 soft starters, providing additional control and monitoring functionalities.

Machine down? We ship parts the same day.

New, surplus, and refurbished Allen-Bradley inventory in stock. Request a quote or speak directly with an automation specialist for emergency sourcing.

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PALM Parts Solution operates as an independent industrial automation supplier and is not an authorized distributor or affiliate of any listed manufacturer or brand name. Manufacturer trademarks and product names are used solely for identification purposes. Original manufacturer warranties do not apply. All products sold by PALM Parts are backed by our own 1-year warranty.

Product Condition & Firmware

All products are sold as new unless stated otherwise. Original manufacturer packaging may show signs of handling, storage, or shelf wear. Date codes and series may vary from current factory production. PALM Parts does not guarantee the presence, version, or compatibility of any firmware on PLC or automation products.

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