Product Details
Product Overview
The 1762-OB32T is a high-density digital expansion module designed for the MicroLogix 1100, 1200, and 1500 controller families. This solid-state component provides thirty-two sourcing outputs in a compact form factor, significantly increasing the I/O capacity of a PLC system without requiring additional rack space. By utilizing the 1762-OB32T, engineers can drive multiple 24V DC field devices, such as solenoids, interface relays, and indicator lamps, with high reliability and rapid switching speeds.
Technical Specifications
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Manufacturer Allen-Bradley / Rockwell Automation
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Product Line MicroLogix 1762 Expansion I/O
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Model Number 1762-OB32T
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Output Type Solid-State Sourcing (Source)
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Number of Outputs 32 Channels
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Wiring Configuration Two (2) isolated groups of 16 channels each
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Nominal Operating Voltage 24V DC
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Operating Voltage Range 10.2V to 26.4V DC
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Current Rating (Per Channel) 0.5 A at 60 °C (140 °F)
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Current Rating (Per Group) 2.0 A at 60 °C (140 °F)
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Current Rating (Total Module) 4.0 A at 60 °C (140 °F)
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Surge Current Capacity 2.0 A (Repeatable every 2s for 10ms at 60 °C)
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Minimum On-State Current 1 mA
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Maximum Heat Dissipation 3.4 Watts
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Supported Wire Sizes 22 AWG, 24 AWG, and 26 AWG
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Shipping Weight 0.31 lbs (0.14 kg)
Hardware Installation and Thermal Management
The 1762-OB32T features a high-density design that requires careful attention to thermal loads. To maintain the 0.5 A per channel rating at elevated temperatures (60 °C), ensure that the total module current does not exceed 4.0 A. The module utilizes a ribbon-cable or high-density connector interface rather than traditional screw terminals to accommodate the 32-point count within a small footprint. It is recommended to use pre-wired cable assemblies to simplify integration and reduce wiring errors.
Comparison: 1762-OB32T vs. 1762-OB16
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Density The 1762-OB32T provides double the output capacity in the same physical width as the 16-point 1762-OB16 module.
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Wiring While the OB16 uses standard terminal blocks, the 1762-OB32T utilizes a high-density connector, often requiring an external terminal interface for field wiring.
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Application Ideal for systems with high actuator counts where panel space is strictly limited.
Frequently Asked Questions
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Does the 1762-OB32T support sinking output configurations?
No, this module is strictly a "Sourcing" (Source) output type, meaning it provides the positive side of the 24V DC circuit to the load.
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What happens if an output is short-circuited?
While solid-state, the 1762-OB32T should be protected by external fuses. Exceeding the 2.0 A surge rating or 0.5 A continuous rating per channel may cause permanent damage to the output transistors.
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Is this module compatible with the MicroLogix 1000?
No, the 1762 expansion series is only compatible with the MicroLogix 1100, 1200, and 1500 series controllers.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
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Human-Machine Interfaces (HMIs) serve as the primary operational window into complex industrial automation systems. Modern HMIs convert raw machine data into clear graphical displays, enabling operators to oversee entire manufacturing processes in real time. Instead of relying on physical control panels full of hardwired switches, engineers program interactive screens using intuitive graphics, dynamic color coding, and responsive touch interfaces. Over my 15 years in control systems engineering, I have observed HMIs transform from basic display screens into sophisticated command centers that drive operational efficiency across DCS and PLC environments.
Understanding Safety Relays in Industrial Automation: Architecture, Operation, and Functional Safety
Standard electromechanical relays provide basic electrical isolation between low-voltage control circuits and high-power output loads. A traditional switching relay features a magnetic coil driving mechanical Common (COM), Normally-Open (NO), and Normally-Closed (NC) contacts. However, standard relays pose severe functional risks when deployed in critical safety interlock circuits. High current inrush or mechanical wear can weld contacts together permanently. If contact welding occurs in an emergency stop circuit, pressing the button fails to halt hazardous machinery movements. Consequently, global functional safety standards prohibit standard relays for critical machine guarding functions.
Mastering Wire Identification in Industrial Automation: The Power of Ferrules and Cross-Ferruling
Proper wire labeling forms the cornerstone of reliable control system installation and long-term maintenance. In complex industrial automation environments, technicians terminate thousands of conductor ends inside control panels, marshalling racks, and field junction boxes. Ferrules serve as individual tube-shaped sleeve markers slipped onto conductors before final termination. While technicians historically relied on pre-printed individual letter rings, modern control panel builders utilize automated ferrule printing machines. These thermal-transfer printers generate durable, single-sleeve heat-shrink tags directly matching approved wiring schematics, significantly accelerating cabinet assembly workflows.