1762-OF4 MicroLogix 1200 4-Channel Analog Output Module | Allen-Bradley

Product Overview

The Allen-Bradley 1762-OF4 functions as a high-density analog expansion module for the MicroLogix 1100, 1200, and 1400 controller families. It provides four unipolar, single-ended channels to drive proportional valves, variable frequency drives (VFDs), and other analog field actuators. This module converts digital data from the controller into precise voltage or current signals. We supply this unit as 100% brand new and original, ensuring maximum signal integrity and backplane compatibility for your automation system.

Technical Specifications

The 1762-OF4 utilizes a 12-bit architecture to deliver fast, accurate analog control across the following parameters:

• Number of Outputs: 4 unipolar single-ended

• Operating Ranges: 0–10V DC or 4–20 mA

• Full-Scale Ranges: 0–10.5V DC or 0–21 mA

• Resolution: 12-bit (unipolar)

• Module Update Time: 2.5 ms

• Current Output Resistive Load: 0 to 500 Ohms

• Voltage Output Load Range: >1 kΩ

• Circuit Protection: Continuous Open Circuit and Short-Circuit Protection

• Heat Dissipation: 2.8 Watts

• Enclosure Rating: IP20

• Status Indicator: 1 Green Power LED

Engineering Advantages

• Fast Loop Response: A module update time of 2.5 ms ensures rapid signal synchronization. This speed allows the controller to maintain tight command loops for high-speed motion or pressure regulation applications.

• Comprehensive Circuit Defense: Integrated continuous short-circuit and open-circuit protection prevents hardware damage during field wiring faults. This feature safeguards the internal 12-bit DACs from accidental cross-wiring or actuator failure.

• Versatile Signal Configuration: The module supports both voltage (0-10V) and current (4-20mA) modes. This dual-capability allows engineers to standardize on a single part number across diverse projects, simplifying spare parts inventory.

• High-Density Efficiency: Packing four analog channels into a lightweight, 1 lb module saves significant DIN rail space. This compact design solves the challenge of adding multi-channel analog control to small-scale machine enclosures.

• Low Thermal Impact: The unit dissipates only 2.8 Watts during peak operation. This low power consumption reduces heat buildup within unventilated control boxes, preventing the derating of adjacent electronic components.

FAQs

• Does the 1762-OF4 require an external power supply? The module draws its power directly from the MicroLogix backplane. However, you must verify that your controller's power supply has sufficient capacity to support the additional 2.8W load plus any other expansion modules.

• Can I mix voltage and current signals on the same module? Yes. You can configure each of the four channels independently to provide either a 0-10V DC signal or a 4-20 mA signal based on your specific field device requirements.

• How do I confirm the module is receiving power? The 1762-OF4 features a dedicated green LED on the front panel. This indicator remains illuminated as long as the backplane provides stable power and the module passes its internal self-diagnostic checks.

• What is the maximum cable distance for the current output? The current output supports loads up to 500 Ohms. The maximum distance depends on the gauge of your wire and the internal resistance of the actuator. We recommend using shielded twisted-pair cable to minimize EMI interference over long distances.