1769-OF2 Allen-Bradley PowerFlex Compatible Output Module

Product Overview

The Allen-Bradley 1769-OF2 is a high-precision analog output module designed for the CompactLogix and MicroLogix 1500 systems. This 2-channel module provides the critical interface needed to convert digital controller data into precise analog signals for managing actuators, valves, and motor drives. 

Technical Configuration

Precision Signal Output

The 1769-OF2 offers exceptional signal clarity with 14-bit unipolar and 15-bit bipolar resolution. Each channel can be independently configured for multiple voltage ranges (±10V, 0-10V, 0-5V, 1-5V) or current ranges (0-20mA, 4-20mA). This versatility allows the 1769-OF2 to integrate seamlessly with a wide variety of field devices without the need for additional signal converters.

Robust Diagnostics & Protection

Designed for maximum uptime, the 1769-OF2 includes built-in short-circuit and over-voltage protection. It features proactive open-wire detection with a 10ms response time, allowing the controller to identify and react to wiring faults immediately. These diagnostic capabilities reduce troubleshooting time and protect sensitive equipment from electrical damage.

Technical Specifications

Installation & Maintenance Guide

• Backplane Placement: The 1769-OF2 has a power supply distance rating of 8. It must be installed within 8 slots of the 1769 system power supply to ensure proper operation.
• Wiring Requirements: Use 22-14 AWG solid or 22-16 AWG stranded shielded cable. Keep analog wiring separate from high-voltage AC lines to prevent signal interference.
• Grounding: To maintain high signal accuracy, ground the cable shield at the 1769-OF2 terminal block. Ensure only one end of the shield is grounded to avoid ground loops.
• Terminal Block: The module utilizes the 1769-RTBN18 removable terminal block, allowing for quick module replacement without disconnecting the field wiring.

Engineering Advantages

The 1769-OF2 provides a compact and efficient solution for precision-dependent control loops. Its 2.9ms step response is ideal for fast-acting systems like pressure regulation or high-speed drive synchronization. By integrating these channels directly into the Compact I/O chassis, the 1769-OF2 minimizes the latency associated with remote adapters, providing a more responsive control architecture for machine builders.

Technical FAQs

Q1: Does the 1769-OF2 require field calibration?
A1: No. The 1769-OF2 is factory-calibrated to high precision and does not require periodic adjustment in the field.

Q2: What happens if a wire is disconnected?
A2: The 1769-OF2 features open-wire detection that triggers a status bit in the controller within 10ms, allowing the logic to initiate a safe shutdown or alarm.

Q3: Can I mount the 1769-OF2 horizontally or vertically?
A3: The module is designed for DIN rail or panel mounting. While horizontal mounting is standard, ensure adequate vertical clearance for heat dissipation as per the user manual.

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