Allen Bradley 1769-OF4CI engineered analog output module

Product Description

The 1769-OF4CI (1769-OF4CI) is a precision-engineered analog output module for Allen-Bradley CompactLogix and MicroLogix 1500 systems. Featuring four fully isolated differential channels, this module provides highly accurate 0–20 mA or 4–20 mA signals to drive field actuators, valves, and variable frequency drives (VFDs). The high level of channel-to-channel isolation ensures that ground loops and electrical interference do not compromise signal integrity, making it essential for complex industrial environments where reliability is non-negotiable.

Technical Specifications

• Model Number: 1769-OF4CI

• Output Channels: 4 Isolated Differential

• Current Ranges: 0 to 20 mA, 4 to 20 mA (Normal); 0 to 21 mA, 3.2 to 21 mA (Full Scale)

• Digital Resolution: 16 bits (Unipolar)

• Overall Accuracy: ±0.35% full scale at 25°C

• Step Response (63%): <2.9 ms

• Conversion Rate: 110 ms (all channels max)

• Load Impedance: 0 to 500 Ω (Resistive, including wire)

• Bus Current Draw: 165 mA @ 5V DC / 110 mA @ 24V DC

• Heat Dissipation: 2.68 Total Watts

• Environmental Rating: IP20; Class I, Div 2 Hazardous Locations (Groups A, B, C, D)

• Dimensions: 118 x 35 x 87 mm (4.65 x 1.38 x 3.43 in.)

Key Engineering Features

The 1769-OF4CI (1769-OF4CI) is designed for high-performance motion and process control tasks:

• Galvanic Isolation: Every output channel is isolated from the others and the backplane bus, protecting the PLC from high-voltage transients and preventing signal crosstalk.

• Advanced Diagnostics: Includes integrated over-range and under-range flags. These flags automatically notify the controller if the signal exceeds normal operating limits, allowing for proactive system maintenance.

• High-Resolution Output: With 16-bit unipolar resolution (approximately 0.323 μA/bit), the module provides extremely smooth and granular control for fine-tuned actuator positioning.

• Industrial Robustness: Certified for high-vibration (5G) and high-shock (30G) environments, and qualified for radiated and conducted immunity under IEC 61000-4 standards.

• Zero Calibration Maintenance: The module is factory-calibrated and designed to maintain accuracy over its lifespan without requiring field calibration procedures.