Product Overview

The 1769-OF4 is a high-precision analog expansion module designed for use with Allen-Bradley CompactLogix and MicroLogix 1500 controller systems. This module provides four single-ended output channels, allowing the PLC to interface with field devices that require variable control signals. To ensure maximum versatility across different industrial standards, the unit is software-configurable to support both voltage and current signals, including 0 to 10V, ±10V, 0 to 20 mA, and 4 to 20 mA.

Equipped with a 15-bit digital-to-analog converter (DAC), the 1769-OF4 delivers high-resolution signal reproduction for demanding motion and process control tasks. The module is engineered for stability, featuring low output ripple and integrated protection against short circuits and overvoltage conditions. This safeguards the internal backplane logic from potential electrical anomalies occurring on the field side.

Functional Applications

The 1769-OF4 acts as a critical bridge between digital control logic and physical mechanical action. Common implementations include:

• Variable Speed Drives: Providing frequency setpoints to AC and DC drives for precise motor speed regulation.

• Proportional Valves: Controlling the aperture of hydraulic or pneumatic valves to manage flow rates and system pressure.

• Actuator Control: Driving linear or rotary actuators in precision positioning applications.

• Data Transmission: Outputting process variables to remote data loggers, chart recorders, or analog panel meters.

Technical Specifications

• Number of Outputs: 4 Single-Ended Channels

• Resolution: 15 Bits (Unipolar); 14 Bits plus sign (Bipolar)

• Voltage Ranges: 0 to 10V DC, ±10V DC

• Current Ranges: 0 to 20 mA, 4 to 20 mA

• Conversion Rate: Approximately 2.5 ms for all channels

• Bus Current Draw: 120 mA @ 5.1V / 120 mA @ 24V

• Step Response: 2.9 ms to 95% of full scale

• Full Scale Error: ±0.35% (Voltage), ±0.53% (Current) at 25°C

• Power Supply Distance Rating: 8 modules (must be within 8 slots of power supply)

• Operating Temperature: 0°C to 60°C (32°F to 140°F)

• Relative Humidity: 5% to 95% non-condensing

• Dimentions:11.8 x 3.5 x 8.7 cm

Installation and System Compatibility

The 1769-OF4 features a modular design that facilitates easy installation onto a DIN rail or panel mount. It uses a removable terminal block to simplify wiring and maintenance. For optimal performance and signal integrity, the module should be located in close proximity to the system power supply to minimize voltage drops across the 1769 bus. The hardware is designed for high-vibration environments and maintains accurate output even in enclosures with elevated ambient temperatures.