Allen-Bradley 1771-OFE2 Analog Output Module 4–20mA 5VDC PLC A-B Ser B FW B

Allen-Bradley 1771-OFE2 Analog Output Module

The Allen-Bradley 1771-OFE2 is a high-performance analog output module designed for integration with PLC-5 controllers. It provides precise control over analog devices through its four individually isolated channels, each delivering a 4–20 mA current output.

Key Features

• Individually Isolated Channels: Each of the four output channels is isolated, ensuring reliable and interference-free operation.
• High Resolution: The module offers a 12-bit binary resolution, allowing for accurate signal representation and control.
• Rapid Response: With a Digital-to-Analog Converter (DAC) settling time of up to 0.8 milliseconds, the 1771-OFE2 ensures swift signal processing.
• Robust Isolation: Channels are tested to withstand 850 VDC for 1 second, providing enhanced protection against electrical disturbances.
• Efficient Power Usage: The module draws 1.50 Amperes from the backplane and dissipates 7.9 Watts of power, maintaining energy efficiency.

Installation and Compatibility

The 1771-OFE2 is designed for seamless integration into any 1771 I/O chassis, occupying a single slot. It utilizes the 1771-WC field wiring arm, facilitating straightforward installation and maintenance. Proper keying is achieved by setting between pins 10 and 12, and 26 and 28, ensuring correct module placement.

Applications

This module is ideal for controlling various final control elements, including:

• Variable Frequency Drives (VFDs)
• Valves
• Dampers
• Louvers

Additionally, it can transmit signals to measuring and recording instruments such as signal isolators, converters, panel meters, and data loggers, making it versatile for diverse industrial applications.

Technical Specifications

• Number of Channels: 4 individually isolated
• Output Current Range: 4–20 mA
• Digital Resolution: 12-bit binary
• Backplane Current Draw: 1.50 Amperes
• Power Dissipation: 7.9 Watts
• Thermal Dissipation: 26.9 BTU/hr
• Isolation Voltage: 850 VDC for 1 second
• DAC Settling Time: 0.8 milliseconds maximum

The Allen-Bradley 1771-OFE2 Analog Output Module stands as a reliable and efficient solution for precise analog control in industrial automation systems.