Allen-Bradley 1771-OFE2 B Analog Output Module Series B PLC A-B Rev 001

Allen-Bradley 1771-OFE2 B Analog Output Module

The Allen-Bradley 1771-OFE2 B is a high-performance analog output module designed to deliver precise current signals for industrial automation applications. As part of the 1771 I/O series, this module integrates seamlessly into Allen-Bradley PLC-5 systems, providing reliable and accurate control over various processes.

Key Features

• Four Individually Isolated Channels: Each of the four output channels operates independently, ensuring signal integrity and minimizing interference.
• 4-20 mA Output Range: The module delivers a standard 4-20 mA current output, suitable for controlling a wide array of industrial devices.
• 12-Bit Resolution: High-resolution digital-to-analog conversion allows for precise control over output signals.
• Single-Slot Design: Occupies a single slot in the 1771 I/O chassis, optimizing space within the control system.
• Compatibility: Fully compatible with Allen-Bradley PLC-5 processors and 1771 series I/O chassis.

Technical Specifications

• Output Channels: 4 individually isolated channels
• Output Signal Range: 4-20 mA
• Digital Resolution: 12-bit binary
• Backplane Current Draw: 1.5 A at 5V DC
• Power Dissipation: 7.9 Watts
• Thermal Dissipation: 26.9 BTU/hr
• Isolation Voltage: 850 VDC for 1 second per channel
• Operating Temperature Range: 0°C to 60°C (32°F to 140°F)
• Certifications: UL, CE, CSA approved for industrial use

Applications

The 1771-OFE2 B module is ideal for various industrial applications, including:

• Process control systems requiring precise current loop outputs
• Motor speed regulation and actuator positioning
• Integration with Variable Frequency Drives (VFDs), dampers, louvers, and valves
• Data transmission to measuring and recording instruments such as panel meters and data loggers

Installation and Wiring

For optimal performance and safety, adhere to the following installation guidelines:

• Install the module in any slot of the 1771 I/O chassis, ensuring proper keying at positions 10 and 12 / 26 and 28.
• Use 12-gauge stranded or solid wire with an insulation thickness of 3/64 inch (1.2 mm) for wiring output devices.
• Recommended cable type is Belden 8761.
• Secure wire terminations with a torque of 7-9 lbs/in.

The Allen-Bradley 1771-OFE2 B Analog Output Module offers robust and precise control capabilities, making it a valuable component in complex industrial automation systems.