Allen Bradley 1771-OFE1 4-Channel Analog Voltage Output

Product Overview

The Allen-Bradley 1771-OFE1 is a 4-channel isolated analog voltage output module for the PLC-5 platform. It delivers selectable voltage ranges of ±10 V DC, 0-10 V DC, and +1 to +5 V DC with 12-bit resolution, providing precise analog control of actuators, drives, and process devices.

Technical Specs

• Output channels: 4 individually isolated (1000 V) differential outputs
• Output ranges: ±10 V DC, 0-10 V DC, +1 to +5 V DC
• Resolution: 12 bits
• Accuracy: ±0.1% of full scale
• Settling time: 0.8 ms
• Channel update time: 1.6 ms (binary), 8 ms (BCD)
• Backplane current: 1.5 A @ 5 V DC
• Power dissipation: 7.9 W max
• Wiring arm: 1771-WH

Key Features

• Four individually isolated channels prevent ground loop interference
• Per-channel range selection jumpers for flexible configuration
• Block-transfer programming for data exchange with PLC-5 processors
• Overload protection on each output

FAQ

• What is the difference between OFE1 and OFE2? The OFE1 provides voltage outputs (±10V, 0-10V, 1-5V); the OFE2 provides current outputs (4-20 mA).
• How is the module configured? Range selection jumpers are set individually per channel on the module PCB.
• Which software programs it? RSLogix 5 or 6200 series software with block-transfer write instructions.

Installation Guide

1. Power down the 1771 I/O chassis.
2. Set the channel range jumpers on the module PCB per application requirements.
3. Insert the module into any slot except the leftmost.
4. Attach the 1771-WH wiring arm and connect analog output wiring.
5. Configure the module using block-transfer instructions and verify output scaling.

Selection Tips

• Select 1771-OFE1 for voltage-controlled devices; choose 1771-OFE2 for 4-20 mA current loops.
• For 0-50 mA outputs, use the 1771-OFE3.
• Verify chassis power budget: 1.5 A backplane current per module.