Product Overview

The Allen-Bradley 1771-OFE1 is a precision analog output module from the PLC-5 family, engineered for industrial automation systems requiring accurate voltage control. It provides three configurable output ranges: +1 to +5 VDC, -10 to +10 VDC, and 0 to +10 VDC, ensuring versatile application across a variety of control devices.

Equipped with a 12-bit digital-to-analog converter (DAC), the 1771-OFE1 ensures precise signal conversion with a fast settling time of 0.8 ms for resistive loads. Internal scan rates reach 8 ms per channel for BCD-scaled data or 1.6 ms per channel for binary signals without scaling, delivering reliable performance in real-time control operations.

This module can directly drive actuators such as control valves, dampers, adjustable frequency drives, and positioners, or serve as a signal source for panel meters, data loggers, and single-loop controllers. Each output features overload protection, safeguarding connected devices and enhancing system reliability.

The 1771-OFE1 occupies a single slot in the 1771 I/O chassis and draws 1.4 A at 5 V from the backplane, with maximum power dissipation of 7.9 W and thermal dissipation of 26.9 BTU/hr. It operates within 0–60°C (32–140°F) and can be stored down to -40°F, withstanding industrial vibration and shock. Built-in diagnostics and optoelectrical isolation of 1500 V protect control systems from electrical disturbances, ensuring consistent and safe analog output performance.

Key Features

• Model Number: 1771-OFE1

• Brand: Allen-Bradley

• Type: PLC-5 Analog Output Module

• Output Ranges: +1 to +5 VDC, -10 to +10 VDC, 0 to +10 VDC

• DAC Resolution: 12-bit

• Scan Rate: 8 ms per channel (BCD), 1.6 ms per channel (binary)

• Power Supply: 5 V DC from backplane, 1.4 A

• Power Dissipation: 7.9 W / 26.9 BTU/hr

• Isolation Voltage: 1500 V

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

• Storage Temperature: -40–60°C (-40–140°F)

• Weight: 0.6 kg

• Dimensions: 2.9 × 19.3 × 25.4 cm

• Origin: USA

• Availability: In Stock, Active Model

• Minimum Order Quantity: 1

Applications

• Control of actuators: valves, dampers, drives, and positioners

• Signal source for data loggers, panel meters, and loop controllers

• Industrial automation requiring precise voltage output and fast response

• Process control and monitoring systems

Technical Description

The 1771-OFE1 PLC-5 analog output module combines high-resolution voltage output with rapid signal response, making it ideal for precise industrial control. Its compact, single-slot design, robust protection, and high isolation rating ensure reliable performance in harsh environments.