1771-OFE1 Ser B (PU)

Allen Bradley Bulletin 1771 | Analog Output Module

Allen Bradley Bulletin 1771 | 4-Channel Analog Output Module, supports 0-10V, ±10V, and 4-20mA, Series B

The Allen-Bradley 1771-OFE1 is a high-performance analog output module designed for the 1771 Universal I/O platform. It serves as a critical interface between a PLC-5 controller and analog field devices, converting digital data from the processor into proportional analog signals. This module is engineered for precise control of devices such as variable speed drives, proportional valves, and analog actuators in complex industrial processes.

This Series B module features 4 independent, differential analog output channels. It is highly versatile, providing users with the ability to configure each channel for a variety of standard signal ranges, including 0 to 10VDC, ±10VDC, or 4 to 20mA current loops. The module uses a 12-bit resolution to ensure smooth and accurate signal reproduction, making it ideal for applications where fine-tuned control and high repeatability are required.

For reliable operation in noisy factory environments, the 1771-OFE1 provides robust optical isolation between the field-side analog signals and the sensitive backplane logic. It utilizes the standard 1771-WH field wiring arm, which allows for the module to be swapped or serviced without the need to disconnect individual field wires. The front panel includes a dedicated "Active" LED and a "Fault" LED, providing immediate visual feedback on the operational status of the module.

Built for heavy industrial duty, the 1771-OFE1 operates reliably within a temperature range of 0–60°C (32–140°F) and 5–95% non-condensing humidity. It draws 750mA at 5VDC directly from the chassis backplane. The assembly is designed to withstand industrial-grade shock and vibration and is UL listed, CSA certified, and CE compliant, ensuring it meets international standards for performance and safety in global automation systems.

Key Specifications:

  - Outputs: 4 Independent Differential Channels
  - Signal Ranges: 0–10V, ±10V, 4–20mA
  - Resolution: 12-Bit
  - Backplane Current: 750mA @ 5VDC
  - Wiring Arm: 1771-WH
  - Platform: 1771 Universal I/O (PLC-5)
  - Series: B