Allen‑Bradley 1771‑OFE2B Analog Output Module

The Allen‑Bradley 1771‑OFE2B is an analog output module designed for Rockwell PLC‑5 and 1771 I/O rack systems. It receives digital control values from the PLC‑5 controller and converts data into configurable 4‑20mA or voltage analog signals to regulate field valve positioners, actuators and variable‑speed drives for closed‑loop process control.

This plug‑in chassis module supports multiple output ranges and channel diagnostic detection. It is widely kept as spare parts for maintenance and retrofitting of legacy 1771 automation cabinets used in chemical, water treatment and traditional manufacturing plants.

Main Specifications

• Brand: Allen‑Bradley (Rockwell Automation); Model: 1771‑OFE2B; Type: Analog Output Module
• Applicable System: PLC‑5 controller, 1771 series I/O rack platform
• Core Tasks: Digital‑to‑analog conversion, configurable analog signal output, channel fault detection, status monitoring
• Signal Interface: Field analog wiring terminal assembly, 1771 backplane connector
• Installation: Plug‑in slot‑mount on standard 1771 I/O chassis rack
• Signal Type: Configurable 4‑20mA current and voltage analog output for field control devices
• Operating Environment: 0℃ ~ +60℃, 5%‑95% RH non‑condensing, industrial anti‑vibration grade
• Mechanical: Standard 1771 series module form‑factor, IP20 cabinet‑mount installation
• Certifications: CE, conforms to Rockwell legacy automation EMC requirements

Core Functions

• Receive digital control commands transmitted by PLC‑5 CPU and convert digital values into high‑precision analog signals to control field actuators and regulating valves.
• Support flexible configuration of current or voltage output ranges to match different types of smart valve positioners and process instruments on site.
• Built‑in diagnostic function detects open load and short‑circuit faults, helping maintenance personnel quickly locate wiring or equipment failures.
• Exchange data with PLC‑5 controller through 1771 rack backplane bus to realize continuous closed‑loop adjustment of industrial production processes.
• Chassis plug‑in structure facilitates quick disassembly and replacement during maintenance of old automation control cabinets.
• Industrial‑hardened circuit design ensures long‑term stable operation for renovation projects of end‑of‑life PLC‑5 control systems.

Application Scenarios

• Spare‑part replacement for legacy PLC‑5 automation cabinets in chemical, water treatment and traditional manufacturing industrial sites.
• Analog output hardware for closed‑loop regulation of valves and actuators in 1771 I/O rack control systems.
• Maintenance backup inventory for renovation and after‑sales maintenance projects of end‑of‑life Rockwell PLC‑5 automation equipment.
• Matching analog output module cooperating with PLC‑5 CPU, 1771 chassis, terminal arms and analog input modules.
• Retrofit replacement for aged output modules with signal drift, channel failure and abnormal diagnostic alarms.

• Global aftermarket spare supply for automation maintenance teams maintaining Rockwell legacy industrial‑control equipment worldwide.