PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1771-OFE3 is a PLC-5 Analog Output Module manufactured for industrial control architectures. It provides four isolated differential analog current output channels. Each channel offers 1000 Volts of isolation. The operating current range extends from 0 to 50 milliamperes. The unit requires no external power source and draws 2.5 milliamperes of backplane current. It installs directly into an Allen-Bradley 1771 chassis slot.
This rack-mountable hardware module includes a protective conformal coating across its circuit assemblies. Supported data formats include natural binary or BCD scaling up to plus or minus 9999. The module interfaces with field wiring using the 1771-WH or 1771-WC wiring arm. Typical signal off delay is rated at 45 milliseconds for AC signals. Typical DC signal off delay is 50 milliseconds. Total weight of the module is 2.75 pounds.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Number of Outputs | 4 Isolated Differential Channels |
|---|
| Current Range | 0-50 mA |
|---|
| Isolation Voltage | 1000 V |
|---|
| Data Format | Natural Binary or BCD Scaling to +/- 9999 |
|---|
| Backplane Current | 2.5 mA |
|---|
| External Power Required | None |
|---|
| Coating | Conformal Coat |
|---|
| Typical AC Signal Delay (Off) | 45 (+/- 15) ms |
|---|
| Typical DC Signal Delay (Off) | 50 ms |
|---|
| Wiring Arm | 1771-WH, 1771-WC |
|---|
| Mounting | Rack Mountable (1771 Chassis) |
|---|
| Weight | 2.75 lbs (1.25 kg) |
|---|
TECHNICAL INFORMATION
Features
- Four isolated differential analog output channels
- 1000 Volt isolation rating across channels
- Output current range from 0 to 50 milliamperes
- Natural binary or BCD scaling up to +/- 9999
- Internal operation with zero external power requirements
- Backplane current consumption of 2.5 milliamperes
- Conformal coating for environmental protection
- Field connection support via 1771-WH and 1771-WC wiring arms
TECHNICAL INFORMATION
Connections / Interfaces
- 1771 chassis backplane edge connector
- 1771-WH or 1771-WC wiring arm interface
- Four isolated differential current output terminals
TECHNICAL INFORMATION
Installation Guidelines
- Mount the module directly into a 1771 I/O chassis slot.
- Connect field wiring to the 1771-WH or 1771-WC wiring arm.
- Secure the wiring arm to the chassis bracket.
TECHNICAL INFORMATION
Configuration Guidelines
- Select data format as either natural binary or BCD scaling to +/- 9999.
TECHNICAL INFORMATION
Compatibility
- Allen-Bradley PLC-5 systems
- Allen-Bradley 1771 I/O chassis
- Allen-Bradley 1771-WH wiring arm
- Allen-Bradley 1771-WC wiring arm
TECHNICAL INFORMATION
Lifecycle / Replacement Information
- Alternate part number notations include 1771-OFE3/A and 1771-OFE3/B.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSAllen-Bradley PLC-5 systems Allen-Bradley 1771 I/O chassis Allen-Bradley 1771-WH wiring arm Allen-Bradley 1771-WC wiring arm
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
What are the output ratings for the Allen-Bradley 1771-OFE3?
The module provides four isolated differential current outputs ranging from 0 to 50 mA with 1000 V isolation.
Does the 1771-OFE3 require external power?
No external power is required. The module draws 2.5 mA directly from the chassis backplane.
Which field wiring arm is used with the 1771-OFE3?
Field wiring connects via the Allen-Bradley 1771-WH or 1771-WC wiring arm.
What is the reference price of the Allen-Bradley 1771-OFE3?
Observed market pricing is approximately $319 USD for refurbished units. Pricing figures are indicative market reference only and are not a final quotation.
