1771-OFE3

Overview

The Allen-Bradley 1771-OFE3 Analog Output Module is a current output module with a 0-50mA output range, designed for PLC 5 systems.

Inputs and Outputs

• 4 Isolated: 1000 Volt Differential

Data Format

• Natural Binary or BCD: +/- 9999

Electrical Specifications

• Current Range: 0-50 mA

• Backplane Current: 2.5 mA

• Required External Power: None

• Typical AC Signal Delay (Off): 45 (+/- 15) ms

• Typical DC Signal Delay (Off): 50 ms

• Coating: Conformal

• Mounting: Rack

Functionality

• Converts: 12-bit binary and 4-digit BCD

• Compatible: Motor speed controllers, valve positioners, recorders, signal converters

• Transfers: Block transfer programming

• Write Block Transfer: 13 words

• Read Block Transfer: 5 words

Power and Performance

• Power: 2.5A at 5V from I/O chassis backplane

• Channel Update Time: 8ms per 4 channels (BCD); 1.6ms per 4 channels (Natural Binary)

• Max Power Dissipation: 13.1W

• Max Thermal Dissipation: 44.5 BTU/hr

Installation and Diagnostics

• Includes: 1771-WH wiring arm

• Installation: Any slot in 1771 I/O chassis

• Keying Bands: Pins 10-12 and 26-28

• Converts: °C, °F, gallons/minute, pounds/square inch

• Self-Check: Start-up

• Fault Indication: Red fault LED; green power status LED

• Isolation: 1500V optoelectrical

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