Product Overview

The Allen-Bradley 1769-OF4CI is a Compact I/O analog output module. This module has four differential, individually isolated channels. It generates current signals for field devices. Applicable output ranges are 0-20 mA or 4-20 mA. The module works with MicroLogix 1500 and CompactLogix controllers.

Technical Specifications

The Allen-Bradley 1769-OF4CI has four isolated output channels. Full scale analog ranges are 0-21 mA and 3.2-21 mA. Digital resolution is 16 bits for unipolar operation.

Key electrical parameters include:

• Resolution (4-20mA): 15.59 bits (0.323 µA/bit)

• Resolution (0-20mA): 15.91 bits (0.323 µA/bit)

• Conversion Rate: 110 ms per channel

• Non-linearity: ±0.05% of full scale

• Accuracy: ±0.35% of full scale

• Repeatability: ±0.005%

• Accuracy Drift: ±0.0058% FS per °C

The module has a power supply distance rating of 8 modules. Slot width is 1 (single slot). UPC/GTIN is 10781180908658.

Output Characteristics

The 1769-OF4CI drives various loads with precision. Resistive load range is 0 to 500 Ohms. Output inductive load rating is 0.1 mH. Output impedance is less than 1 MOhm.

Key output features include:

• Open circuit protection: Yes

• Short circuit protection: Yes

• Output excess voltage protection: Yes

• Maximum short circuit current: 21 mA

• Field calibration: None required (guaranteed by hardware design)

The module maintains full capability at maximum short circuit current. This protects the module during field wiring faults.

Data Formats

The 1769-OF4CI supports multiple data formats. You can choose the format that best suits your control application.

Available data formats include:

• Raw/Proportional data for custom scaling

• Engineering units for direct process values

• Scaled for PID for closed-loop control

• Percent full range for simple scaling

The module generates a unique data table for each installation. This table includes channel addresses, module mode bits, and runtime parameters.

Calibration and Self-Test

The 1769-OF4CI requires no field calibration. The hardware design guarantees accuracy without adjustment. Auto-calibration runs every time the module powers up.

Self-test features include:

• Power cycle auto-calibration for accuracy

• Power cycle self-test for diagnostics

• High and low clamp settings to limit outputs

• Active value comparison against defined limits

During self-test, the module is temporarily unresponsive. It then enters active operation automatically. New output values are compared to clamp settings before application.

Compatible Controllers and Adapters

The 1769-OF4CI works with several controllers and adapters. It is compatible with MicroLogix 1500 controllers. It also works with CompactLogix controllers.

For remote I/O applications, use these adapters:

• 1769-ADN (DeviceNet communication adapter)

• 1769-AENTR (Ethernet communication adapter)

Compatible power supplies include:

• 1769-PA2 (AC input)

• 1769-PB2 (DC input)

• 1769-PA4 (AC input, higher capacity)

• 1769-PB4 (DC input, higher capacity)

Module Features

The 1769-OF4CI includes configurable channel parameters. You can set output range selection per channel. Module inhibition and description fields are available. Slot assignment is flexible within the chassis.

Additional features include:

• Electrostatic discharge protection (use grounded workstations)

• Status indicators for channel health

• Channel diagnostics for fault detection

• Replaceable door (part number 1769-RD)

The module should be kept in a static shield box when not in use. Avoid touching the bus connector or connector pins.

Installation Guidelines

Follow these steps for proper installation:

1. Mount the 1769-OF4CI on DIN rail or panel.

2. Maintain 2 inches clearance on all sides for cooling.

3. Use Belden 8761 shielded cable for all analog outputs.

4. Connect outputs to loads within 0-500 Ohms resistance.

5. Configure output range (0-20mA or 4-20mA) in software.

6. Set high and low clamps to prevent unsafe outputs.

Do not exceed 8 modules between this module and the power supply. Use copper wire rated for 90°C. Solid wire size range is 22-14 AWG. Stranded wire size range is 22-16 AWG.

Package Contents

The box includes the following items:

• Allen-Bradley 1769-OF4CI analog output module

• Removable terminal block for field wiring

• Replacement door (1769-RD)

• Installation instructions manual

• Static shield box for storage

Common FAQs

Q1: What output current ranges does the 1769-OF4CI support?
A: The 1769-OF4CI supports 0-20 mA and 4-20 mA ranges. Full scale analog ranges are 0-21 mA and 3.2-21 mA respectively.

Q2: Does this module require field calibration?
A: No, the 1769-OF4CI requires no field calibration. The hardware design guarantees accuracy without any adjustment.

Q3: What is the power supply distance rating for this module?
A: The power supply distance rating is 8 modules. Do not mount the 1769-OF4CI more than eight slots away from the power supply.

Q4: What is the conversion rate for each output channel?
A: Conversion rate is 110 ms per channel on the 1769-OF4CI. This applies to all four isolated outputs.

Q5: What cable does the manufacturer recommend for this module?
A: The manufacturer recommends Belden 8761 shielded cable for the 1769-OF4CI. This ensures proper noise immunity for analog signals.

Dimensions and Environment

The product has these physical specifications:

• Module Height: 118 mm (4.65 inches)

• Module Width: 35 mm (1.38 inches)

• Module Depth: 87 mm (3.43 inches)

• Module Weight: 270 g (0.60 lbs)

• Shipping Weight: 2 lbs (0.91 kg)

• Shipping Dimensions: 8 x 8 x 5 inches

• Operating Temperature: 0°C to 60°C

• Storage Temperature: -40°C to 85°C

• Non-linearity: ±0.05% full scale

• Digital Resolution: 16 bits

• Module Error Boundary: ±0.55%

• Slot Width: 1

• UPC: 10781180908658

• UNSPSC: 32151705

The Allen-Bradley 1769-OF4CI analog output module delivers precise current control. Its four isolated channels suit actuator and valve control applications. Order the 1769-OF4CI for your next CompactLogix system expansion.