Allen-Bradley 1769-OF8C 8-Channel Analog Output Compact I/O

Overview

The Allen-Bradley 1769-OF8C is an 8-channel compact analog output module for CompactLogix systems. It delivers precise current signals with high reliability and protection features suitable for industrial control applications.

Technical Specifications

• Manufacturer: Allen-Bradley

• Series / Product Line: CompactLogix

• Model / Part Number: 1769-OF8C

• Module Type: 8-Point Analog Current Output Module

• Outputs: 8 single-ended

• Output Current Ranges: 0–20 mA, 4–20 mA

• Full Scale Range: 0–21 mA, 3.2–21 mA

• Resolution: 16-bit unipolar; 15.59–15.91 bits depending on range

• Bus Current Draw: 5 VDC @ 145 mA, 24 VDC @ 185 mA

• Maximum Heat Dissipation: 2.69 W

• Conversion Rate (All Channels): 5 ms

• Step Response: < 2.9 ms

• Load Resistance: Resistive 0–500 Ω, Inductive max 0.1 mH

• Accuracy: ±0.35% full scale @ 25°C; temperature drift ±0.0058% per °C

• Output Ripple: ±0.05% @ 0–50 kHz

• Nonlinearity: ±0.05%

• Repeatability: ±0.05%

• Module Error / Offset Error: ±0.55%

• Open / Short-Circuit Protection: Yes, max 21 mA short-circuit

• Overvoltage Protection: Yes

• Rated Working Voltage: 30 V AC / 30 V DC

• Isolation Voltage: 500 V AC / 710 V DC for 1 min, output to bus

• Weight: 0.60 lb (270 g)

• Dimensions: 118 x 35 x 87 mm (H x W x D), height with mounting tabs 138 mm

• Slot Width: 1

• Mounting: DIN rail or panel mount

• Compatible Power Supplies: 1769-PA2, 1769-PB2, 1769-PA4, 1769-PB4

• Optional 24V DC Class 2 Supply Voltage Range: 20.4–26.4 VDC

• Power Supply Distance Rating: Up to 8 modules

• Terminal / Retaining Screw Torque: 0.68 N·m / 0.46 N·m

• Wire Size: Solid 22–14 AWG, Stranded 22–16 AWG, Cu-90°C

• Replacement Accessories: Terminal Block 1769-RTBN18, Door Label 1769-RL2, Door 1769-RD

Key Features

• 8 high-precision analog outputs with multiple current ranges

• Full protection: open/short circuit, overvoltage, and transient suppression

• High-resolution output with minimal ripple and low drift

• Compact size, suitable for DIN rail or panel mounting

• Compatible with multiple CompactLogix power supplies and configurations

Application Scenarios

The 1769-OF8C is ideal for:

• Driving field devices with analog current outputs, such as valves, actuators, and transducers

• High-accuracy process control applications requiring stable outputs

• Compact control cabinets with limited space for I/O modules

Similar Model Comparison

• 1769-OF8C – 8-channel analog current output, high-density

• 1769-OF4C – 4-channel analog output, smaller footprint

• 1769-OF16 – 16-channel analog output module for larger systems

FAQs

Q: Does the module require field calibration?
A: No field calibration is required; outputs are factory calibrated.

Q: What protection features are included?
A: Open/short-circuit, overvoltage, and spike suppression.

Q: Which power supplies are compatible?
A: 1769-PA2, 1769-PB2, 1769-PA4, 1769-PB4 with up to 8 modules per supply.