Allen-Bradley 1769-OF8C - Analog Output Module

Allen-Bradley 1769-OF8C Analog Current Output Module

Core Technical Specifications

• Manufacturer & Brand: Allen-Bradley
• Model Number: 1769-OF8C
• Module Type: Analog Current Output Module
• Number of Channels: 8 single-ended current output channels.
• Output Ranges: User-selectable 0-20 mA or 4-20 mA per channel.
• Full Scale Range: 0-21 mA and 3.2-21 mA.

Output Performance & Accuracy

• Resolution: High 16-bit digital-to-analog conversion.
• Overall Accuracy: ±0.35% of full scale at 25°C (77°F).
• Conversion Rate: 5 milliseconds for all eight channels simultaneously.
• Step Response: Fast response of less than 2.9 ms to reach 63% of final value.
• Output Impedance: Greater than 1 Ohm.

Electrical Ratings & Protection

• Load Specifications: Supports resistive loads of 0-500 Ω (including wire resistance).
• Maximum Inductive Load: 0.1 mH.
• Short-Circuit Protection: Yes, with a maximum short-circuit current of 21 mA.
• Power Consumption: Draws 145 mA at 5V DC and 185 mA at 24V DC.
• Heat Dissipation: 2.69 Watts maximum.
• External Power: Requires a 24V DC power supply.

Diagnostics & Indicators

• Module Status LED: Single green "OK" LED indicates normal operation.
• Channel Diagnostics: Bit-level reporting for over-range, under-range, open wire, and high load resistance.
• Open Wire Detection: Detects faults within approximately 5 milliseconds.
• Protection Features: Includes overvoltage and overcurrent protection.

Physical Design & Installation

• Enclosure: None (open-style); requires installation in a protected cabinet.
• Dimensions: Approximately 4.65 x 1.38 x 3.43 inches (118 x 35 x 87 mm).
• Terminal Block: Removable, finger-safe terminal block for secure wiring.
• Wire Specification: Use 22-14 AWG solid or 22-16 AWG stranded copper wire (90°C).
• Mounting: Installs in CompactLogix or MicroLogix 1500 chassis as a single-slot module.

Environmental & Application Data

• Operating Temperature: 0°C to 60°C (32°F to 140°F).
• Typical Applications: Drives control valves, VFDs, positioners, panel meters, and data loggers.
• Calibration: Does not require field calibration, maintaining stable performance.
• Isolation: Provides channel-to-earth ground isolation.

Frequently Asked Questions (FAQ)

• Q: What current output ranges are available?
  A: Each channel of the 1769-OF8C can be configured for either 0-20 mA or 4-20 mA operation.
• Q: What is the resolution and accuracy of this module?
  A: It provides 16-bit resolution with an overall accuracy of ±0.35% of full scale.
• Q: Does it have diagnostic features?
  A: Yes, it includes per-channel diagnostics for open wire, over-range, and under-range conditions, with a status LED.
• Q: What controllers is this module compatible with?
  A: It works with 1769/1768 CompactLogix controllers and the MicroLogix 1500 system.
• Q: What is your shipping and return policy?
  A: We ensure fast dispatch and offer a 30-day return policy for items in original, unused condition.

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Contact Information Inquiries: sales@nex-auto.com , +86 153 9242 9628