1756-OF8H Analog Output Module Allen-Bradley

Allen-Bradley 1756-OF8H ControlLogix Analog Output HART Module

Core Technical Specifications

• Brand & Manufacturer: Allen Bradley
• Series: ControlLogix
• Model Number: 1756-OF8H
• Module Type: Analog Output Module with HART
• Number of Channels: 8 Differential Outputs
• Output Signal Ranges: Current: 0-20 mA, 4-20 mA | Voltage: +/-10 VDC
• Resolution: 15-16 Bits for all ranges
• Data Format: Integer mode & IEEE 32-bit floating point

Electrical & Performance Data

• Accuracy: 0.1% of range (Voltage), 0.5% of range (Current)
• Output Conversion: R-Ladder DAC, monotonic with no missing codes
• Settling Time (95%): ~8.5ms (Voltage), ~23ms (Current without HART), ~37ms (Current with HART)
• Current Draw: 230 mA @ 5.1V DC and 230 mA @ 24V DC
• Backplane Power: 6.54 Watts
• Power Dissipation: 4.92 Watts maximum
• Thermal Dissipation: 16.78 BTU/hour

Installation & Compatibility

• Required Terminal Block: 20-pin 1756-TBNH or 1756-TBSH (sold separately).
• Wire Size: 22-14 AWG (varies by terminal block).
• Mounting: Single-slot module for ControlLogix chassis.
• Isolation: 50 Volts continuous (output channels to backplane).
• Overvoltage Protection: +/- 24 VDC maximum.

Special Features & Diagnostics

• HART Protocol: Integrated single modem for communication with HART-enabled field devices.
• Open Circuit Detection: Available for current output configuration (output must be set < 0.1 mA).
• Calibration Interval: Standard recommendation is 12 months.
• Operating Temperature: 0°C to 60°C (32°F to 140°F) at 5-95% non-condensing humidity.
• Enclosure: Open style (requires a protective chassis).

Packaging & Shipping

• Condition: New and Original, in factory packaging.
• Package Includes: 1756-OF8H analog output module.
• Shipping: Worldwide delivery via DHL, FedEx, and UPS.
• Processing: Orders ship within 5 business days.
• Return Policy: 30-day return for unused items in original condition.

Frequently Asked Questions (FAQ)

• Q: What is the HART capability used for on the 1756-OF8H?
  A: The integrated HART modem allows digital communication with smart field devices for configuration, calibration, and diagnostics alongside the analog signal.
• Q: Can each output be configured independently?
  A: Yes, each of the 8 channels can be individually configured for either voltage (+/-10VDC) or current (0-20mA / 4-20mA) output.
• Q: What is the resolution and accuracy of this module?
  A: The module offers 15-16 bit resolution with an accuracy of 0.1% for voltage and 0.5% for current outputs.
• Q: What terminal block is required?
  A: You need a 20-pin removable terminal block, either the 1756-TBNH or the 1756-TBSH.
• Q: Do you have the 1756-OF8H in stock?
  A: Yes, we maintain stock of the 1756-OF8H for quick shipment.

For technical support or to order the versatile 1756-OF8H module, contact our team.

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

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