Allen-Bradley 1790D-TN4C0 Analog Current Input Module

Allen-Bradley 1790D-TN4C0 Analog Current Input Module

Core Technical Specifications

• Brand & Model: Manufactured by Allen-Bradley, this module's part number is 1790D-TN4C0.
• Input Channels & Signal: It features 4 single-ended, non-isolated channels for analog current input.
• Input Range: The software-configurable range is 0 to 20 milliamps (4-20 mA default).
• Resolution & Accuracy: It offers 12-bit unipolar resolution with an overall accuracy of 0.2% of full scale.
• Conversion Speed: The data conversion time is 10 milliseconds per channel.
• Input Impedance: The input circuit presents a 249 Ohm impedance to the signal source.

Electrical & Performance Details

• Bit Resolution: Provides fine resolution: 3.90 µA/bit for 4-20 mA and 4.88 µA/bit for 0-20 mA.
• Power Supply (DeviceNet): Requires 24V DC nominal (11-28.8V DC range), with max 1.2W dissipation.
• Power Supply (Field): Field power is 24V DC nominal (21.6-26.4V DC range), with max 1.5W dissipation.
• Isolation: Features photocoupler isolation (I/O to logic) tested at 1250V AC RMS for 60 seconds.
• Calibration: This module is stable and does not require user calibration.
• Insulation Resistance: Minimum 20 MΩ at 250V DC between insulated circuits.

Installation & Physical Attributes

• Wiring: Connections use a terminal block (M3.0) with a maximum screw torque of 7 lb-in.
• Indicators: Four red/green I/O status LEDs provide clear channel status.
• Data Format: Converts input current to 12-bit binary data (0000 to 0FFF hex).
• Expansion: The 1790D-TN4C0 base can accommodate up to two discrete expansion modules.
• Operating Temperature: Specified accuracy is maintained from 0 to 55 degrees Celsius.

Frequently Asked Questions (FAQ)

• Is this module new and genuine Allen-Bradley?
  Yes, we supply only 100% new and original Allen-Bradley products like the 1790D-TN4C0.
• What current signals can it read?
  It is configurable for standard 4-20 mA or full 0-20 mA input ranges.
• How fast does it update readings?
  It scans and converts each of its 4 channels in 10 milliseconds.
• Does it need calibration?
  No, the module is designed for stable operation and does not require calibration.
• What is your shipping time and policy?
  We process orders within 5 business days and offer a 30-day return policy.
• What network does it use?
  The 1790D-TN4C0 is designed for easy connection to DeviceNet networks.

For integration support or to purchase the 1790D-TN4C0 and other CompactBlock LDX I/O modules, contact our experts.

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