Allen-Bradley 1790D-TN4C0 Analog Input Module CompactBlock LDX

1790D-TN4C0 Analog Input Module Overview

• Brand: Allen-Bradley
• Series: CompactBlock LDX
• Model: 1790D-TN4C0
• Module type: Analog current input
• Author: Powergear X Automation

Core Functions

• Reads analog current signals
• Supports industrial transmitters
• Works on DeviceNet networks
• Software configurable ranges
• No calibration required

Input Channel Design

• Total channels: 4
• Signal type: Single-ended
• Input range options:
  • 4 to 20 mA (default)
  • 0 to 20 mA
• Resolution: 12-bit unipolar

Signal Accuracy & Speed

• Conversion speed: 10 ms per channel
• Accuracy: ±0.2% full scale
• Stable reading at 0 to 55 °C
• Binary output format

Electrical Characteristics

• Input impedance: 249 ohms
• Insulation resistance: 20 MΩ minimum
• I/O to logic isolation via photocoupler
• Isolation test: 1250 Vac for 60 seconds

Power Requirements

• DeviceNet supply:
  • Nominal: 24 VDC
  • Range: 11 to 28.8 VDC
• Max DeviceNet power loss: 1.2 W
• Field supply range: 21.6 to 26.4 VDC
• Field power loss: 1.5 W max

Status & Diagnostics

• Four dual-color LED indicators
• Channel-level status feedback
• Fast fault detection

Mechanical & Wiring

• Weight: 0.38 lb (0.17 kg)
• Terminal type: M3 screw block
• Max screw torque: 7 lb-in
• Accepts copper conductors

Application Benefits

• Ideal for pressure transmitters
• Reliable flow signal capture
• Compact footprint saves space
• Low heat generation
• Simple system expansion

Warranty & Shipping

• Factory warranty: 12 months
• Shipping options:
  • FedEx
  • UPS
  • DHL

Professional FAQ

• Can this module handle noisy signals?
• Yes. Stable readings come from strong filtering.
• Is external calibration needed over time?
• No. The design keeps accuracy stable.
• Does wiring length affect response?
• Short runs improve speed and clarity.
• Can it work with older DeviceNet nodes?
• Yes. It follows standard DeviceNet rules.
• Is it suitable for panel mounting?
• Yes. Compact size fits tight cabinets.

Contact Information Inquiries:
sales@powergearx.com |
+86 18030005825

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