Allen-Bradley 1790D-T4R0 | CompactBlock LDX RTD Input Module

Product Overview: Allen-Bradley 1790D-T4R0 RTD Base Module

Key Technical Specifications and Features

• Brand & Model: This module is manufactured by Allen-Bradley with the model number 1790D-T4R0.
• Input Channels: It provides four independent input channels for RTD temperature measurement.
• Compatible Sensors: The module supports a wide range of RTD types including Pt100, Pt200, Pt500, and Nickel sensors with different alpha values.
• High-Speed Scanning: It scans each channel every 8 milliseconds for extremely fast data updates and real-time control.
• Excellent Resolution: A 20-bit Sigma-Delta converter provides 16-bit output resolution at 0.1°C or 0.1°F per bit.
• Measurement Accuracy: It maintains an impressive 0.2% of full scale accuracy within its operating temperature range.
• Advanced Filtering: Configurable notch filters (10, 25, 50, 60, 100, 250, 500 Hz) eliminate electrical noise interference.
• Diagnostic Feature: Built-in open wire detection immediately identifies sensor connection problems.

Detailed Operating Parameters

• Input Resistance Range: The module accepts resistance inputs from 1 to 625 ohms.
• Temperature Ranges: Supported ranges vary by sensor type, for example Pt100 sensors from -200 to +850°C.
• Excitation Current: It provides a stable 1 mA excitation current for accurate RTD measurements.
• Power Requirements: The DeviceNet interface requires 24V DC nominal (11V DC minimum). Separate field power is also 24V DC nominal.
• Operating Environment: The module functions reliably in ambient temperatures from 0 to 55 degrees Celsius.
• Electrical Isolation: It features photocoupler isolation (1250V AC for 60s) between I/O and logic circuits.
• Connection & Wiring: It uses a terminal block with M3.0 screws, with a maximum torque of 7 lb-in.

Frequently Asked Questions (FAQ)

• Q: Is this module brand new and original?
  A: Yes, we supply only 100% new, genuine, and original Allen-Bradley products.
• Q: How many RTD sensors can I connect to this module?
  A: The 1790D-T4R0 provides four separate channels, allowing connection of up to four RTD sensors.
• Q: What types of RTD sensors are supported?
  A: It supports various Pt100, Pt200, Pt500, and Nickel RTDs with different temperature ranges and alpha values.
• Q: How fast does the module read temperature data?
  A: It scans each channel every 8 milliseconds, providing extremely fast response times.
• Q: Do you have this module in stock?
  A: Yes, we typically maintain stock for immediate shipment of this popular module.
• Q: What is your shipping timeframe?
  A: We process and ship orders within 5 business days after payment confirmation.
• Q: Can I expand this module for more than 4 channels?
  A: No, this module does not accept expansion. For more than 4 points, you need to install additional 1790D-T4R0 modules.
• Q: What happens if an RTD wire breaks?
  A: The module's open wire detection feature will signal an "out of range" status to your controller.

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