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

Compact Temperature Control Solution

• The Allen-Bradley 1790D-T4R0 provides accurate RTD temperature monitoring in compact PLC systems.
• This CompactBlock LDX module sends digital temperature data through the DeviceNet network.

Measurement Capability

• Four independent RTD or resistance input channels ensure stable multi-point temperature sensing.
• Input resistance range spans 1 to 625 Ω for broad sensor compatibility.
• Resolution reaches 0.1°C per bit for precise control tasks.

Supported Sensor Types

• Platinum RTDs: 100 Ω, 200 Ω, and 500 Ω with α values of 0.00385 and 0.003916.
• Nickel RTDs: 100 Ω, 120 Ω, 200 Ω, and 500 Ω for mid-range temperature monitoring.
• Temperature coverage extends from -200°C to +850°C depending on sensor type.

Signal Processing Performance

• A 20-bit sigma-delta converter improves noise immunity and signal stability.
• Selectable notch filters range from 10 Hz to 500 Hz.
• Module scan time stays at 8 ms per channel for fast response.

Electrical and Power Details

• Brand: Allen-Bradley, Model: 1790D-T4R0, Series: CompactBlock LDX.
• DeviceNet supply voltage range supports 11–28.8V DC.
• Maximum power dissipation remains below 1.2 W.

Installation and Diagnostics

• DIN rail and screw mounting allow fast installation in control cabinets.
• Open wire detection flags faults as out-of-range values.
• Four red and green indicators show channel and module status.

Package, Warranty, and Shipping

• Package includes one original Allen-Bradley RTD input base module.
• Warranty period covers 12 months.
• Shipping methods include FedEx, UPS, and DHL.

Professional FAQ

• How many RTD points does this module support?
  It supports four independent temperature measurement points.
• What data format does the module transmit?
  The module sends 16-bit signed integer temperature values.
• Does the module require expansion units?
  No expansion modules connect to this RTD base.
• How does the module handle signal noise?
  Adjustable notch filters reduce electrical interference.
• What happens if an RTD wire breaks?
  The system reports an out-of-range fault condition.

Contact Information

• Email: info@oiltechcontrols.com
• WhatsApp: +86 158 8020 0923

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