Allen-Bradley 1790D-TN4V0 4-Channel Analog Voltage Input Module

Introduction to the 1790D-TN4V0

Struggling with precise analog signal acquisition in your automation system? The Allen-Bradley 1790D-TN4V0 delivers reliable 4-channel analog voltage input for demanding industrial environments. This compact module integrates seamlessly with DeviceNet networks, offering accurate 0-10V input with 12-bit resolution. Designed for efficiency, it supports up to two discrete expansion modules, making it a flexible choice for system scaling.

Technical Specifications

The 1790D-TN4V0 features four single-ended, nonisolated analog inputs with a voltage range of 0-10V. Its 12-bit unipolar resolution provides 1/4096 steps (2.44 mV/bit), ensuring precise measurement. Conversion time is 10 ms per channel, and overall accuracy reaches 0.2% of full scale at 0-55°C. Input impedance is 500 kΩ minimum, with insulation resistance of 20 MΩ minimum at 250V DC between isolated circuits.

DeviceNet power supply voltage is 24V DC nominal (range 11-28.8V DC), with power dissipation of 1.2W max at 28.8V DC. Field power supply voltage is 24V DC nominal (range 21.6-26.4V DC, +10%), dissipating 1.5W max at 26.4V DC. Isolation between I/O and logic uses photocoupler isolation, with a type test isolation voltage of 1250V AC RMS for 60 seconds. DeviceNet to logic and field power are nonisolated. Four red/green I/O status indicators provide clear operational feedback.

Industry Applications

This module excels in process control, packaging, and material handling systems where accurate voltage signal monitoring is critical. For example, in a plastic extrusion line, the 1790D-TN4V0 can read temperature sensor outputs (0-10V) to regulate heater zones, ensuring consistent product quality. Its fast 10 ms per channel conversion enables real-time adjustments, reducing waste and downtime.

Installation & Setup Guidance

Mount the module securely using the provided terminal block (M3.0 screws) with a maximum torque of 7 lb-in. Use copper or copper-clad aluminum conductors for wiring. Ensure DeviceNet power is within 11-28.8V DC and field power within 21.6-26.4V DC. The module can accommodate a maximum of two discrete expansion modules—plan your system layout accordingly. No calibration is required, simplifying initial setup.

Maintenance & Reliability

Routine inspection of connections and status indicators helps maintain reliable operation. The module’s 0.2% full-scale accuracy over 0-55°C ensures stable performance in typical industrial environments. With no calibration needed, maintenance is minimal, reducing total cost of ownership. For extended life, avoid exposing the module to excessive vibration or moisture beyond its rated specifications.

Buying Guide & Selection Advice

Before purchasing, verify that your system supports DeviceNet communication and that power supplies meet the specified voltage ranges. The 1790D-TN4V0 is ideal for applications requiring 4-channel analog voltage input with moderate resolution. Contact BluePLC Industrial for current availability, lifecycle status, and any replacement options if needed. BluePLC Industrial is your trusted partner for Allen-Bradley automation components.