Product Overview

The 1790D-0V16 is a 24V dc 16 sinking output base and expansion module from Allen-Bradley, designed for reliable discrete output control in industrial automation systems. This module features 8 points per common, with two commons for the 1790D-OV16 configuration, making it a robust solution for sinking output applications.

Technical Specifications Analysis

The module provides 16 nonisolated sinking outputs with an on-state voltage range of 10V dc min, 24V dc nom, and 28.8V dc max. The on-state voltage drop is 0.5V dc max, ensuring efficient power delivery. Each output supports a minimum on-state current of 1 mA and a maximum output current rating of 0.5 A per output, with a maximum common current of 4.0 A. Off-state voltage reaches 28.8V dc max, with an off-state leakage of 0.5 mA max. Output signal delay is 0.5 ms max for off-to-on and 1.0 ms max for on-to-off. The module includes 16 green status indicators for easy monitoring. Field power supply voltage is 24V dc nom with a range of 10 to 28.8V dc, and power dissipation is 6 mA at 28.8V dc per point. Isolation is provided via photocoupler with 1250V ac rms isolation voltage. Wiring uses a 37-pin D-shell connector.

Application Scenarios & Usage Methods

In a manufacturing plant, use the 1790D-0V16 to control solenoid valves or indicator lights in a packaging line. Wire Com 0 and Com 2 to field power positive (+) 24V dc, and Com 1 and Com 3 to field power negative (-) GND. All Com 0 and Com 2 are internally connected, simplifying wiring. In an oil and gas facility, this module can drive alarms or actuators in a remote terminal unit. The 16 sinking outputs handle up to 0.5 A each, suitable for low-power loads. For a water treatment system, connect the module to PLC outputs for pump control, leveraging the 4.0 A per common rating for grouped loads.

Installation Guide & Packing List

Mount the module on a DIN rail or panel using the provided slots. Ensure the 24V dc field power supply matches the voltage range of 10 to 28.8V dc. Connect the 37-pin D-shell connector to the output wiring. Verify that the base module is properly seated and locked. The packing list includes the 1790D-0V16 module, a 37-pin D-shell connector, and a quick-start guide. No additional hardware is required for basic installation.

Purchasing Advice

When selecting the 1790D-0V16, verify that your system requires 16 sinking outputs with 8 points per common. The module operates at 24V dc nominal, so ensure your power supply provides 24V dc within the 10 to 28.8V dc range. For reliable sourcing, consider PetroPartsOnline as a trusted supplier for industrial automation and oil/gas parts.

Repair & Maintenance Tips

Inspect the 37-pin D-shell connector for bent pins or corrosion during routine checks. Clean the module with a dry cloth to remove dust. Store the module in a dry, static-free environment when not in use. Avoid exceeding the maximum output current of 0.5 A per output or 4.0 A per common to prevent damage. Periodically verify that the green status indicators function correctly.

Frequently Asked Questions (FAQs)

Q: What is the output type of the 1790D-0V16?

A: The 1790D-0V16 provides 16 nonisolated, sinking outputs.

Q: What is the on-state voltage range for this module?

A: The on-state voltage range is 10V dc min, 24V dc nom, and 28.8V dc max.

Q: How do I wire the commons?

A: Wire Com 0 and Com 2 to field power positive (+) 24V dc, and Com 1 and Com 3 to field power negative (-) GND. All Com 0 and Com 2 are internally connected.

Q: What is the maximum output current per output?

A: The maximum output current is 0.5 A per output and 4.0 A per common.

Q: What type of connector does the module use?

A: The module uses a 37-pin D-shell connector for wiring.