Allen-Bradley 1790-0V16X 16 Sinking Output Module

Allen-Bradley 1790-0V16X 24V DC Sinking Output Module

Product Introduction

The 1790-0V16X module belongs to the CompactBlock LDX series. It offers 16 sinking output points for distributed I/O applications. Each channel handles up to 0.5A of continuous current. Additionally, the module achieves a fast off-to-on delay of only 0.5ms. You benefit from photocoupler isolation rated at 1250V ac rms. Therefore, the 1790-0V16X performs reliably in electrically noisy environments.

Technical Specifications

Output Characteristics

The 1790-0V16X delivers 16 nonisolated sinking output points. The on-state voltage ranges from 10V dc minimum to 28.8V dc maximum, with 24V dc nominal. Meanwhile, the on-state voltage drop stays below 0.5V dc max. Each channel requires a minimum on-state current of 1 mA. The off-state leakage current does not exceed 0.5 mA max.

For signal timing, the off-to-on delay is 0.5 ms max, while the on-to-off delay reaches 1.0 ms max. Sixteen green status LEDs monitor every channel. Moreover, each output supports 0.5A max, and the common side handles up to 4.0A max. The common type uses 8 points per 2 commons for the 1790-0V16X.

Important Sinking Wiring Rules

This module requires specific wiring for sinking operation. First, wire Com 0 and Com 2 to field power positive (+24V dc). Next, wire Com 1 and Com 3 to field power negative (GND). Note that all Com 0 and Com 2 terminals are internally connected. Similarly, Com 1 and Com 3 share internal connections. Following this method ensures proper sinking output behavior.

General Electrical Data

Field power supply voltage nominally sits at 24V dc. Its operating range extends from 10V dc to 28.8V dc. Power dissipation for the base module reaches 1.2W max at 28.8V dc. Furthermore, each point dissipates 6 mA at 28.8V dc. The DeviceNet power supply also requires 24V dc nominal, with a range of 11…28.8V dc.

Isolation and Connectivity

Isolation between I/O and logic uses photocoupler technology. The isolation voltage is rated at 1250V ac rms. For wiring, the module employs a 37-pin D-shell connector. This standard connector simplifies field wiring and reduces installation time.

Mechanical and Environmental Parameters

The 1790-0V16X carries an IP20 protection rating. It is designed for use inside control cabinets. Operating temperature typically ranges from 0°C to 55°C. Storage temperature spans -25°C to 85°C. Relative humidity should stay between 5% and 95% non-condensing. Vibration resistance meets IEC 60068-2-6 standards. Shock resistance complies with IEC 60068-2-27.

Installation Guide

First, disconnect all power sources before wiring. Next, mount the 1790-0V16X onto a DIN rail or panel. Then, connect the 37-pin D-shell cable to the module. After that, wire the field power supply correctly. Specifically, connect Com 0 and Com 2 to +24V dc. Then connect Com 1 and Com 3 to GND. Finally, attach the DeviceNet network cable to the base module.

Furthermore, verify each output load stays under 0.5A. Also check that the total current per common remains below 4.0A. Use copper conductors with a wire gauge of 0.5 to 1.5 mm². Tighten all screws to the torque listed in the manual. Once wiring finishes, apply power and check the green status LEDs.

Packaging List

• 1790-0V16X module (1 unit)

• 37-pin D-shell connector (1 piece, pre-attached)

• Installation instructions sheet

• DIN rail mounting clips (2 pieces)

Note: No certificates or warranty documents are included.

Shipping

We ship all orders via FedEx, UPS, or DHL. Delivery typically takes 3-7 business days worldwide.

Frequently Asked Questions (FAQ)

1. What is the difference between 1790-0B16X and 1790-0V16X?
The 1790-0B16X uses sourcing outputs (switches positive). The 1790-0V16X uses sinking outputs (switches negative). Choose based on your field device wiring.

2. Why must I wire Com 0 and Com 2 to +24V dc on the 1790-0V16X?
Sinking outputs require the common to connect to positive voltage. This allows the output transistor to switch the load to ground.

3. Can I mix sourcing and sinking modules on the same DeviceNet network?
Yes. The 1790-0V16X works with other 1790 series modules on the same network. Each module has its own field power wiring.

4. What happens if I wire Com 0 to GND by mistake?
The outputs will not turn on correctly. You might also damage the internal transistors. Always follow the sinking wiring guide above.

5. Does the 1790-0V16X support short-circuit protection?
The module has no built-in short-circuit protection. You should add external fuses (0.5A fast-blow) for each output channel.