Allen-Bradley 1794-OB16D Flex I/O Digital Output Module

Product Overview

The Allen-Bradley 1794-OB16D is a Flex I/O digital output module. It includes built-in diagnostics for field wiring. This module has 16 nonisolated outputs. It operates at a nominal 24V DC voltage. The module supports a maximum output current of 8.0A. Each channel can handle up to 500mA. The off-state leakage is only 0.5mA max. The output signal delay is just 0.5 ms. This module is part of the Rockwell Automation 1794 series. It is designed for demanding industrial environments. The module can be inserted or removed under power. This feature saves time and reduces system downtime. The 1794-OB16D uses a terminal base unit. Compatible bases include 1794-TB3, 1794-TB3S, and 1794-TBKD. It communicates via ControlNet, DeviceNet, or EtherNet/IP. The module has 16 yellow LED status indicators. These LEDs show the status of each output channel. The module also has XT versions for extreme environments. This reduces panel and maintenance costs.

Application Scenarios

This module works well in factory automation systems. It controls solenoids, valves, and indicator lights. It is ideal for material handling applications. The diagnostics feature helps in packaging machinery. It detects open or shorted field wiring quickly. This reduces troubleshooting time significantly. The module is used in assembly lines and conveyors. It also works in process control systems. The hot-swappable design supports continuous operations. It is perfect for remote I/O installations. The module fits in both new and retrofit projects. It is compatible with various communication networks. This makes it flexible for different system architectures. The 1794-OB16D is a reliable choice for discrete control. It ensures high uptime and productivity in plants.

Technical Specifications

The module has a nominal output voltage of 24V DC. The voltage range is 10 to 31.2V DC. The maximum on-state current is 500mA per channel. The total module current is 8.0A. The off-state leakage is 0.5mA max. The output signal delay is 0.5 ms. The isolation voltage is 50V. The Flexbus current is 60mA at 5V DC. The power dissipation is 4.8W at 31.2V DC max. The thermal dissipation is 16.4 BTU/hr. The operating temperature is 0 to 55 °C. The relative humidity range is 5 to 95% noncondensing. The external power supply requires 10 to 31.2V DC. It also needs 56 to 78mA current. The module weighs approximately 0.3 kg. It is mounted on a DIN rail. The module dimensions are standard for Flex I/O. It has 16 current sourcing outputs. The outputs are nonisolated from each other.

Installation & Maintenance Guide

Install the module on a standard DIN rail. Snap it onto the rail firmly. Connect the terminal base unit first. Use 1794-TB3, 1794-TB3S, or 1794-TBKD bases. Wire the field devices to the terminal block. Ensure the power supply is within the voltage range. The module can be inserted under power. This allows for easy maintenance without system shutdown. Check the LED indicators for status. A yellow LED shows the output state. Use the diagnostics to find wiring faults. Replace the module by removing it from the base. Do not touch the internal circuits. Keep the module clean and dry. Follow standard safety procedures. Use only approved cables and connectors. The module is designed for long life. Regular inspection of wiring is recommended. Use FedEx, UPS, or DHL for shipping replacements.

Packing List

One Allen-Bradley 1794-OB16D module. One installation guide. No terminal base is included. The base must be ordered separately. The module is packaged in anti-static material. It is shipped in a sturdy box. Use FedEx, UPS, or DHL for delivery. The package is labeled with the part number. It includes a barcode for inventory tracking. The weight of the package is about 0.5 kg. The package dimensions are standard for Flex I/O modules. Ensure the package is handled with care. Do not drop or crush the box. Store in a cool, dry place. Remove from packaging only at installation time.