Product Summary
The Allen-Bradley 1794-OB16D delivers 16 nonisolated digital outputs with integrated diagnostics. This module detects open or shorted field wiring instantly. It provides a maximum on-state current of 500mA per channel. The unit operates on a nominal 24V DC supply. You can insert or remove this module under power without system shutdown.
Product Procurement & Buyer Guide
Selecting the correct Flex I/O module requires careful consideration of your specific application needs. The 1794-OB16D is a diagnostic module that actively monitors field device health.
This module detects and reports open wires or shorted outputs. This feature reduces troubleshooting time dramatically. It minimizes costly unplanned downtime in critical processes.
Engineers choose this module for its robust 8.0A total output current rating. Each of the 16 channels handles up to 500mA continuously. This capacity suits high-density solenoid and indicator lamp control.
The 1794-OB16D draws only 60mA from the FlexBus backplane. This low power consumption saves energy and reduces heat buildup. It operates efficiently within a 0 to 55 °C temperature range.
Procurement teams benefit from its broad compatibility with terminal base units. The module works directly with the 1794-TB3, 1794-TB3S, and 1794-TBKD bases. This flexibility simplifies inventory management and system design.
It uses standard 24V DC external power with 5% AC ripple. The power supply current ranges from 56 to 78mA. This requirement aligns with common industrial power rails.
The unit supports multiple network protocols including ControlNet and DeviceNet. It also operates over EtherNet/IP and Universal Remote I/O. This versatility ensures seamless integration into existing architectures.
Expert Technical Evaluation & Performance Review
The 1794-OB16D provides fast output signal delays of just 0.1ms. This speed is critical for precise machine control applications. It ensures rapid response from on-to-off and off-to-on states.
The module’s off-state leakage current is a mere 0.5mA maximum. This low leakage prevents false activation of sensitive loads. It guarantees reliable signal integrity in demanding environments.
Power dissipation reaches a maximum of 4.8W at 31.2V DC. Thermal dissipation is rated at 16.4 BTU/hr. These values require adequate panel ventilation for long-term stability.
The isolation voltage is rated at 50V between outputs. This provides basic protection against ground loops. It is suitable for nonisolated sourcing output applications.
Sixteen yellow LED indicators provide clear channel status visibility. Each LED corresponds to one specific output channel. Operators can quickly identify active or faulted points.
XT versions are available for extreme environment operation. These variants reduce overall panel and maintenance costs. They extend module life in harsh industrial settings.
The unit’s compact design saves valuable enclosure space. Its DIN rail mounting allows fast and secure installation. This design supports efficient panel layout and cable management.
Logistics & Standard Packaging Details
Express delivery shipping is available via FedEx, UPS, and DHL.
