Product Summary
The 1794-OB16D is a high-performance Flex I/O digital output module from Allen-Bradley. It provides 16 nonisolated current sourcing outputs with onboard diagnostics. This module detects open and shorted field wiring, reducing downtime. It operates with a 24V DC nominal voltage and delivers 500mA per channel. Its maximum output current rating is 8.0A per module. The unit includes 16 yellow LED indicators for clear channel status. It supports hot-swapping under power for minimal system interruption. This module is ideal for demanding manufacturing environments.
Technical Specifications & Performance Review
The 1794-OB16D delivers exceptional performance for digital output control. Each of its 16 channels provides a maximum on-state current of 500mA. The module’s total output current rating reaches 8.0A. Its output voltage range spans from 10 to 31.2V DC. The nominal output voltage is 24V DC. The off-state leakage current remains below 0.5mA. This ensures precise signal integrity. The output signal delay is just 0.5 ms. This allows for rapid switching in time-critical applications. The module draws only 60mA from the 5V DC FlexBus. This low power consumption reduces overall system load. The maximum power dissipation is 4.8W at 31.2V DC. Its thermal dissipation reaches 16.4 BTU/hr. These metrics ensure stable operation within enclosures.
The module’s diagnostic capabilities are a key differentiator. The “D” suffix indicates full diagnostic functionality. It actively detects, indicates, and reports open outputs. It also identifies shorted field device wiring. This feature drastically reduces troubleshooting time. Maintenance teams can quickly isolate faulty field wiring. This minimizes unplanned production stoppages. The 16 yellow LED indicators provide immediate visual feedback. Each LED corresponds to a specific output channel. This allows operators to verify status at a glance. The module supports hot-swapping or removal under power. This eliminates the need for system restarts during module replacement. This feature saves valuable production time.
Installation & Compatibility Guide
Installing the 1794-OB16D is a straightforward process. The module mounts directly onto a compatible terminal base unit. It simply snaps onto a standard DIN rail. No additional tools are required for mounting. The module fits securely into the terminal base. This creates a solid connection with the I/O bus. The module does not require direct field wiring. All field device connections go through the terminal base. This design simplifies installation and maintenance.
The 1794-OB16D is compatible with several terminal base units. These include the 1794-TB3, 1794-TB3S, and 1794-TBKD. The 1794-TB3 terminal base provides 52 screw clamp terminals. It supports daisy-chaining of power and common to adjacent modules. This simplifies wiring in multi-module configurations. The module requires an external power supply. This supply must provide 10 to 31.2V DC. It should handle 56 to 78mA of current. The supply can tolerate up to 5% AC ripple.
This module supports multiple communication protocols. It works with ControlNet, DeviceNet, and EtherNet/IP networks. It also supports Universal Remote I/O. This flexibility allows integration into diverse control architectures. The module is available in XT versions for extreme environments. These versions reduce panel and maintenance costs. The standard operating temperature range is 0 to 55 °C. The relative humidity range is 5 to 95% noncondensing.
Logistics & Standard Packaging Details
- One Allen-Bradley 1794-OB16D Flex I/O Digital Output Module
- Product documentation and installation guide
- Standard anti-static packaging for safe transport
Express delivery shipping is available for this item. We ship via FedEx, UPS, and DHL to ensure fast and reliable delivery.
