Product Overview
The Allen-Bradley 1790-0B16X is a 24V DC 16-point sourcing output module designed for use with CompactBlock LDX distributed I/O systems. It provides 16 nonisolated sourcing outputs, each capable of 0.5 A maximum, with a total common current of 4.0 A. The module communicates via DeviceNet and features a 37-pin D-shell connector for field wiring. Its IP20 rating makes it suitable for protected environments.
Technical Specifications Breakdown
Key parameters for the 1790-0B16X are listed below for quick reference:
| Feature | Specification |
|---|---|
| Outputs per module | 16 points nonisolated, sourcing |
| On-state voltage | 10V dc min, 24V dc nom, 28.8V dc max |
| On-state current | 1 mA min per channel |
| Output current rating | 0.5 A max per output, 4.0 A max per common |
| Off-state leakage | 0.5 mA max |
| Output signal delay | Off to On: 0.5 ms max, On to Off: 1.0 ms max |
| Supply voltage | 24V dc nom, 11…28.8V dc |
| Power dissipation | 1.2 W max @ 28.8V dc |
| Isolation | I/O to logic: photocoupler isolation, 1250V ac rms |
| Wiring | 37-pin D-shell connector |
Industry Applications
For example, in automotive assembly stations, the 1790-0B16X can drive multiple pneumatic valves from a single compact block, reducing wiring complexity. Its fast 0.5 ms turn-on delay ensures precise timing in high-speed packaging machinery. The DeviceNet interface simplifies integration into existing Rockwell Automation architectures.
Installation & Setup Guidance
Mount the module on a DIN rail in a clean, dry enclosure. Connect the DeviceNet trunk line to the base module using the provided taps. For field wiring, use a 37-pin D-shell connector with appropriate cable. Ensure field power is within 10…28.8V DC. Verify that the total load current per common does not exceed 4.0 A. Configure the node address and baud rate via the network configuration tool.
Maintenance & Reliability
Periodically inspect the module for dust accumulation and ensure ventilation is not obstructed. Check that all connectors are securely fastened. The LED indicators provide quick visual status of each output. In harsh environments, consider additional protection to maintain the IP20 rating.
Compatibility & Integration
The 1790-0B16X is part of the CompactBlock LDX family and communicates over DeviceNet. It is compatible with any DeviceNet master scanner, such as ControlLogix or CompactLogix processors with a 1756-DNB or 1784-PCIDS module. The module supports both polled and change-of-state I/O data exchange.
Selection Guide & Purchasing Advice
When selecting the 1790-0B16X, confirm your system voltage and load requirements match the specifications above. For assistance with lifecycle status and availability, contact AutoDCSTech. We stock this module and can help you find the right part for your application.
Troubleshooting & Common Issues
If outputs do not energize, check the field power supply voltage and verify the DeviceNet network connection. Use the green LED indicators to confirm each output's state. If an output appears stuck on, measure the off-state leakage current; it should be below 0.5 mA. For persistent faults, inspect the 37-pin D-shell connector for bent pins or corrosion.
Availability & Condition at AutoDCSTech
| Part Number | 1790-0B16X |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
