Allen-Bradley 1790D-0W6 6-Relay Output Base Module for Industrial Control

Product Introduction

In the evolving landscape of industrial automation, the demand for reliable and compact output modules has never been greater. The Allen-Bradley 1790D-0W6 6-relay Output Base Module addresses this need by providing a robust solution for switching loads in control systems. As part of the Allen-Bradley family, this module integrates seamlessly into DeviceNet networks, offering engineers a straightforward way to manage up to six independent relay outputs. Its design focuses on simplicity and durability, making it a practical choice for applications ranging from conveyor control to machine tool operations.

Technical Specifications

The 1790D-0W6 delivers precise performance with key parameters that ensure reliable operation. Each relay features Form A, normally open, single-pole single-throw contacts. The output voltage range supports 5…28.8V dc at 2.0 A resistive and 30V ac at 2.0 A resistive. The output current rating is 2.0 A for both dc and ac resistive loads. Minimum load requirements are 100 µA and 100 mV dc per input. On-state voltage drop is a maximum of 0.5V at 2.0 A with a resistive load at 24V dc. Initial contact resistance is 30 mΩ. Expected contact life reaches 300 Kcycles resistive and 100 Kcycles inductive. Off-state leakage current is a maximum of 1.5 mA. Output delay time is 10 ms maximum for both Off to On and On to Off transitions. Six green status indicators provide visual feedback. The common type is 1 point per 1 COM.

For the DeviceNet power supply, the voltage range is 11…28.8V dc with a nominal 24V dc. Power dissipation is 1.2 W maximum at 28.8V dc. Field power supply voltage range is 19.2…28.8V dc nominal 24V dc, with power dissipation of 10 mA at 28.8V dc per channel. Isolation between I/O and logic is provided by photocoupler isolation with an isolation voltage of 1250V ac rms. Wiring connects via a 37-pin D-shell connector.

Industry Applications

The 1790D-0W6 excels in manufacturing environments where multiple discrete outputs must be controlled independently. In a typical packaging line, this module can actuate solenoids, indicators, and small motors, leveraging its 2.0 A rating per channel to handle moderate loads. The 10 ms output delay ensures consistent timing for sequential operations. In material handling systems, the module's photocoupler isolation protects the control logic from voltage transients, enhancing system reliability. The 1 point per 1 COM configuration simplifies wiring and troubleshooting, reducing downtime.

Installation and Setup Guidance

Mount the 1790D-0W6 on a DIN rail in a clean, dry enclosure. Connect the DeviceNet power supply within the 11…28.8V dc range and the field power supply within 19.2…28.8V dc. Use the 37-pin D-shell connector for I/O wiring, ensuring each relay's common is wired per the 1 point/1 COM scheme. Verify that loads do not exceed the 2.0 A resistive rating. After installation, power up and check the six green status indicators to confirm proper operation. For detailed wiring diagrams, refer to the product manual.

Maintenance and Reliability

Periodically inspect the module for dust accumulation and ensure the enclosure remains within specified environmental limits. The expected contact life of 300 Kcycles resistive and 100 Kcycles inductive provides a baseline for scheduled replacement. Monitor the green status indicators for any anomalies. Because the module uses photocoupler isolation, it resists electrical noise, reducing the need for frequent maintenance. Always follow manufacturer guidelines for cleaning and handling.

Selection Guide and Purchasing Advice

When selecting the 1790D-0W6, verify that your system's DeviceNet network supports the 24V dc nominal power supply. Confirm that your loads are within the 2.0 A resistive rating per channel. For applications requiring higher current or different contact configurations, consider alternative modules. BluePLC Industrial offers this module with expert support to ensure compatibility with your existing Allen-Bradley infrastructure. Contact BluePLC Industrial for current availability and lifecycle status before ordering.