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

Technical Specifications Breakdown

Key parameters for the 1790D-0W6 are listed below for quick reference:

Industry Applications

Packaging and Material Handling

In high-speed packaging lines, the 1790D-0W6 reliably switches solenoids and conveyor diverters. Its 2.0 A resistive rating handles typical DC actuators, while the 10 ms max response time supports moderate-speed cycles. The photocoupler isolation protects the DeviceNet network from field transients.

Machine Tool Control

For lathes and milling machines, this module drives indicator lamps and coolant valves. The 30V AC rating allows direct switching of small AC loads without external relays. The 300 Kcycle resistive contact life ensures long service in repetitive operations.

Process Skids and Remote I/O

On skid-mounted systems, the 1790D-0W6 reduces field wiring by consolidating six relay outputs into a single DeviceNet node. The 37-pin D-shell connector simplifies cable management, and the 1 point/1 COM common arrangement provides flexibility for mixed-load groups.

Installation and Setup Guidance

Mount the 1790D-0W6 on a DIN rail in a clean, dry enclosure. Connect the DeviceNet bus using a standard trunkline-drop topology. Ensure the DeviceNet power supply stays within 11…28.8V DC and the field power supply within 19.2…28.8V DC. Use a 37-pin D-shell mating connector with appropriate wire gauge for the load current. Apply a maximum of 2.0 A per channel resistive; for inductive loads, derate to 100 Kcycles expected life. Verify polarity on DC loads.

Maintenance and Reliability

Periodically inspect the module for dust accumulation and ensure the enclosure maintains proper airflow. Check the green status LEDs for normal operation. The expected contact life of 300 Kcycles resistive (100 Kcycles inductive) provides a guideline for preventive replacement in high-cycle applications. No field-serviceable parts inside; replace the module if performance degrades.

Reliable 6-Relay Output Control for Industrial Automation

Industrial control systems often require robust, isolated output switching for actuators, indicators, and pilot devices. The Allen-Bradley 1790D-0W6 6-relay Output Base Module delivers dependable discrete output control in a compact, DeviceNet-ready package. Designed for applications needing multiple relay outputs with galvanic isolation, this module helps reduce wiring complexity and panel space while maintaining signal integrity.

Compatibility and Integration

The 1790D-0W6 is a DeviceNet base module compatible with Allen-Bradley DeviceNet scanners and controllers. The 37-pin D-shell connector mates with standard I/O wiring cables. Use the 1 point/1 COM configuration to group loads by common return.

Selection Guide and Purchasing Advice

When selecting a relay output module for DeviceNet, consider the load type (resistive vs. inductive), voltage range, and channel count. The 1790D-0W6 suits applications requiring six Form A relay outputs with up to 2.0 A per channel. AutoDCSTech stocks this module and can verify current lifecycle status and availability before ordering. Contact our team for pricing and lead times.

Troubleshooting and Common Issues

If outputs do not energize, first check the DeviceNet power supply voltage (11…28.8V DC) and field power (19.2…28.8V DC). Verify the green status LEDs; if off, the module may not be receiving bus power or may have a network fault. For intermittent operation, inspect the 37-pin D-shell connector for bent pins or loose wiring. High leakage current (above 1.5 mA) in the off state suggests a failing relay; replace the module. If output delay exceeds 10 ms, check for excessive load capacitance or wiring inductance.