Product Overview

The Allen-Bradley 1715-OB8DE is a high-availability digital output module engineered for the 1715 Redundant I/O platform. This module features 8 current-sourcing output points designed to operate within a 24V DC nominal voltage range (18–32V DC). It is specifically built for mission-critical control applications where system uptime is paramount, supporting fault-tolerant configurations that ensure continuous operation even in the event of hardware failure.

With a robust 1 Amp per point output capacity, the 1715-OB8DE effectively manages field-side actuators, solenoids, and indicators. The unit is optimized for energy efficiency, with a low system power dissipation of 3.0 W, and includes advanced surge transient immunity to protect sensitive logic from electrical disturbances in harsh industrial environments.

Technical Specifications

• Manufacturer: Allen-Bradley / Rockwell Automation

• Model Number: 1715-OB8DE

• Module Type: Digital Output (Current Sourcing)

• Channel Count: 8 Points

• Operational Voltage: 18–32V DC

• Output Rating: 1A per point (maximum)

• Power Dissipation: 3.0 Watts (System); 0.17 Watts (per field loop)

• Operating Temperature: -25°C to +70°C (-13°F to +158°F)

• Isolation Voltage: Tested at 500V AC for 60 seconds

• Shock & Vibration: 50g non-operating shock; 2g operating vibration

• Physical Dimensions: 166 x 42 x 118 mm

• Housing Rating: IP20 (Open-style)

Industrial Application and Reliability

The 1715-OB8DE is a staple in high-reliability sectors such as oil and gas, power generation, and chemical processing. Its ability to be hot-swapped within a redundant pair allows for maintenance without interrupting the process. The module's wide operating temperature range and high mechanical shock resistance make it suitable for deployment in remote or high-vibration control cabinets.

For diagnostics, the module incorporates a sophisticated status display that monitors both internal health and field-side conditions. It requires specific termination assemblies, typically the 1715-TADIB8DE, for proper field wiring. By utilizing 18 to 16 AWG copper conductors, the system ensures secure and thermally stable electrical connections throughout its service life.