Product Overview

The Allen-Bradley 1769-OB8 provides localized digital output control for 1769-based automation platforms. This module features 8 sourcing digital outputs designed to command DC field devices such as solenoids, pilot lights, and small relays. Fully compatible with CompactLogix controllers and MicroLogix 1500 systems, the 1769-OB8 facilitates modular expansion in high-vibration industrial environments. We supply this unit in 100% Brand New original condition, ensuring peak performance and electrical integrity for your control architecture.

Technical Specifications

The 1769-OB8 utilizes high-current sourcing circuitry to deliver reliable power to field-side actuators.

Engineering Advantages

The 1769-OB8 addresses the specific needs of rugged machine control where high per-point current and signal isolation are mandatory.

• High Current Delivery: Unlike high-density modules that limit current per point, the 1769-OB8 delivers a full 1.0 Amp per output. This allows the module to drive larger solenoids and inductive loads directly without the need for interposing relays.

• Galvanic Protection: An integrated 750V DC isolation barrier separates the field-side wiring from the sensitive controller backplane. This prevents electrical surges or ground faults in the field from damaging the CPU or other rack modules.

• Streamlined Troubleshooting: Dedicated status LEDs for each of the 8 channels provide instant visual verification of output states. Maintenance teams can identify logic-to-field mismatches at a glance without utilizing external testing equipment.

• Removable Terminal Block (RTB): The module features a removable connector that permits pre-wiring of the cabinet. During replacement, technicians swap the hardware without touching the field wires, drastically reducing Mean Time to Repair (MTTR).

• Hazardous Environment Reliability: With Class I Div 2 certification, this module operates safely in environments where flammable gases or vapors may be present, extending its application to chemical and oil and gas processing.

FAQs

• What does "Sourcing" output mean for the 1769-OB8?

  In a sourcing configuration, the 1769-OB8 supplies the positive voltage (+24V DC) to the load. The other side of your field device must connect to the common/negative terminal of your power supply.

• Can I mix this module with 1769-IB8 input modules?

  Yes. The 1769 Compact I/O system allows you to mix input, output, and specialty modules in any order, provided you stay within the power supply's current limits and the controller's maximum module count.

• Does the 1769-OB8 require an external power supply for the field side?

  Yes. While the backplane powers the module's internal logic, you must connect an external 24V DC power source to the module terminals to provide the switching current for your field devices.

• What is the maximum number of modules I can add to a CompactLogix rack?

  This depends on the specific controller model (e.g., L32E, L35E) and the "Power Supply Distance Rating." Most 1769-OB8 modules must be installed within 8 slots of the power supply.