Allen Bradley 1746-OB8 Digital Output Module

Product Introduction

The Allen Bradley 1746-OB8 Output Module is a digital DC output module designed for use within the SLC 500 control system. It provides current sourcing digital outputs, enabling reliable control of external loads such as relays, solenoids, indicators, and actuators in industrial automation environments.

This module features 8 independent output channels, allowing flexible and efficient signal distribution from the controller to field devices. Designed for open-style chassis installation, the 1746-OB8 integrates seamlessly into SLC 500 racks and supports stable operation across a wide range of DC control applications.

---

Product Specifications

---

Applications

• Digital output control for relays, contactors, and solenoid valves

• Industrial automation systems using Allen Bradley SLC 500 PLCs

• Manufacturing lines requiring reliable DC output switching

• Process control environments with multiple discrete actuators

• Machine control systems needing compact multi-channel output modules

• Panel-mounted control cabinets with open-style chassis architecture

---

Advantages

• Eight independent output channels enabling compact and efficient system design

• Current sourcing architecture suitable for a wide range of DC field devices

• Wide DC voltage range, supporting diverse industrial control requirements

• Open-style chassis compatibility, ensuring seamless integration with SLC 500 systems

• Reliable electrical isolation, improving system stability and fault tolerance

• Proven Allen Bradley design, offering long-term reliability in industrial environments

FAQ

1. How does current sourcing output differ from current sinking output?
   Current sourcing outputs supply positive voltage to the load, allowing current to flow from the module to the field device.

2. How are the output channels controlled by the PLC processor?
   Each output channel is individually controlled through the SLC 500 backplane and user program logic.

3. What type of loads can be driven by this module?
   It can drive DC loads such as relays, solenoids, indicators, and other discrete actuators.

4. Is electrical isolation provided between channels and the backplane?
   Yes, isolation is implemented to protect the controller and improve system reliability.

5. How does the module handle output switching operations?
   Solid-state switching enables fast and consistent output control without mechanical wear.

6. Can multiple output channels be activated simultaneously?
   Yes, all channels can be controlled independently and operate concurrently as required.

7. How does the module behave during power-up conditions?
   Output states are controlled by PLC startup configuration and program logic execution.

8. What role does the open-style chassis play in system integration?
   It allows direct installation into SLC 500 racks, ensuring secure electrical and mechanical connection.

9. How is output status monitored by the control system?
   Output status is monitored through PLC diagnostics and program feedback mechanisms.

10. What design considerations improve reliability in industrial environments?
    Robust isolation, solid-state outputs, and industrial-grade components ensure stable long-term operation.

Related Models

---

Popular Models

Excellent PLC Co., Ltd. has a large number of brand new and original PLC and DCS spare parts, with more than 60 cooperative countries. All products are guaranteed for 1 year and delivered to you by high-quality express. We are committed to using the best products and the most favorable prices to meet the needs and friendship of our customers. We have won the trust of thousands of customers, including these excellent customers.

As for the delivery time, when we receive your order requirements, we will arrange for warehouse personnel to test and verify the products. After you place the order, we will send it to you within 24 hours.