Allen Bradley 1791D-8B8P Compactblock I/O Combination Base Block

Product Introduction

The Allen-Bradley 1791D-8B8P CompactBlock I/O Combination Base Block is a compact, integrated distributed I/O solution designed for field-level automation systems. It combines both digital input and output functions into a single module, reducing system complexity and minimizing installation space requirements.

This module provides 8 sinking digital inputs and 8 sourcing digital outputs, operating at 24 VDC. With built-in DeviceNet communication capability, it enables direct connection to industrial networks without the need for additional adapters, improving system efficiency and reducing wiring costs.

Its robust design ensures stable operation in industrial environments, making it a practical choice for machine builders and system integrators seeking a reliable and space-saving I/O solution.

---

Product Specifications

---

Applications

• Factory automation systems – Used for decentralized control, reducing wiring between field devices and central PLC systems

• Material handling equipment – Suitable for conveyors, sorting systems, and packaging machinery requiring mixed I/O signals

• Compact machinery – Ideal for equipment where space efficiency and integration are critical design factors

• Process control systems – Provides reliable signal acquisition and actuator control in industrial processes

• Automotive production lines – Supports distributed I/O architecture commonly used in high-speed assembly environments

---

Advantages

• Integrated I/O functionality – Combines input and output channels in one module, simplifying system design

• Compact size – Reduces panel space usage and allows installation in confined areas

• DeviceNet communication – Enables efficient and stable network integration, reducing wiring and improving scalability

• High reliability – Designed for continuous industrial operation with stable electrical performance

• Flexible compatibility – Supports both sinking inputs and sourcing outputs, making it adaptable to various field devices

• Reduced installation cost – Minimizes cabling and simplifies system architecture

FAQ

1. What type of input signals are supported by this module?
   It supports sinking (NPN) digital input signals typically used with industrial sensors.

2. What is the output signal type of this module?
   The outputs are sourcing (PNP), providing positive voltage to drive loads.

3. Can the module operate independently without a network?
   No, it requires a DeviceNet network for communication and control.

4. What types of devices can be connected to the outputs?
   It can control devices such as solenoid valves, relays, and indicator lamps within rated limits.

5. Is this module suitable for distributed I/O systems?
   Yes, it is specifically designed for distributed I/O architecture.

6. How is the module integrated into a control system?
   It connects to a DeviceNet network and communicates with a PLC via a scanner module.

7. Does the module support diagnostic functions?
   Yes, it provides status feedback and fault diagnostics through the DeviceNet network.

8. What is the advantage of mixed I/O in one module?
   It reduces hardware count, simplifies wiring, and improves installation efficiency.

9. What power supply is required for operation?
   A standard 24 VDC industrial power supply is required.

10. Is it compatible with Allen-Bradley PLC systems?
    Yes, it integrates seamlessly with controllers that support DeviceNet communication.

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.