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- Allen Bradley
- 1746-IO8
- PLC Module/Rack
- USA
- 145 × 171 × 130 mm
- 0.2kg
- Xiamen, China
- New & In Stock
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We have a 10-year logistics and express cooperation agreement, so our products can be shipped to any place in the world.
Brand new and original
Our products are imported in bulk from the place of origin. Because of the cooperative relationship, our products are all original and 100% new.
24-hour service
We provide 7*24 hours service to our customers. We will be there whenever you need us.
Price advantage
All our products are priced very favorably because we have our own warehouse and supply.
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Allen Bradley 1746-IO8 — Comprehensive Technical Overview
1. Product Introduction
The Allen Bradley 1746-IO8 is a compact combination digital input/output module designed for modular PLC systems. It integrates both input and output capabilities into a single unit, making it ideal for applications where limited space and mixed signal handling are required.
This module provides a total of 8 I/O points, consisting of 4 AC input channels and 4 relay output channels. The inputs are designed to receive standard industrial AC signals, while the outputs use relay contacts capable of switching both AC and DC loads.
The 1746-IO8 is installed in a chassis and communicates with the controller through the backplane. It is widely used in compact automation systems where efficient use of slots and simplified wiring are important considerations.
2. Brand and Series
- Brand: Allen-Bradley
- Series: SLC 500 Series
- Product Type: Combination Digital Input/Output Module
The SLC 500 series is a modular PLC platform used in a wide range of industrial control applications. The 1746-IO8 enhances system flexibility by combining input and output functions in one module.
3. Product Parameters
Below is a detailed and structured parameter table for the 1746-IO8:
| Parameter | Specification |
|---|---|
| Model | 1746-IO8 |
| Product Type | Combination Digital I/O Module |
| Series | SLC 500 |
| Total I/O Points | 8 |
| Inputs | 4 channels |
| Outputs | 4 channels |
| Input Voltage | 120 V AC |
| Input Voltage Range | 85–132 V AC |
| Input Frequency | 47–63 Hz |
| Output Type | Relay (Normally Open) |
| Output Voltage Range | 5–265 V AC / 5–125 V DC |
| Output Current | 1.5 A @ 120V AC / 1.2 A @ 24V DC |
| Backplane Current (5V) | approx. 60 mA |
| Backplane Current (24V) | approx. 45 mA |
| Signal Delay (ON/OFF) | approx. 35–45 ms |
| Isolation | Optical and relay isolation |
| Power Dissipation | approx. 3 W total |
| Status Indicators | LED per I/O point |
| Wiring | Terminal block |
| Mounting | SLC chassis slot |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Dimensions | approx. 145 × 171 × 130 mm |
| Weight kg（ ） | 0.20 kg |
4. Product Applications
The 1746-IO8 is widely used in industrial automation systems that require both input monitoring and output control within a compact configuration:
- Small machine control systems
- Conveyor and material handling equipment
- Packaging and assembly automation
- Relay control and signal acquisition systems
- Control panels with limited space
- Retrofit and upgrade projects
- Distributed I/O points in modular systems
It is especially useful in applications where combining input and output in a single module reduces system complexity.
5. Product Advantages
Integrated I/O functionality
Combines input and output channels in one module, reducing hardware requirements.
Space-efficient design
Saves valuable chassis space by minimizing the number of modules needed.
Flexible relay outputs
Supports both AC and DC loads, increasing versatility in control applications.
Reliable AC input processing
Ensures accurate detection of standard 120V AC signals.
Electrical isolation
Provides protection against electrical noise and voltage transients.
Simplified wiring and maintenance
Reduces wiring complexity and makes system troubleshooting easier.
6. Recommended Models (Same Series or Related)
Below are 5 related models within the same SLC 500 series or similar I/O category:
| Model | Series | Function | Power | Dimensions (mm) | Weight kg（ ） |
|---|---|---|---|---|---|
| 1746-IO12 | SLC 500 | 12-point combination I/O | 120V AC | 152 × 152 × 51 | 0.30 |
| 1746-IB16 | SLC 500 | 16-point DC input module | 24V DC | 249 × 166 × 55 | 0.39 |
| 1746-IA8 | SLC 500 | 8-point AC input module | 120V AC | 130 × 50 × 150 | 0.23 |
| 1746-OX8 | SLC 500 | 8-point relay output module | AC/DC | 145 × 171 × 130 | 0.40 |
| 1746-A7 | SLC 500 | 7-slot chassis | External | 381 × 171 × 145 | 1.8 |
These modules are often combined to build flexible and scalable control systems.
7. Recommended Popular Models (Same Brand)
Below are 5 widely used models from the same brand in industrial automation systems:
| Model | Product Type | Key Function | Power | Dimensions (mm) | Weight kg（ ） |
|---|---|---|---|---|---|
| 1747-L551 | PLC CPU | Modular controller | 24V DC | 145 × 140 × 130 | 0.95 |
| 1756-L73 | PLC Processor | High-performance control | 24V DC | 145 × 140 × 130 | 0.90 |
| 1769-L33ER | Compact PLC | Integrated automation control | 24V DC | 118 × 87 × 87 | 0.50 |
| 1734-IB8 | I/O Module | Digital input module | 24V DC | 56 × 12 × 75 | 0.12 |
| 1756-OB16E | Digital Output Module | 16-point output | 24V DC | 137 × 140 × 130 | 0.40 |