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- Allen Bradley
- 1746-IB8
- PLC Module/Rack
- USA
- 150 × 130 × 40 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.
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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-IB8 — Comprehensive Technical Overview
1. Product Introduction
The Allen Bradley 1746-IB8 is a digital DC input module designed for modular PLC systems. It is intended to receive discrete signals from field devices such as proximity sensors, push buttons, and limit switches, and convert these signals into logic data that can be processed by the controller.
This module provides 8 input channels and is configured as a sinking input type, meaning it is typically used with sourcing field devices. It serves as an interface between field-level signals and the control system, ensuring stable and accurate signal acquisition.
Installed within a chassis, the module communicates with the processor via the backplane, enabling fast and reliable data transfer for industrial automation tasks.
2. Brand and Series
- Brand: Allen-Bradley
- Series: SLC 500 Series
- Product Type: Digital DC Input Module (Sinking)
The SLC 500 series is a modular control platform widely used in industrial automation. The 1746-IB8 provides a compact and efficient solution for discrete input requirements.
3. Product Parameters
Below is a structured technical parameter table for the 1746-IB8:
| Parameter | Specification |
|---|---|
| Model | 1746-IB8 |
| Product Type | Digital DC Input Module |
| Series | SLC 500 |
| Number of Inputs | 8 channels |
| Input Type | Sinking |
| Nominal Input Voltage | 24 V DC |
| Input Voltage Range | 10–30 V DC |
| Input Current | approx. 6–8 mA per channel |
| Input Delay (ON) | approx. 8 ms |
| Input Delay (OFF) | approx. 8 ms |
| Off-State Voltage | max. 5 V DC |
| Off-State Current | max. 1 mA |
| Isolation | 1500 V AC (field to backplane) |
| Backplane Current (5V) | approx. 50–70 mA |
| Backplane Current (24V) | 0 mA |
| Power Dissipation | approx. 1.5 W |
| Status Indicators | 8 LEDs (one per channel) |
| Wiring | Terminal block |
| Mounting | SLC chassis slot |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Dimensions | approx. 150 × 130 × 40 mm |
| Weight kg（ ） | 0.20 kg |
4. Product Applications
The 1746-IB8 is used in a wide range of industrial automation scenarios where DC input signals must be monitored:
- Detection of proximity and photoelectric sensors
- Monitoring of push buttons and selector switches
- Limit switch signal acquisition
- Machine status feedback systems
- Conveyor and material handling systems
- Packaging and assembly equipment
- General discrete signal monitoring applications
It is especially suitable for systems that require a moderate number of input channels with reliable performance.
5. Product Advantages
Compact and efficient design
Provides 8 input channels in a small footprint, ideal for space-constrained installations.
Stable DC signal processing
Optimized for 24V DC industrial systems, ensuring consistent performance.
Fast response time
Allows quick detection of changes in field signals.
Electrical isolation
Protects the control system from electrical noise and voltage spikes.
Clear visual diagnostics
LED indicators make it easy to monitor input status and troubleshoot issues.
Easy integration
Fully compatible with modular PLC systems for seamless installation and expansion.
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-IB16 | SLC 500 | 16-point DC input module | 24V DC | 249 × 166 × 55 | 0.39 |
| 1746-IB32 | SLC 500 | 32-point DC input module | 24V DC | 145 × 171 × 130 | 0.45 |
| 1746-IA8 | SLC 500 | 8-point AC input module | 120V AC | 145 × 171 × 130 | 0.30 |
| 1746-OB8 | SLC 500 | 8-point DC output module | 24V DC | 145 × 171 × 130 | 0.35 |
| 1746-A4 | SLC 500 | 4-slot chassis | External | 280 × 171 × 145 | 1.5 |
These modules are often combined to build complete and scalable I/O 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 |