ProductPRODUCT
Featured products
Contact Us
- Allen Bradley
- 1746SC-IM8I
- PLC Module/Rack
- USA
- 145 × 35 × 140 mm
- 0.5kg
- Xiamen, China
- New & In Stock
- T/T, PayPal, Western Union
- 1 Year
- 1-3 Working Days
- DHL, UPS, TNT, FedEx and EMS.
- 24-Hour Service
- COO
- 4
Our advantage
Global Logistics
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.
| Company Information | |||
| [email protected] | |||
| Mobile | +8615980777398 | ||
| +8615980777398 | |||
| 15980777398 |
Allen Bradley 1746SC-IM8I — Detailed Technical Overview
1. Product Introduction
The Allen Bradley 1746SC-IM8I is an isolated digital input module designed for use within the SLC 500 PLC platform. It belongs to the enhanced third-party “SC” module family, which provides extended functionality and improved electrical isolation compared to standard modules.
This module offers eight individually isolated input channels, allowing each input to operate independently with its own common reference. This design significantly improves noise immunity and protects the control system from electrical interference or voltage spikes originating from field devices.
The 1746SC-IM8I is particularly suitable for applications where signal integrity is critical, such as environments with high electrical noise, mixed signal sources, or long cable runs. It integrates directly into the SLC 500 chassis and communicates via the backplane, ensuring seamless compatibility with existing PLC systems.
2. Product Parameters
Technical Specifications
| Parameter | Value |
|---|---|
| Model | 1746SC-IM8I |
| Series | SLC 500 (SC Enhanced Modules) |
| Module Type | Isolated Digital Input Module |
| Number of Inputs | 8 (individually isolated) |
| Input Voltage Range | 10–30 V DC (typical industrial range) |
| Nominal Input Voltage | 24 V DC |
| Input Type | Sourcing / sinking compatible |
| Input Current | Approx. 5–10 mA per channel |
| Isolation Type | Channel-to-channel and field-to-backplane isolation |
| Isolation Voltage | Up to 1500 V AC |
| Input Delay (ON) | Approx. 5 ms |
| Input Delay (OFF) | Approx. 5 ms |
| Backplane Current | Approx. 0.1 – 0.15 A @ 5V DC |
| Power Dissipation | Low (approx. 2–4 W total) |
| Status Indicators | 8 LEDs (per channel) |
| Wiring Configuration | Individual common per input |
| Operating Temperature | 0 to 60°C |
| Environmental Rating | Industrial environment compatible |
| Installation Type | Rack-mounted |
| Dimensions (mm) | 145 × 35 × 140 |
| Weight (kg) | 0.25 – 0.5 kg |
3. Product Applications
The 1746SC-IM8I is designed for applications requiring high signal integrity and electrical isolation.
Typical applications include:
- Industrial environments with high electrical noise
- Signal acquisition from sensors with independent grounding
- Process control systems with distributed field devices
- Long-distance signal transmission systems
- Monitoring of switches, proximity sensors, and digital signals
- Systems requiring isolation between input channels
Its individually isolated inputs make it ideal for applications where standard shared-common modules are not sufficient.
4. Product Advantages
Individual Channel Isolation
Each input is electrically isolated, reducing interference and improving reliability.
Enhanced Noise Immunity
Performs well in electrically noisy industrial environments.
Flexible Wiring Design
Supports independent commons, simplifying complex wiring scenarios.
Improved System Protection
Isolation protects the PLC backplane and processor from voltage spikes.
Reliable Signal Detection
Ensures accurate input reading even in harsh conditions.
Seamless Integration
Fully compatible with SLC 500 systems without additional configuration complexity.
Stable Long-Term Operation
Designed for continuous industrial use with minimal maintenance.
5. Brand Information
Allen Bradley is widely known in industrial automation for providing PLC systems, I/O modules, and control solutions.
Its products are commonly used in manufacturing, energy, and process industries due to their reliability and consistent performance.
6. Product Series
- Series Name: SLC 500 (SC Enhanced Series)
- Category: Isolated Digital Input Module
The SC series modules extend the functionality of the standard SLC 500 platform by offering enhanced features such as higher isolation, improved accuracy, and advanced signal handling capabilities.
7. Recommended Models (Same Series / Related)
Related Models Table
| Model | Function | Channels | Signal Type | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 1746SC-IA8I | Digital Input | 8 | 120V AC isolated | 145 × 35 × 140 | 0.3 kg |
| 1746SC-IB8I | Digital Input | 8 | 24V DC isolated | 145 × 35 × 140 | 0.3 kg |
| 1746SC-IC8I | Digital Input | 8 | Mixed signal isolated | 145 × 35 × 140 | 0.3 kg |
| 1746SC-NI8U | Analog Input | 8 | Universal analog | 145 × 35 × 140 | 0.4 kg |
| 1746SC-INI4VI | Analog Input | 4 | Voltage/current | 145 × 35 × 140 | 0.4 kg |
8. Recommended Popular Models (Same Brand)
Popular Models Table
| Model | Series | Function | Type | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|---|
| 1756-IB16 | ControlLogix | Digital Input | 16-point DC | 140 × 112 × 145 | 0.6 kg |
| 1756-OB32 | ControlLogix | Digital Output | 32-point DC | 140 × 112 × 145 | 0.6 kg |
| 1769-IQ16 | CompactLogix | Digital Input | 16-point DC | 118 × 87 × 140 | 0.5 kg |
| 1769-OB16 | CompactLogix | Digital Output | 16-point DC | 118 × 87 × 140 | 0.5 kg |
| 1606-XLS240E | Power Supply | DIN Rail PSU | 24V DC | 123 × 50 × 125 | 0.8 kg |