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SKU:1746-IB8
Allen-Bradley 1746-IB8 SLC 500 Digital Input Module 8 Channel 24V
Manufacturer: Allen-Bradley
Product No.: 1746-IB8
Product Type: Digital Input Module
Product Origin: USA
Payment:T/T, Western Union
Weight: 300g
Shipping port: Xiamen
Warranty: 12 months
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Allen-Bradley 1746-IB8 SLC 500 Digital DC Input Module
The Allen-Bradley 1746-IB8 is an SLC 500 digital DC input module featuring 8 sinking input channels rated at 24 V DC. Operating from 10-30 V DC, this module provides reliable field signal acquisition for industrial control systems. Approved for Class 1 Division 2 hazardous locations, it draws 50 mA backplane current at 5 V DC and dissipates 1.3 W. Weighing approximately 0.3 kg (0.66 lbs), it operates from 0°C to 60°C.
Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Rockwell Automation |
| Brand | Allen-Bradley |
| Part Number | 1746-IB8 |
| Series | SLC 500 |
| Module Type | Digital DC Input Module |
| Inputs | 8 (Sinking) |
| Voltage Range | 10-30 V DC |
| Nominal Voltage | 24 V DC |
| Nominal Input Current | 8 mA @ 24 V DC |
| Off-State Current | 1 mA max |
| Off-State Voltage | 5.0 V DC max |
| Signal Delay (ON/OFF) | 8 ms |
| Backplane Current | 50 mA @ 5 V DC |
| Power Dissipation | 1.3 W (4.4 BTU/hr) |
| Dielectric Withstand | 1500 V AC |
| Operating Temperature | 0°C to 60°C (32°F to 140°F) |
| Humidity | 5-95% non-condensing |
| Vibration | 2.5G @ 57-500 Hz |
| Shock | 30G |
| Approvals | UL, CE, Class 1 Div 2 |
| UPC | 10662073521256 |
Model Number Breakdown
- 1746 – SLC 500 I/O Series
- I – Input Module
- B – DC Voltage, Sinking Input
- 8 – 8 Input Channels
Installation & Field Application Guide
- Install in any available slot of the SLC 500 chassis. Ensure the power supply supports the 50 mA backplane draw.
- Wire field devices to the 8 input terminals using appropriate gauge wire. Inputs are sinking type.
- Verify field voltage is between 10-30 V DC. Nominal input current is 8 mA at 24 V DC.
- For Class 1 Division 2 installations, follow hazardous area wiring practices and use approved barriers.
Why Choose the 1746-IB8
- 8 sinking inputs provide reliable DC signal acquisition for SLC 500 systems.
- Class 1 Division 2 approval for hazardous area installations.
- Low backplane current (50 mA) minimizes power supply loading.
- Proven reliability with UL, CE, and NEMA Noise Immunity certification.
Field Engineer FAQs
Q1: What is the difference between sinking and sourcing inputs on the 1746-IB8?
A1: The 1746-IB8 provides sinking inputs, meaning the input connects to the common (ground) to turn on. The input circuit sources current to the field device.
Q2: Can the 1746-IB8 be used with 24 V AC signals?
A2: No, this module is designed for DC input signals only. Use the 1746-IA8 for AC input applications.
Q3: What is the maximum cable length for field wiring to the 1746-IB8?
A3: Maximum recommended cable length is 305 meters (1000 feet) for reliable signal detection.
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