Smart DC Signal Acquisition for High-Performance SLC 500 Systems
The Allen Bradley 1746-IB16 Digital Input Module is a dependable 16-channel DC input solution designed for the SLC 500 automation platform. Built to monitor field devices with precision and consistency, this module enables fast and reliable signal detection from industrial sensors, switches, and control components operating on 24V DC systems.
Its compact design, robust electrical performance, and seamless integration with SLC 500 processors make it a practical choice for manufacturing facilities, process control systems, and machine automation projects where stable digital input monitoring is essential. The module is engineered to help improve control accuracy while supporting long-term operational reliability in demanding industrial environments.
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Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Allen Bradley |
| Model Number | 1746-IB16 |
| Module Type | Digital Input Module |
| Product Family | SLC 500 |
| Input Channels | 16 Digital Inputs |
| Input Configuration | Sinking Input |
| Nominal Input Voltage | 24 V DC |
| Operating Voltage Range | 10–30 V DC |
| Input Current | 8 mA at 24 V DC |
| Input Groups | 1 Group, Common Terminal |
| Signal Delay (ON) | 8 ms |
| Signal Delay (OFF) | 8 ms |
| Off-State Voltage | 5 V DC Maximum |
| Off-State Current | 1 mA Maximum |
| Backplane Current Draw | 50–85 mA at 5 V DC |
| Isolation | Optical Isolation |
| Installation | SLC 500 Chassis Mount |
| Operating Temperature | 0°C to +60°C |
Industrial Applications
The 1746-IB16 module is widely used in industrial control environments where dependable DC input monitoring is required.
Common applications include:
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Automated production machinery
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Packaging and labeling equipment
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Material handling systems
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Conveyor control networks
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Assembly line automation
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Food and beverage processing systems
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Water treatment facilities
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Energy management systems
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Industrial process monitoring
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OEM machine control panels
Its ability to interface with sourcing field devices makes it highly adaptable for modern industrial sensor installations.
Key Advantages
High-Density 16-Point Design
Provides sixteen input channels within a single module, helping reduce cabinet space and simplify system architecture.
Stable 24V DC Signal Processing
Optimized for industrial 24V DC control circuits, delivering dependable signal recognition across demanding environments.
Fast Response Performance
With 8 ms ON and OFF response times, the module supports efficient machine control and process monitoring.
Strong Electrical Isolation
Optical isolation helps improve noise immunity and protects controller backplane circuitry.
Easy SLC 500 Integration
Installs directly into standard SLC 500 chassis systems without complex configuration requirements.
Simplified Diagnostics
Front-panel status indicators allow technicians to quickly verify field input conditions during operation and maintenance.
Long-Term Industrial Reliability
Designed for continuous-duty automation environments where consistent performance and system uptime are critical.
Technical FAQs
1. What is the primary function of the 1746-IB16 module?
It receives and processes DC digital input signals from field devices connected to an SLC 500 PLC system.
2. How many input channels are available?
The module provides 16 digital input points.
3. What voltage range does it support?
It operates within a 10–30 V DC input range.
4. What type of wiring configuration is required?
The module is designed for sinking input applications.
5. Is the module compatible with all SLC 500 chassis systems?
Yes, it can be installed in available slots within standard SLC 500 chassis configurations.
6. What devices are commonly connected to this module?
Proximity sensors, pushbuttons, limit switches, relay contacts, and similar DC field devices.
7. Does the module include channel status indicators?
Yes, each input channel includes LED diagnostics for status monitoring.
8. What is the signal response time?
Typical ON and OFF signal delays are 8 milliseconds.
9. Does it provide electrical isolation?
Yes, optical isolation helps improve system stability and noise resistance.
10. What is the main advantage of the 1746-IB16?
It delivers reliable high-density DC input monitoring while maintaining seamless compatibility with SLC 500 automation systems.
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