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- Allen-Bradley
- 1762-IQ8
- MicroLogix DC Input Module
- USA
- 90 x 40 x 87 mm
- 0.2 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Allen-Bradley 1762-IQ8 MicroLogix DC Input Module is a compact 8-point digital input module designed for MicroLogix PLC systems used in industrial automation applications.
It is used to receive 24V DC discrete signals from field devices such as sensors, switches, and relays, and convert them into digital input signals for PLC processing. This module is widely applied in small to medium-sized control systems where space efficiency and reliable signal acquisition are important.
With its compact structure, stable electrical isolation, and flexible sinking/sourcing input design, the 1762-IQ8 is a dependable solution for industrial digital signal monitoring.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Allen-Bradley (Rockwell Automation) |
| Model | 1762-IQ8 |
| Product Type | MicroLogix DC Input Module |
| Input Type | 24V DC sinking/source inputs |
| Number of Inputs | 8 points |
| Input Voltage Range | 10–30V DC |
| Input Current (ON state) | approx. 2–12 mA |
| Signal Delay | approx. 8 ms |
| Input Grouping | single group |
| Electrical Isolation | input-to-backplane isolation |
| Mounting Type | MicroLogix expansion / DIN rail |
| Wiring Method | screw terminal connection |
| Dimensions | 90 × 40 × 87 mm |
| Weight | 0.2 kg |
| Application | PLC digital input signal acquisition |
| Operating Environment | Industrial automation systems |
Function and Working Principle
The 1762-IQ8 works as a digital signal interface between field devices and PLC controllers.
Its operating process includes:
- Receiving ON/OFF 24V DC signals from field devices
- Converting electrical signals into PLC-readable digital states
- Sending input data to the MicroLogix backplane system
- Providing electrical isolation between field wiring and control logic
- Filtering electrical noise to ensure stable signal detection
Each input channel operates independently for real-time monitoring of multiple field devices.
Role in Industrial Control Systems
Within automation systems, the 1762-IQ8 serves as a front-end digital input acquisition module.
It is commonly used to connect:
- Proximity sensors
- Limit switches
- Push buttons
- Relay contacts
- Machine status signals
- Safety interlock devices
It enables accurate monitoring of machine and process conditions in real time.
Industrial Applications
The Allen-Bradley 1762-IQ8 is widely used in:
- Industrial automation systems
- Machine control systems
- Packaging equipment
- Conveyor systems
- Material handling systems
- Small PLC control panels
- Process monitoring applications
It is especially suitable for compact systems requiring reliable low-channel digital input expansion.
Installation and System Integration
Proper installation ensures stable performance:
- Mounted on MicroLogix PLC backplane or DIN rail
- Connected via screw terminal wiring
- Powered through PLC system backplane
- Installed inside industrial control cabinets
- Requires proper grounding and shielding
Correct wiring improves signal stability and reduces electrical noise interference.
Compatible System Components
The 1762-IQ8 typically works with:
- MicroLogix 1100 / 1200 / 1400 PLC controllers
- 1762 expansion I/O modules
- Digital output modules
- Industrial sensors and switches
- Relay interface modules
- PLC communication modules
It functions as a key input module in MicroLogix PLC architectures.
Recommended Alternative Models
| Model | Type | Key Feature | Application |
|---|---|---|---|
| 1762-IQ16 | 16-point input module | Higher channel density | Expanded PLC systems |
| 1762-OW8 | Digital output module | Output control | Actuator systems |
| 1769-IQ8 | CompactLogix input module | Advanced platform | Modern PLC systems |
| 1794-IB8 | Flex I/O input module | Distributed architecture | Modular automation |
| Siemens DI modules | PLC input modules | Alternative ecosystem | Industrial control systems |
Key Advantages
- Compact 8-channel digital input design
- Fast signal response (~8 ms delay)
- Strong electrical isolation for safety
- Flexible sinking/sourcing compatibility
- Industrial-grade reliability
- Easy integration with MicroLogix PLC systems
Technical FAQs
What is the main function of the 1762-IQ8?
It collects 24V DC digital signals from field devices and sends them to a PLC system.
How many inputs does it have?
It provides 8 discrete digital input channels.
What type of signals does it support?
It supports sinking and sourcing 24V DC inputs.
Where is it used?
Inside PLC control cabinets for industrial automation systems.
Conclusion
The Allen-Bradley 1762-IQ8 MicroLogix DC Input Module is a reliable and compact industrial digital input solution designed for efficient signal acquisition in PLC-based automation systems. With 8 input channels, fast response time, and strong electrical isolation, it ensures stable monitoring and control of field devices in industrial environments.
For engineers and system integrators, it provides a practical and cost-effective solution for compact PLC input expansion and dependable industrial operation.