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- 1756-OB8I
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- USA
- 14.5 × 5.6 × 14.0 cm
- 0.33kg
- Xiamen, China
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1756-OB8I Detailed Product Overview
Product Introduction
The 1756-OB8I is an 8-point individually isolated digital DC output module designed for industrial automation systems that require electrical isolation between channels, stable switching performance, and reliable control of DC loads. It is part of the ControlLogix modular automation platform and is commonly used in applications where signal separation and noise immunity are important.
This module provides 8 independent DC sourcing output channels. Each channel is electrically isolated, which reduces interference between outputs and improves overall system stability. It is suitable for controlling industrial devices such as relays, solenoids, indicator lights, and small actuators in demanding environments.
The module is installed in a ControlLogix chassis and works with PLC processors, communication modules, and other I/O components to build a complete industrial automation control system.
Brand Information
| Item | Description |
|---|---|
| Brand | Industrial Automation Brand |
| Product Platform | ControlLogix |
| Product Type | Isolated DC Output Module |
| Main Function | DC Load Control with Channel Isolation |
| Installation Method | Chassis Mount |
| Output Type | Transistor Sourcing Output |
| Application Category | Industrial Automation |
| System Architecture | Modular PLC System |
Product Series Introduction
ControlLogix Series
The ControlLogix platform is a modular industrial automation system designed for complex control applications requiring flexibility, scalability, and high reliability.
Core capabilities include:
- PLC logic execution
- Digital I/O control
- Motion and process automation
- Industrial communication integration
- System diagnostics and monitoring
Key characteristics:
- High-speed backplane communication
- Modular system expansion
- Strong industrial reliability
- Flexible architecture design
- Long service life
- High noise immunity
The 1756-OB8I belongs to the isolated DC output module family and is designed for applications requiring channel-level electrical separation.
It is widely used in:
- Automotive production systems
- Packaging machinery
- Material handling systems
- Conveyor control systems
- Robotics auxiliary systems
- Process control systems
- General industrial automation
1756-OB8I Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 1756-OB8I |
| Product Type | Individually Isolated DC Output Module |
| Series | ControlLogix |
| Number of Outputs | 8 Channels |
| Output Voltage Range | 10–30 V DC |
| Output Type | Transistor Sourcing Output |
| Isolation Type | Per-channel electrical isolation |
| Isolation Voltage | 250 V continuous between channels |
| Output Current per Point | 2 A per channel |
| Output Current per Module | 8 A total |
| Surge Current per Point | 4 A (short pulse) |
| Off-State Leakage Current | ≤ 1 mA |
| On-State Voltage Drop | ~1.2 V DC |
| Response Time | ~1 ms switching delay |
| Backplane Current @ 5.1V DC | ~180–220 mA |
| Power Dissipation | ~2.6–3.2 W |
| Thermal Dissipation | ~9 BTU/hr |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity Range | 5%–95% non-condensing |
| Vibration Resistance | Industrial grade |
| Shock Resistance | Industrial grade |
| Wiring Method | Removable terminal block |
| Cooling Method | Passive cooling |
| Dimensions | 14.5 × 5.6 × 14.0 cm |
| Weight kg（ ） | 0.33 kg |
Product Features
1. Individual Channel Isolation
Each of the 8 output channels is independently isolated, reducing electrical interference and preventing fault propagation.
2. Stable DC Output Performance
Provides consistent DC switching for industrial devices such as relays, solenoids, and indicators.
3. High Noise Immunity
Isolation improves resistance to electromagnetic interference in industrial environments.
4. Strong Load Driving Capability
Each channel supports up to 2A output, suitable for a wide range of industrial devices.
5. Compact Modular Design
Optimized size allows efficient use of control cabinet space.
Product Advantages
High Electrical Safety
Channel isolation reduces risk of cross-channel electrical faults.
Reliable Industrial Operation
Stable performance under continuous industrial use.
Flexible System Design
Suitable for modular expansion in ControlLogix systems.
Strong Load Capability
Supports relatively high current per channel.
Reduced Interference Risk
Isolation improves signal integrity.
Easy Installation
Standard modular design simplifies wiring and setup.
Main Applications
Machine Automation
Used in small and medium industrial machines requiring isolated outputs.
Packaging Systems
Controls conveyors, actuators, and auxiliary devices.
Material Handling Systems
Used in conveyor control and logistics systems.
Robotics Systems
Provides isolated output signals for robotic auxiliary functions.
Process Automation
Used in systems requiring stable and isolated DC control.
General Manufacturing
Applicable in industrial equipment and production lines.
Industrial Performance Summary
| Capability | Benefit |
|---|---|
| 8 Isolated Outputs | High signal independence |
| 2A Per Channel | Strong load capacity |
| Electrical Isolation | Improved safety |
| Fast Switching | Reliable operation |
| Modular Design | Easy expansion |
| Noise Resistance | Stable performance |
| Compact Size | Space saving |
| Industrial Durability | Long lifespan |
Recommended Related Models (Same Series / Similar Function)
| Model | Type | Channels | Output Type | Dimensions | Weight kg（ ） | Feature |
|---|---|---|---|---|---|---|
| 1756-OB8 | DC Output Module | 8 | DC | 14.5 × 5.6 × 14.0 cm | 0.36 kg | Standard 8-channel output |
| 1756-OB16I | 16-channel isolated output | 16 | DC | 14.5 × 5.6 × 14.0 cm | 0.34 kg | Higher density isolation |
| 1756-OB16IS | Fully isolated output | 16 | DC | 14.5 × 5.6 × 14.0 cm | 0.20 kg | Strong channel separation |
| 1756-OB16D | Diagnostic output | 16 | DC | 14.5 × 5.6 × 14.0 cm | 0.40 kg | Fault detection |
| 1756-OB16E | Electronic fused output | 16 | DC | 14.5 × 5.6 × 14.0 cm | 0.38 kg | Built-in protection |
Recommended Popular Models (Same Platform)
| Model | Type | Function | Dimensions | Weight kg（ ） | Advantage |
|---|---|---|---|---|---|
| 1756-L81E | PLC CPU | High-speed control | 14.5 × 5.6 × 14.0 cm | 0.45 kg | High processing power |
| 1756-EN2TR | Ethernet module | Communication | 14.5 × 5.6 × 14.0 cm | 0.29 kg | Stable network |
| 1756-IB16 | Input module | Digital input | 14.5 × 5.6 × 14.0 cm | 0.27 kg | Reliable sensing |
| 1756-IF16 | Analog module | Signal processing | 14.5 × 5.6 × 14.0 cm | 0.31 kg | High precision |
| 1756-PA75 | Power module | Power supply | 14.5 × 5.6 × 14.0 cm | 0.90 kg | Stable system power |
Installation Notes
- Install in ventilated cabinet
- Ensure proper grounding
- Use shielded industrial wiring
- Avoid moisture and dust
- Maintain heat dissipation space
Maintenance Notes
| Item | Recommendation |
|---|---|
| Terminal check | Regular tightening |
| Dust cleaning | Periodic maintenance |
| Temperature control | Ensure ventilation |
| Output testing | Verify operation |
| Power stability | Maintain clean supply |
| Vibration control | Reduce mechanical stress |
Overall Summary
The 1756-OB8I is an 8-channel individually isolated DC output module designed for industrial automation systems requiring high electrical isolation, stable switching, and strong noise immunity. Its per-channel isolation structure makes it suitable for environments where signal integrity and fault containment are critical, while its compact design supports efficient system integration in modern automation setups.