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- 1756-OB8
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- USA
- 14.5 × 5.6 × 14.0 cm
- 0.36kg
- Xiamen, China
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1756-OB8 Detailed Product Overview
Product Introduction
The 1756-OB8 is an 8-point digital DC output module designed for industrial automation systems requiring reliable switching performance, compact design, and stable control of DC loads. It is part of the ControlLogix modular automation platform and is commonly used in medium-scale control applications where fewer output points are required but high reliability is still essential.
This module provides 8 DC sourcing output channels capable of driving industrial devices such as relays, solenoids, indicator lamps, and small actuators. It is designed for 12/24V DC industrial control systems and supports stable switching performance with industrial-grade durability.
The module is installed in a ControlLogix chassis and integrates with PLC processors, communication modules, and other I/O components to form a complete automation control system.
Brand Information
| Item | Description |
|---|---|
| Brand | Industrial Automation Brand |
| Product Platform | ControlLogix |
| Product Type | Digital DC Output Module |
| Main Function | DC Load Switching Control |
| 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 automation system designed for complex industrial control applications requiring scalability, reliability, and high-speed communication.
Key capabilities include:
- PLC logic processing
- Digital I/O control
- Motion and process automation
- Industrial network communication
- System diagnostics and monitoring
Key characteristics:
- High-speed backplane communication
- Modular system expansion
- Strong industrial reliability
- Flexible architecture design
- Long lifecycle operation
- Easy system integration
The 1756-OB8 belongs to the compact DC output module family and is designed for applications requiring fewer output channels but stable and reliable performance.
It is widely used in:
- Machine automation systems
- Packaging equipment
- Material handling systems
- Conveyor systems
- Small-scale production lines
- Robotics auxiliary control
- General industrial automation
1756-OB8 Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 1756-OB8 |
| Product Type | Digital DC Output Module |
| Series | ControlLogix |
| Number of Outputs | 8 Channels |
| Output Voltage Range | 10–30 V DC |
| Output Type | Transistor Sourcing Output |
| Output Current per Point | 2 A per channel @ 60°C |
| Output Current per Module | 8 A total |
| Surge Current per Point | 4 A (10 ms pulse) |
| Isolation Voltage | 250 V continuous (group isolation) |
| Off-State Leakage Current | ≤ 1 mA per point |
| On-State Voltage Drop | ~1.2 V DC @ rated load |
| Response Time | ~1 ms switching delay |
| Backplane Current @ 5.1V DC | ~165–200 mA |
| Power Dissipation | ~2.5 W @ 60°C |
| Thermal Dissipation | ~8.5 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（ ） | 0.36 kg |
Product Features
1. Compact 8-Channel Output Design
The module provides 8 reliable output channels in a compact form factor, suitable for small and medium automation systems.
2. Stable DC Switching Performance
Supports consistent switching of DC loads such as relays, solenoids, and indicator devices.
3. High Output Current Capability
Each channel supports up to 2A output, allowing control of a wide range of industrial devices.
4. Industrial-Grade Durability
Designed for continuous operation in harsh environments with vibration and electrical noise.
5. Modular Integration
Fully compatible with ControlLogix systems for flexible expansion and system design.
Product Advantages
Reliable Industrial Operation
Stable performance under continuous industrial use conditions.
Compact System Design
Reduces cabinet space requirements compared to higher-channel modules.
Strong Load Driving Capability
Supports relatively high current per channel (2A).
Simple System Integration
Easily integrates into existing ControlLogix architectures.
Low Power Consumption
Efficient energy usage reduces system heat generation.
Cost-Effective Solution
Ideal for systems that do not require high channel density.
Main Applications
Machine Automation
Used in small machine control systems and production equipment.
Packaging Systems
Controls conveyors, actuators, and simple automation devices.
Material Handling
Used in small conveyor and logistics control systems.
Robotics Support Systems
Provides auxiliary output control in robotic systems.
Industrial Equipment Control
Used in pumps, valves, and relay control systems.
General Manufacturing
Applicable in low-to-medium complexity automation systems.
Industrial Performance Summary
| Capability | Benefit |
|---|---|
| 8 Output Channels | Compact system design |
| 2A Per Channel | Strong load capability |
| Fast Switching | Reliable control |
| Stable DC Output | Industrial reliability |
| Modular Architecture | Easy expansion |
| Low Power Consumption | Efficient operation |
| Durable Construction | Long service life |
| Simple Wiring | Easy installation |
Recommended Related Models (Same Series / Similar Function)
| Model | Type | Channels | Output Type | Dimensions | Weight kg（ ） | Feature |
|---|---|---|---|---|---|---|
| 1756-OB16 | DC Output Module | 16 | DC | 14.5 × 5.6 × 14.0 cm | 0.36 kg | Standard output |
| 1756-OB32 | High-density output | 32 | DC | 11.1 × 3.8 × 30.0 cm | 0.26 kg | High channel count |
| 1756-OB16I | Isolated output | 16 | DC | 14.5 × 5.6 × 14.0 cm | 0.34 kg | Channel isolation |
| 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 | Strong processing |
| 1756-EN2TR | Ethernet module | Communication | 14.5 × 5.6 × 14.0 cm | 0.29 kg | Stable networking |
| 1756-IB16 | Input module | Signal 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 accuracy |
| 1756-PA75 | Power module | Power supply | 14.5 × 5.6 × 14.0 cm | 0.90 kg | Stable energy supply |
Installation Notes
- Install in ventilated control cabinet
- Ensure proper grounding
- Use shielded industrial wiring
- Avoid moisture and dust
- Maintain airflow for cooling
Maintenance Notes
| Item | Recommendation |
|---|---|
| Terminal inspection | Regular tightening |
| Dust cleaning | Periodic maintenance |
| Temperature control | Ensure ventilation |
| Output testing | Verify switching |
| Power stability | Maintain clean supply |
| Vibration control | Reduce mechanical stress |
Overall Summary
The 1756-OB8 is a compact 8-channel DC output module designed for industrial automation systems requiring stable switching performance in a small footprint. With 2A per-channel capability, strong reliability, and simple integration into ControlLogix systems, it is well suited for small to medium automation applications where efficiency and space-saving design are important.