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- 1756-OX81
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- USA
- 14.5 × 5.6 × 14.0 cm
- 0.45kg
- Xiamen, China
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1756-OX81 Detailed Product Overview
Product Introduction
The 1756-OX81 is a relay output module designed for industrial automation systems requiring mixed AC/DC load switching with isolated contact architecture. It belongs to the ControlLogix modular automation platform and is commonly used in applications where high-voltage relay switching, flexible load compatibility, and electrical isolation are required.
This module provides multiple relay output points with both normally open (NO) and normally closed (NC) contact configurations. It is designed to switch a wide range of industrial loads such as motors, solenoids, lighting systems, and control circuits.
The 1756-OX81 is installed in a ControlLogix chassis and communicates with the controller via the backplane system, ensuring seamless integration into large-scale automation architectures.
Brand Information
| Item | Description |
|---|---|
| Brand | Industrial Automation Brand |
| Product Platform | ControlLogix |
| Product Type | Relay Output Module |
| Main Function | AC/DC Load Switching |
| Installation Method | Chassis Mount |
| Output Type | Isolated Relay Contact Output |
| Application Category | Industrial Automation |
| System Architecture | Modular PLC System |
Product Series Introduction
ControlLogix Series
The ControlLogix platform is a high-performance modular automation system designed for complex industrial control applications requiring scalability, flexibility, and reliability.
Core capabilities include:
- PLC logic processing
- Digital and analog I/O control
- Motion and process automation
- Industrial communication networking
- System diagnostics and monitoring
Key characteristics:
- High-speed backplane communication
- Modular architecture design
- Strong industrial reliability
- Flexible configuration options
- Long lifecycle stability
- High integration efficiency
The 1756-OX81 belongs to the isolated relay output family and is designed for applications requiring both NO/NC switching capability and reinforced electrical isolation.
It is commonly used in:
- Industrial machine control systems
- Packaging equipment
- Conveyor systems
- Process automation systems
- HVAC control systems
- Heavy-duty electrical switching applications
1756-OX81 Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 1756-OX81 |
| Product Type | Relay Output Module |
| Series | ControlLogix |
| Output Configuration | Relay (NO/NC contacts) |
| Number of Points | Multi-channel relay output (OX81 configuration class) |
| Contact Type | Form A / Form B relay contacts |
| Switching Voltage | 5–240V AC / 5–125V DC |
| Switching Current | 1 A – 2 A per point (depending on load type) |
| Contact Material | Silver alloy contacts |
| Isolation Type | Channel-to-channel isolation |
| Isolation Voltage | Up to 1500V AC (relay isolation) |
| Mechanical Life | >10 million cycles |
| Electrical Life | ~200,000–500,000 cycles (load dependent) |
| Off-State Leakage | 0 mA (mechanical relay) |
| On-State Resistance | <100 mΩ typical |
| Response Time (ON) | ~10–15 ms |
| Response Time (OFF) | ~5–10 ms |
| Backplane Current @ 5.1V DC | ~120–150 mA |
| Power Dissipation | ~3–5 W |
| Thermal Dissipation | ~10–17 BTU/hr |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity Range | 5%–95% non-condensing |
| Wiring Method | Removable terminal block |
| Status Indication | LED per channel |
| Dimensions | 14.5 × 5.6 × 14.0 cm |
| Weight kg（ ） | 0.45 kg |
Product Features
1. Mixed AC/DC Switching Capability
Supports a wide range of industrial loads, including AC motors and DC control devices.
2. Relay Isolation Structure
Each channel uses mechanical relay isolation, ensuring strong electrical separation.
3. NO/NC Contact Flexibility
Provides normally open and normally closed configurations for flexible circuit design.
4. Strong Load Compatibility
Suitable for inductive and resistive loads such as solenoids, relays, and lamps.
5. LED Status Monitoring
Each channel includes LED indicators for real-time status monitoring.
Product Advantages
High Electrical Safety
Relay-based isolation ensures safe switching of high-voltage and mixed loads.
Flexible Application Design
Supports both AC and DC switching without configuration changes.
Strong Environmental Adaptability
Performs reliably in industrial environments with electrical noise.
Simple Maintenance Structure
Mechanical relay design allows easy troubleshooting and replacement.
Multi-Channel Efficiency
Reduces cabinet space by integrating multiple switching points in one module.
Stable Industrial Operation
Suitable for long-term continuous operation in manufacturing environments.
Main Applications
Industrial Automation Systems
Used for general-purpose control of machines and production lines.
Packaging Machinery
Controls sealing, cutting, and conveyor mechanisms.
Material Handling Systems
Used in conveyor control and lifting systems.
HVAC Control Systems
Switches fans, compressors, and dampers.
Process Control Systems
Used for auxiliary switching in process automation.
Electrical Control Panels
Provides relay-based switching in industrial cabinets.
Industrial Performance Summary
| Capability | Benefit |
|---|---|
| Relay Isolation | High safety switching |
| AC/DC Compatibility | Flexible usage |
| NO/NC Contacts | Circuit design flexibility |
| LED Indicators | Easy diagnostics |
| High Durability | Long service life |
| Modular Design | System scalability |
| Industrial Grade | Stable operation |
| Multi-Load Support | Wide application range |
Recommended Related Models (Same Series / Similar Function)
| Model | Type | Channels | Output Type | Dimensions | Weight kg（ ） | Feature |
|---|---|---|---|---|---|---|
| 1756-OX81 | Relay output | Multi-channel | NO/NC relay | 14.5 × 5.6 × 14.0 cm | 0.45 kg | Base model |
| 1756-OW16I | Relay output | 16 | Dry contact | 14.5 × 5.6 × 14.0 cm | 0.45 kg | Isolated switching |
| 1756-OB16E | DC output | 16 | Electronic fused | 14.5 × 5.6 × 14.0 cm | 0.38 kg | Protection type |
| 1756-OB16 | DC output | 16 | Transistor | 14.5 × 5.6 × 14.0 cm | 0.36 kg | Standard switching |
| 1756-OB32 | High-density output | 32 | DC output | 11.1 × 3.8 × 30.0 cm | 0.26 kg | High channel density |
Recommended Popular Models (Same Platform)
| Model | Type | Function | Dimensions | Weight kg（ ） | Advantage |
|---|---|---|---|---|---|
| 1756-L81E | PLC CPU | Control processor | 14.5 × 5.6 × 14.0 cm | 0.45 kg | High performance |
| 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-OF8 | Analog output | Signal output | 11.1 × 3.8 × 30.0 cm | 2.0 kg | Multi-channel analog |
| 1756-PA75 | Power module | Power supply | 14.5 × 5.6 × 14.0 cm | 0.90 kg | System stability |
Installation Notes
- Install in ventilated control cabinet
- Ensure proper grounding
- Separate high-voltage and signal wiring
- Avoid overload beyond rated current
- Maintain proper thermal dissipation
Maintenance Notes
| Item | Recommendation |
|---|---|
| Relay inspection | Check wear condition |
| Terminal tightening | Periodic maintenance |
| Dust cleaning | Regular cleaning |
| Output testing | Verify switching operation |
| LED monitoring | Check channel status |
| Environmental control | Avoid humidity extremes |
Overall Summary
The 1756-OX81 is a robust relay output module designed for industrial automation systems requiring flexible AC/DC switching, strong electrical isolation, and reliable multi-channel control. Its NO/NC relay structure, wide load compatibility, and durable mechanical design make it suitable for a broad range of industrial applications where safety and versatility are essential.