1756-OF8I Detailed Product Overview
Product Introduction
The 1756-OF8I is an 8-channel individually isolated analog output module designed for high-performance industrial automation systems requiring flexible and accurate voltage or current signal generation. It is part of the ControlLogix modular platform and is widely used in process control, motion control, and distributed automation systems where signal isolation and precision are critical.
This module supports independent configuration per channel, allowing each output to be set as voltage or current. It is engineered for industrial environments with high electrical noise, offering improved signal integrity through per-channel isolation.
It is installed in a ControlLogix chassis and works with PLC processors and communication modules to form a complete automation control architecture.
Brand Information
| Item |
Description |
| Brand |
Industrial Automation Brand |
| Product Platform |
ControlLogix |
| Product Type |
Isolated Analog Output Module |
| Main Function |
Voltage / Current Signal Output |
| Installation Method |
Chassis Mount |
| Output Type |
Individually Isolated Analog 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 scalability, reliability, and high-speed communication.
Core capabilities include:
- PLC logic processing
- Analog and digital I/O control
- Motion and process automation
- Industrial communication networks
- System diagnostics and monitoring
Key characteristics:
- High-speed backplane communication
- Modular architecture design
- Strong industrial robustness
- Flexible configuration options
- Long lifecycle stability
- High system integration efficiency
The 1756-OF8I belongs to the isolated analog output family and is specifically designed to improve signal stability by isolating each output channel.
It is widely used in:
- Chemical process systems
- Oil and gas facilities
- Power generation plants
- Water treatment systems
- HVAC automation
- High-reliability industrial machinery
1756-OF8I Technical Specifications
| Parameter |
Specification |
| Model |
1756-OF8I |
| Product Type |
Isolated Analog Output Module |
| Series |
ControlLogix |
| Number of Outputs |
8 Channels |
| Output Types |
Voltage / Current (per channel configurable) |
| Voltage Output Range |
-10V to +10V, 0–10V, 0–5V |
| Current Output Range |
0–20 mA / 4–20 mA |
| Resolution |
16-bit high resolution |
| Accuracy |
±0.05% typical @ 25°C |
| Isolation Type |
Channel-to-channel + channel-to-backplane isolation |
| Isolation Voltage |
250V continuous |
| Open Circuit Detection |
Supported (current mode) |
| Short Circuit Protection |
Supported (voltage mode) |
| Output Load Capability |
up to 1000 Ω (current mode) |
| Settling Time |
< 2 ms to 95% of final value |
| Module Scan Time |
~1 ms minimum |
| Backplane Current @ 5.1V DC |
~200 mA |
| Backplane Current @ 24V DC |
~220 mA (typical load dependent) |
| Power Dissipation |
~5.4–10 W (load dependent) |
| Thermal Dissipation |
~18–22 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 |
| Data Format |
IEEE 32-bit floating point |
| Dimensions |
14.5 × 5.6 × 14.0 cm |
| Weight kg（ ） |
0.35 kg (approx.) |
Product Features
1. Per-Channel Isolation Design
Each output channel is electrically isolated, reducing interference and improving signal stability in noisy industrial environments.
2. Flexible Signal Configuration
Each channel can be independently configured for voltage or current output, improving system flexibility.
3. High-Precision Analog Output
16-bit resolution ensures accurate signal generation for sensitive industrial control applications.
4. Fast Response Time
Sub-2 ms settling time allows real-time process control and fast system reaction.
5. Strong Protection Mechanisms
Built-in open circuit detection, short circuit protection, and overvoltage protection improve reliability.
Product Advantages
Excellent Signal Isolation
Reduces cross-channel interference and improves system robustness.
High Configuration Flexibility
Each channel operates independently with different output modes.
Industrial-Grade Reliability
Designed for continuous operation in harsh environments.
Strong Anti-Noise Performance
Ideal for environments with high electromagnetic interference.
Easy System Expansion
Integrates seamlessly into ControlLogix modular systems.
Reduced Maintenance Risk
Built-in diagnostics simplify troubleshooting and maintenance.
Main Applications
Process Automation
Used in controlling flow, pressure, temperature, and chemical dosing systems.
Oil & Gas Systems
Provides reliable analog control signals for valves and instrumentation.
Power Plants
Used in turbine control, boiler regulation, and monitoring systems.
Water Treatment Systems
Controls pumps, valves, and chemical injection processes.
HVAC Systems
Used for precise environmental control systems.
Industrial Machinery
Provides analog signals for advanced machine automation.
Industrial Performance Summary
| Capability |
Benefit |
| 8 Isolated Channels |
High signal independence |
| Mixed Output Modes |
Flexible system design |
| High Resolution |
Precise control |
| Fast Response |
Real-time operation |
| Strong Isolation |
Reduced interference |
| Built-in Protection |
Higher safety |
| Modular Design |
Easy integration |
| Industrial Durability |
Long service life |
Recommended Related Models (Same Series / Similar Function)
| Model |
Type |
Channels |
Output Type |
Dimensions |
Weight kg（ ） |
Feature |
| 1756-OF8 |
Standard analog output |
8 |
Voltage/Current |
11.1 × 3.8 × 30.0 cm |
2.0 kg |
Non-isolated multi-channel |
| 1756-OF8H |
High-performance output |
8 |
Voltage/Current |
11.1 × 3.8 × 30.0 cm |
2.1 kg |
Faster response |
| 1756-OF6CI |
Current output module |
6 |
4–20 mA |
14.5 × 5.6 × 14.0 cm |
0.48 kg |
Stable process control |
| 1756-OF6VI |
Voltage output module |
6 |
Voltage |
14.5 × 5.6 × 14.0 cm |
0.50 kg |
Precision voltage control |
| 1756-OF4D |
Diagnostic output |
4 |
Voltage/Current |
14.5 × 2.2 × 10.5 cm |
0.47 kg |
Fault diagnostics |
Recommended Popular Models (Same Platform)
| Model |
Type |
Function |
Dimensions |
Weight kg（ ） |
Advantage |
| 1756-L81E |
PLC CPU |
Control processing |
14.5 × 5.6 × 14.0 cm |
0.45 kg |
High computing power |
| 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-OB16 |
Output module |
Digital output |
14.5 × 5.6 × 14.0 cm |
0.36 kg |
Stable switching |
| 1756-PA75 |
Power module |
Power supply |
14.5 × 5.6 × 14.0 cm |
0.90 kg |
System stability |
Installation Notes
- Install in ventilated industrial cabinet
- Ensure proper grounding
- Use shielded analog wiring
- Avoid strong electromagnetic interference
- Maintain adequate cooling space
Maintenance Notes
| Item |
Recommendation |
| Calibration |
Periodic verification |
| Terminal check |
Tight connections |
| Dust removal |
Regular cleaning |
| Output testing |
Verify signal accuracy |
| Power stability |
Clean power supply |
| Environment control |
Avoid humidity fluctuation |
Overall Summary
The 1756-OF8I is a highly flexible 8-channel isolated analog output module designed for industrial systems requiring precision, stability, and strong noise immunity. Its per-channel isolation, configurable output modes, and robust diagnostic features make it suitable for complex process control environments where reliability and signal integrity are essential.
