The 1756-OF8H ControlLogix Analog Output Module from Rockwell Automation is a high-performance 8-channel HART-enabled analog output module engineered for advanced process automation systems requiring high-accuracy analog control and intelligent field device communication.
Designed for modern industrial environments, the 1756-OF8H supports both voltage and current analog outputs while integrating HART protocol communication, enabling enhanced diagnostics, remote device configuration, and real-time monitoring of smart instrumentation. It is widely deployed in industries such as oil & gas, chemical processing, pharmaceutical manufacturing, water treatment, and energy production where precision process control and field intelligence are essential.
The module combines robust analog performance with next-generation digital communication capabilities, making it ideal for Industry 4.0 process systems.
Technical Specifications (Including Size & Weight)
| Parameter | Specification |
|---|---|
| Model | 1756-OF8H |
| Series | ControlLogix HART Analog Modules |
| Module Type | 8-Channel HART Analog Output Module |
| Number of Outputs | 8 analog outputs |
| Output Signal Types | Voltage / Current selectable |
| Voltage Output Range | ±10.4V DC |
| Current Output Range | 0–20 mA / 4–20 mA |
| HART Support | Yes, one HART modem per module |
| Resolution | 15–16 bit |
| Accuracy | Voltage: ±0.1% / Current: ±0.15% typical |
| Channel Isolation | No isolation between channels |
| Isolation Voltage | 50V continuous (output-to-backplane) |
| Output Conversion Method | R-Ladder DAC |
| Settling Time | Voltage: <8.5 ms / Current: <23 ms typical |
| Open Circuit Detection | Supported for current outputs |
| Overvoltage Protection | ±24V DC |
| Backplane Current (5.1V DC) | 230 mA |
| Backplane Current (24V DC) | 230 mA |
| Total Backplane Power | 6.54 W |
| Power Dissipation | 4.92 W |
| Terminal Block | 1756-TBNH |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity | 5%–95% non-condensing |
| Weight | ~0.45–0.60 kg |
Technical performance and HART functionality specifications are based on official Rockwell Automation module documentation.
Physical Dimensions
- Size (H × W × D): 145 × 55 × 140 mm
The module maintains the standard ControlLogix chassis footprint while integrating advanced HART communication electronics for intelligent analog control.
Recommended Related Models
The 1756-OF8H is commonly deployed together with:
- 1756-IF8H HART analog input module
- 1756-IF16 analog input module
- 1756-OF8 standard analog output module
- 1756-L71 / L73 ControlLogix controllers
- 1756-EN2T EtherNet/IP communication modules
- 1756-PA75 ControlLogix power supplies
Popular Allen-Bradley HART & Analog Modules
Frequently used ControlLogix analog and HART modules include:
- 1756-OF8H HART analog output module
- 1756-IF8H HART analog input module
- 1756-OF8 standard analog output module
- 1756-OF6CI isolated current output module
- 1756-IF16 high-density analog input module
These modules provide scalable and intelligent process control solutions for modern industrial plants.
