The 1756-OF4 ControlLogix Analog Output Module from Rockwell Automation is a precision 4-channel analog output module designed for industrial automation systems that require accurate voltage or current signal control in process and motion-related applications.
It is widely used to drive control valves, proportional actuators, VFD speed references, and instrumentation devices in industries such as oil & gas, water treatment, power generation, and advanced manufacturing. With high-resolution output and flexible signal types, the 1756-OF4 delivers stable and repeatable analog control performance within ControlLogix systems.
This module is a strong choice for applications where signal accuracy matters more than channel density, offering precise control in compact form.
Technical Specifications (Including Size & Weight)
| Parameter | Specification |
|---|---|
| Model | 1756-OF4 |
| Series | ControlLogix Analog Output Modules |
| Module Type | 4-Point Analog Output Module |
| Number of Outputs | 4 channels |
| Output Types | Voltage / Current selectable |
| Output Voltage Range | ±10V DC |
| Output Current Range | 0–20 mA / 4–20 mA |
| Resolution | 15-bit high precision |
| Accuracy | ±0.05% full scale (typical) |
| Update Time | ~2 ms per channel |
| Isolation Voltage | 250V continuous (backplane isolation) |
| Channel Isolation | Non-isolated between channels |
| Backplane Current (5V DC) | ~150 mA |
| Backplane Current (24V DC) | ~120 mA |
| Power Dissipation | ~3–5 W |
| Field Wiring | External analog devices (loop powered or externally powered) |
| Terminal Block | 1756-TBSH / 1756-TBNH |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity | 5%–95% non-condensing |
| Weight | ~0.30–0.40 kg |
Physical Dimensions
- Size (H × W × D): 145 × 55 × 140 mm
The wider form factor compared to digital modules reflects its analog circuitry layout while still maintaining a single-slot ControlLogix chassis design.
Recommended Related Models
The 1756-OF4 is commonly used with:
- 1756-IF8 analog input module
- 1756-OB16 DC output module
- 1756-OA16 AC output module
- 1756-OF8 / OF8I analog output variants
- 1756-L71 / L73 ControlLogix processors
- 1756-EN2T EtherNet/IP communication modules
Popular Allen-Bradley ControlLogix Analog Modules
Within the ControlLogix analog family, commonly used modules include:
- 1756-OF4 4-channel analog output module
- 1756-OF8 higher-density analog output module
- 1756-IF8 analog input module
- 1756-IF16 high-density analog input module
- 1756-OF4I isolated analog output variants
These modules support precise process control and signal conditioning across industrial systems.
