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Overview
The Allen-Bradley 1756-OF8 analog output module from the ControlLogix series delivers precise and flexible analog signal control for industrial automation systems. This module supports eight configurable output channels, each capable of providing either ±10 VDC voltage or 0–20 mA current signals. Engineers rely on it for accurate signal generation, smooth control loop response, and stable process operation in demanding automation environments.
The 1756-OF8 connects seamlessly with the ControlLogix chassis, offering efficient communication through the backplane and supporting both local and distributed I/O configurations. It ensures consistent performance, easy configuration, and reliable protection features against short circuits and overvoltage conditions.
Key Features
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Provides 8 analog output channels for voltage or current applications
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Offers 15-bit resolution, ensuring smooth and accurate signal output
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Features software-configurable signal ranges for flexible deployment
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Supports open-circuit detection for current channels
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Includes overvoltage protection up to 24 VDC
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Integrates with 1756-TBNH or 1756-TBSH removable terminal blocks
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Maintains full compatibility with Allen-Bradley ControlLogix systems
Technical Specifications
| Specification | Description |
|---|---|
| Manufacturer | Allen-Bradley |
| Series | ControlLogix |
| Part Number | 1756-OF8 |
| Module Type | Analog Output Module |
| Number of Outputs | 8 Current / Voltage Channels |
| Output Current Range | 0–20 mA |
| Output Voltage Range | ±10 VDC |
| Resolution | 15 bits |
| Data Format | Integer (left-justified, 2’s complement) or IEEE 32-bit floating-point |
| Conversion Method | R-Ladder DAC, monotonic with no missing codes |
| Open Circuit Detection | Current channels only |
| Short Circuit Protection | Electronically limited to ≤21 mA |
| Overvoltage Protection | 24 VDC |
| Backplane Current (5V) | 140 mA |
| Backplane Current (24V) | 210 mA |
| Power Dissipation (Max) | 4.9 W at 60 °C |
| Isolation Voltage | 50 V continuous |
| Terminal Blocks | 1756-TBNH, 1756-TBSH |
| GTIN / UPC | 10612598171894 |
| UNSPSC | 32151705 |
Dimensions and Weight
| Parameter | Value |
|---|---|
| Weight | 1.00 lb (0.45 kg) |
| Dimensions (H × W × D) | 5.8 × 1.4 × 5.7 in (approx. 147 × 36 × 145 mm) |
Origin
Manufactured by Allen-Bradley, a brand under Rockwell Automation, the 1756-OF8 is produced in the United States, ensuring compliance with global industrial quality standards.
Applications
The 1756-OF8 is widely used in process control, motion systems, and machine automation where precise analog output control is required. It supports smooth signal conversion for actuators, drives, and instrumentation devices in manufacturing and energy sectors.
Conclusion
Engineers choose the Allen-Bradley 1756-OF8 for its precision, durability, and seamless integration with the ControlLogix platform. With high-resolution outputs and built-in protection features, it delivers exceptional control performance across a wide range of industrial applications.
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