Allen-Bradley Analog Output Module 1756-OF8I

Product Description

It features 8 individually isolated output channels, each capable of providing either 0-20 mA or 4-20 mA current outputs, or 0-10V, ±10V, 0-5V, and ±5V voltage outputs. The module offers 16-bit resolution and a fast update rate of 2 ms for all channels, ensuring accurate and responsive control in demanding processes. This module is part of Rockwell Automation's ControlLogix platform, which is known for its scalability and robustness. The 1756-OF8I supports a wide operating temperature range of 0°C to 60°C (32°F to 140°F) and has a power dissipation of 4.5 W (typical) with a maximum of 5.5 W. It is designed to be installed in a ControlLogix chassis and communicates via the backplane, requiring no external power supply beyond the chassis power. The module provides channel-to-channel and channel-to-backplane isolation of 250V AC/DC, ensuring signal integrity and protecting against ground loops. It also features open-wire detection for current outputs and supports data formats including float, integer, and engineering units. With its high accuracy of 0.05% of full-scale range and a temperature drift of ±0.005% per °C, the 1756-OF8I is ideal for applications in process control, batch processing, and discrete manufacturing where reliable analog output is critical. The Allen-Bradley 1756-OF8I is a high-density ControlLogix analog output module designed for industrial automation applications requiring precise current or voltage output signals.

Basic Product Information

• Configurable current (0-20 mA, 4-20 mA) or voltage (0-5V, ±5V, 0-10V, ±10V) outputs
• 16-bit resolution for high precision
• Channel-to-channel and channel-to-backplane isolation (250V AC/DC)
• Fast update rate: 2 ms for all channels
• Open-wire detection for current outputs
• Data formats: float, integer, engineering units
• High accuracy: 0.05% of full-scale range
• 8 isolated analog output channels

Technical Specifications

Version & Model Difference

The 1756-OF8I is part of the ControlLogix analog output module family. Compared to the non-isolated 1756-OF8 module, the 1756-OF8I provides channel-to-channel isolation, which is essential in applications where ground potential differences exist. The 1756-OF8I also supports a wider range of output signals and includes open-wire detection. There are no major hardware revisions; however, firmware updates may be available through Rockwell Automation to enhance performance and add features. The module is compatible with all ControlLogix chassis and controllers, including L6x, L7x, and L8x series.

Application Scenarios