1769-OF8C CompactLogix series 8-channel analog current output module

1769-OF8C is a CompactLogix series 8-channel analog current output module launched by Allen Bradley brand under Rockwell Automation, specifically designed for high-precision signal control and actuator drive in industrial automation scenarios. This module supports 8 independent single ended current outputs and can be configured as 0-20mA or 4-20mA standard industrial signals, covering the core parameter range of process control such as temperature, pressure, and flow. The core of its technology lies in a 16 bit high-resolution digital to analog converter (DAC), with a resolution of 15.59 bits and a full scale accuracy of 0.35% (25 ℃ environment), ensuring the accuracy and stability of signal output. The module adopts a 5ms full channel conversion rate and a 2.9ms step response, which can quickly respond to control instructions and is suitable for scenarios that require dynamic adjustment.

1769-OF8C is compatible with CompactLogix 1769/1768 series and MicroLogix 1500 controllers, supports distributed I/O architecture, and can achieve seamless communication with upper computer, HMI, and other devices through protocols such as EtherNet/IP. Its single width module design (4.65 × 1.38 × 3.43 inches) is compatible with DIN rail installation and supports local or extended rack deployment. The integrated wiring terminals are designed with finger safety protection for easy on-site maintenance. The module requires 24V DC external power supply, with a power consumption of only 7.5W, a working temperature range of 0-60 ℃, and a storage temperature of -20-85 ℃, suitable for harsh industrial environments.

This module has built-in channel to ground isolation, overcurrent/overvoltage protection, and open circuit detection functions. The LED status indicator light can provide real-time feedback on the module's health status. Its typical applications include: driving control valves, variable frequency drives (VFDs) and other final control components (FCEs) to achieve precise regulation of flow and pressure; Integrate into PLC system to control the start stop and speed of equipment such as conveyor belts and motors; Output signals to panel instruments and data recorders, supporting real-time monitoring of process parameters. The 1769-OF8C, with its high precision, strong anti-interference ability, and modular design, has become the core component for analog signal output in industrial automation systems, widely used in manufacturing, energy, chemical and other fields.

Technical specifications and performance

Output channels: 8 independent single ended current output channels, supporting 0-20mA or 4-20mA configurations, covering the commonly used range of industrial control.
Resolution and accuracy: Using a 16 bit DAC (digital to analog converter), the resolution reaches 15.59 bits, and the accuracy is ± 0.35% of the full range at 25 ℃, ensuring the accuracy of signal output.
Response speed: The conversion rate of all channels is 5ms, and the step response (63% output) is less than 2.9ms, meeting the requirements of fast dynamic control.
Output range: Supports 0-21mA and 3.2-21mA, compatible with multiple actuators and sensors.
Isolation and protection: Channel to ground isolation, built-in overcurrent and overvoltage protection, and open circuit detection functions to enhance system reliability.
Compatibility and Scalability

Controller compatibility: Suitable for 1769, 1768 CompactLogix, and MicroLogix 1500 controllers, supporting distributed control architecture.
Installation method: Single width module design, supporting DIN rail installation, can be integrated into local or extended I/O racks.
Communication and programming: Interact with other devices through protocols such as EtherNet/IP, support RSLogix 5000 programming environment, and be compatible with languages such as ladder diagram (LD) and structured text (ST).
Environmental adaptability

Working temperature: 0-60 ℃ (operation), -20-85 ℃ (storage), suitable for temperature fluctuations in industrial environments.
Protection level: Designed without an outer shell, it needs to be installed in a protective shell to avoid direct exposure to outdoor or harsh environments.
Physical characteristics: Size 4.65 × 1.38 × 3.43 inches, weight 0.28 kilograms, compact and lightweight, saving cabinet space.
Application scenarios

Process control: Drive control valves, frequency converters (VFDs) and other FCEs to achieve precise regulation of flow, pressure, and temperature.
Industrial automation: Integrated into PLC systems for status monitoring and logic control of production line equipment such as conveyors and motors.
Data collection: Output signals to panel instruments and data recorders, supporting real-time monitoring and recording of process parameters.
Additional features and advantages

Synchronous output: Supports 8-channel synchronous analog signal output, suitable for multivariable collaborative control.
Diagnosis and maintenance: Front LED status indicator light, capable of detecting open-loop faults; The module supports hot swapping, making it easy to maintain quickly.
Power requirement: Requires 24V DC external power supply, with a power consumption of approximately 7.5W (5V DC backplane current of 425mA).
summarize
1769-OF8C is a high-precision and highly reliable analog current output module, suitable for industrial scenarios that require precise control and real-time response. Its compatibility, scalability, and protection capabilities make it a key I/O component in CompactLogix systems, widely used in manufacturing, energy, chemical, and other fields.

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