Analog outputs
Analog outputs on Unipi Extension modules are designed for control of external devices such as three-way valves or heat exchangers using 0-10 V⎓ analog voltage signal.
Connection
External devices are connected to AGND and AOx terminals. The following image depicts the connection of a device to analog output:
Special functions
Aside from the standard inputs and outputs, Unipi Extension modules also feature additional functions for broadening the possible applications, performance optimization and monitoring of the entire project. These functions are calculated directly by the Extension's microprocessor and are thus independent on the control software.
Default configuration
This function is used to save the current configuration of the section (extension module) into its memory. In the of power cycle of the device or reboot of the section (extension module), the stored configuration is loaded and applied. This functionality is also known as “copy
running-config to startup-config”.
| Stored data | Default configuration |
|---|---|
| Output value | 0 V⎓ |
Master Watchdog
This function runs on the section's (extension module's) microprocessor and continuously monitor the commands from the application running on the unit. If no commands are detected within a configured time (MWD Timeout), the module's processor automatically reboots and reverts to the default configuration described above. This function ensures a safe configuration is set in case of emergency situations (unit failure, communication error or software issues) to prevent damage to controlled devices or any hazards to personnel.
Technical parameters
| Output terminals | AOV |
| Common conductor | AGND |
| Galvanic isolation | Yes |
| Output functions | 0–10 V⎓ voltage source |
| Resolution | 12 bits |
| Conversion time | 300 μs |
| Protection type | Integrated overvoltage protection |
| Output voltage range | 0-10 V⎓ |
| Output accuracy | ±0.5 % |
