Analog outputs are designed for control of external devices such as three-way valves or heat exchangers using 0-10 V⎓ analog voltage signal or 0-20 mA current signal.
**Caution!** \\
A short circuit or long-term overload of the analog output can cause permanent damage, which is manifested by a signal conversion error or a completely non-functional output.
====== Connection ======
External devices are connected to **AGND** and **AORx** or **AORy.x** terminals or to **AGND** and **AOVx** or **AOVy.x** terminals. The following image depicts connection of a device to analog output:
{{ :en:hw:008_connection_of_io.png?direct&200 |}}
====== Description of modes ======
Section 1 analog output AOR (previously only AO) can generate voltage or current: \\
It is necessary to select the output mode first and then control the output by entering values in the control software.
The expected values are:
* Voltage -> 0-10 (V⎓)
* Current -> 0-20 (mA)
Resistance measuring on section 1 AOR (previously only AO): \\
This feature is useful for collecting data from resistance sensors such as PT1000 temperature sensor.
----
Analog outputs AOV in sections 2,3 and on S5xx units support only voltage output: \\
The output voltage is regulated by entering the required value into the control SW. Expected values are 0-4000, which linearly corresponds to values of 0-10 V⎓ at the output.