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.