VDH ALFANET 79 PI, Руководство пользователя, Страница: 1 / 8

Description: Alfa(net) 79 PI 0/100%RH Pages: 8 Doc.no.: 170986
Type: User manual By: BVDB Version: 1.0
File: Do170986 ALFANET 79 PI 0_100%RH
Flash V10 EN.docx
Signed: Date: 16-08-2017
VDH Products BV Software: 170962
User manual
ALFA(NET) 79 PI
0/100%RH
1 Function
The ALFA(NET) 79 PI is a Panel mount hygrostat-unit. The hygrostat has three relay outputs
selectable for function humidify, dehumidify or alarm. And an PI-output 0-10Vdc for function
humidify or dehumidify. The relative humidity is being measured by a RH-sensor (Relative
Humidity) with an 0-1Vdc = 0-100%RH signal output.
The ALFANET 79 PI is provided with a RS-485 network connection, with which it can be readout or
set on the ALFANET.
2 Installation
On the connection diagram of the ALFA(NET) 79 PI is shown how the sensor, power supply, relays,
PI-output and optional network are to be connected. After connecting the ALFA(NET) 79 PI to the
power supply, a self-test function is started. As this test is finished, the measured relative humidity
appears in the display.
3 Control
The ALFA(NET) 79 PI hygrostat can be controlled by four pushbuttons on the front. These keys are;
8
SET - view / change set value and reset alarm.
∏ UP - increase set value.
π DOWN - decrease set value.
%RH STATUS - hidden relays status key.