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1 Function
The ALFA(NET) 71 PI is a panel mount thermostat-unit,
with an analog 0-10Vdc PI-output with forced heat option. The thermostat has also three relays
outputs selectable for function cooling, heating or alarm. The temperature is being measured by an
SM811 2-Wire temperature sensor.
The ALFANET 71 PI is provided with an RS-485 network connection and can be readout or set by an
PC with the ALFANET program connected thru an ALFANET PC-Interface.
2 Installation
On the connection diagram of the ALFA(NET) 71 PI is shown how the sensors, analogue output,
power supply, relays and optional network are to be connected. After connecting the ALFA(NET) 71
PI to the power supply, a self-test function is started. As this test is finished, the measured
temperature appears in the display.
3 Control
The ALFA(NET) 71 PI thermostat can be controlled by four pushbutton on the front. These keys are;
SET
- view / change set value and reset alarm.
∏ UP
- increase set value.
π DOWN
- decrease set value.
°C
- hidden relay status key.
Description:
Alfa(net) 71 PI 0/+100°C
Type:
Manual
File:
Do160111 ALFANET 71 PI 0_+100°C
Flash V10 EN.docx
VDH Products BV
Manual
0/+100°C
Pages:
By:
Signed:
Software
ALFA(NET) 71 PI
8
Doc.no:
BVDB
Doc.Version:
Date:
160064
SW.Version
160111
1.0
02-02-2016
V1.00
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Related Manuals for VDH ALFA 71 PI
Summary of Contents for VDH ALFA 71 PI
- Page 1 - decrease set value. °C - hidden relay status key. Description: Alfa(net) 71 PI 0/+100°C Pages: Doc.no: 160111 Type: Manual BVDB Doc.Version: File: Do160111 ALFANET 71 PI 0_+100°C Signed: Date: 02-02-2016 Flash V10 EN.docx VDH Products BV Software 160064 SW.Version V1.00...
- Page 2 ALFA(NET) 71 PI 0/+100°C Doc.no.: 160111 version 1.0 4 Viewing setpoint By pushing the SET key the setpoint appears in the display. The decimal point of the last display starts blinking. A few seconds after releasing the SET key the setpoint disappears and the measured temperature is shown again in the display.
- Page 3 Reset Alarm. When a error-messages appears it can be resetted by pushing the SET key. The function of this key depends on parameter P37. 11 Technical data Type ALFA 71 PI 0/+100°C or ALFANET 71 PI 0/+100°C Range 0/+100°C readout per 0,1°C...
- Page 4 ALFA(NET) 71 PI 0/+100°C Doc.no.: 160111 version 1.0 12 Setting internal parameters Next to the adjustment of the setpoint, internal settings can be made like differential, sensor offset, setpoint range and the functions of the thermostat. Push the DOWN key for more than 10 seconds, to enter the 'Internal Programming Menu'. In the left display the upper- and lower-segment are blinking.
- Page 5 ALFA(NET) 71 PI 0/+100°C Doc.no.: 160111 version 1.0 Para- Description Parameter Range Default meter value Minimum adjustable setpoint 0.0 .. +100.0°C Maximum adjustable setpoint 0.0 .. +100.0°C +100.0 Readout in whole degrees 0 = No, 1 =Yes Alarm type 0 = None 0 ..
- Page 6 ALFA(NET) 71 PI 0/+100°C Doc.no.: 160111 version 1.0 13 Function diagram Pagina 6 van 8...
- Page 7 ALFA(NET) 71 PI 0/+100°C Doc.no.: 160111 version 1.0 14 Connections Pagina 7 van 8...
- Page 8 ALFA(NET) 71 PI 0/+100°C Doc.no.: 160111 version 1.0 15 Dimensions 16 Address Tel.: +31 (0)50 – 30 28 900 VDH Products B.V. Productieweg 1 Fax.: +31 (0)50 – 30 28 980 9301 ZS Roden Email: info@vdhproducts.nl The Netherlands Internet: www.vdhproducts.nl...
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