VDH ALFANET 1-LS User manual

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User manual
ALFA 1-LS and
ALFANET 1-LS
Level switch controller
with input 0-10V =0-100%
VDH doc: 071728 Versie: v1.1 Datum: 12-12-2007
Software: 060376_ALFA 1-LS File: Do071728.wpd Range: 0/+100 % per 1%
* Function.
The ALFA(NET) 1-LS is a level-switch controller for rail mounting. The read-out is in whole percent.
The function from the controller can be changed through the internal parameters. It is possible to
switch the relay if the measured input is lower or higher than the adjusted set point.
The ALFANET 1-LS has a RS 485 network connection for read-out and adjusting through the Alfanet.
*Installation.
On the topside of the ALFA(NET) 1-LS is shown how the input, power supply and relay have to be
connected.
After connecting the ALFA(NET) 1-LS to the power supply, a self-test function is started. As this test
is finished the measured temperature appears in the display.
When the relay is activated, the led 'on' will light-up in the display.
* Control.
The ALFA(NET) 1-LS can be controlled by three push buttons on the front.
These keys are:
SET - view / change the setpoint.
UP - increase the setpoint.
DOWN - decrease the setpoint.

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* Viewing setpoint.
By pushing the SET key the setpoint appears in the display. The led 'set' starts blinking. A few seconds
after releasing the SET key the setpoint disappears and the measured temperature is shown in the
display.
* Changing setpoint.
Push the SET key and the setpoint appears in the display. Release the at SET key. Now push the SET
key again and together with the UP or DOWN keys the set point can be changed. A few seconds after
releasing the keys the measured temperature shows again in the display.
* Setting internal parameters.
Next to the adjustment of the setpoint, some internal settings are possible like differential, sensor-
offset, setpoint range and the function cooling or heating.
By pushing the DOWN key more than 10 seconds, you enter the 'internal programming menu'. In the
left display the upper and lower segment are blinking.
Over the UP and DOWN keys the required parameter can be selected (see table for the parameters).
If the required parameter is selected, the value can be read-out by pushing the SET key. Pushing the
UP or DOWN keys together with the SET key allows you to change the value of this parameter.
If after 20 seconds no key is pushed, the ALFA(NET) 1-LS changes to it's normal operation mode.
*Parameters ALFA(NET) 1-LS.
Para-
meter
Description Parameter Range Standaard
value
01
02
03
04
Switching differential
Minimum adjustable set point
Maximum adjustable set point
Offset input signal
1..15 %
0..100 %
0..100 %
-15..+15 %
3
0
100
0
10 Start up delay after powerfailure 0..99 minuten 0
15
16
17
18
19
20
Function relay
0 = input > set point relay on
1 = input < set point relay on
Switch on delay relay 1)
Switch off delay relay 1)
Parameter 16/17 in seconds or minutes
Minimum on-time relay
Minimum off-time relay
0..1
0..99
0..99
0=sec./1=min.
0..99 minuten
0..99 minuten
0
0
0
0
0
0
90
95
96
97
98
99
Network number (only at network)
Software version
Production year
Production week
Serial number (x1000)
Serial number (units)
1..250
0..255
00..99
1..52
0..255
0..999
1
-
-
-
-
-
1) If the delay is active the led ‘on’ will flash.

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* Function diagram.
*Adjusment input signal.
The input can be adjusted with the Offset (parameter 04). Indicates the ALFA(NET) 1-LS e.g. 2%
too much, the Offset has to de decreased with 2%.
*Error messages.
In the display of the ALFA 1-LS the following error messages can appear:
EE - Settings are lost.
Solution: - Reprogram the settings.
* Technical details.
Type : ALFA 1-LS (Level Switch) controller or
ALFANET 1-LS (Level Switch) controller with network
Range : 0/+100 %, read out per 1 %
Supply : 230 Vac / 1,2VA 50/60Hz (or else see product sticker)
Relay : SPDT 250V/16A(C-NO), 8A(C-NC) (cos phi=1)
Control : through push buttons on the front.
Front : Polycarbonate
Input : 0-10Vdc = 0-100%
Communication : RS485 Network (2x twisted-pair shielded min. 0,5mm2)
Dimensions : 90 x 53 x 58mm (hwd)
Panel hole : 46 x 53mm (hw)
- Provided with memory protection during power failure.
- Connection with screw terminals on top and bottom side.
- Special version on request available.
*Adress.
VDH Products BV Tel: +31 (0)50 - 30 28 900
Produktieweg 1 Fax: +31 (0)50 - 30 28 980
9301 ZS Roden Email: [e-mail]
Nederland Internet: www.vdhproducts.nl

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*Dimensions. *Connections.