VDH ALFA 13 DP User Manual

User manual
ALFA 13 DP and
ALFANET 13 DP
Min./Max. Alarm Thermostat.
VDH doc. 991879
Software: 043375_ALFA 13/23/33DP

* Function.

The ALFA(NET) 13 DP is a digital alarm thermostat for rail mounting. The thermostat watches the
minimum and maximum temperature. The temperature readout is in tenth of degrees Celsius. The
ALFA(NET) 13 DP has one relay for both alarms.
The ALFANET 13 DP has a RS 485 network connection so it can be read out and adjusted on the
Alfanet.

* Installation.

On the connection diagram of the ALFA(NET) 13 DP is shown how the sensor, power supply and
relay are connected.
After connecting the ALFA(NET) 13 DP to the power supply, a self-test function is started. As this
test is finished the measured temperature appears in the display.
The relay is normally activated, and with an alarm it is deactivated, and the led 'alarm' will light-up in
the display.

* Control.

The ALFA(NET) 13 DP alarm-thermostat can be controlled by three push buttons on the front;
SET - view / change setpoints and reset of alarm.
UP - increase a setpoint.
DOWN - decrease a setpoint.

* Viewing setpoints.

Viewing setpoint of maximum alarm:
By pushing the SET key first and then the UP key together the maximum alarm setpoint appears
in the display. The led 'set high' starts blinking.
Viewing setpoint of minimum alarm:
By pushing the SET key first and then the DOWN key together the maximum alarm setpoint
appears in the display. The led 'set low' starts blinking.
A few seconds after releasing the keys the setpoint disappears and the measured temperature is
shown in the display.
Version: v2.1
File: DO991879.WPD
1
Date: 09-11-2007
Range: -10/+40C per 0,1C