User manual ALFA(NET) 71 RTDN Rail
Contents
1. set point A few seconds after releasing the keys the measured temperature shows again in the display Viewing the individual sensors By pressing the UP and DOWN key together the individual sensors can be shown in the display After releasing the keys the measured temperature of sensor 1 can be shown by pushing the UP key or the measured temperature of sensor 2 can be shown by pushing the DOWN key A few seconds after releasing the keys the average temperature shows again in the display Status of the Relays By pushing the MODE key the display shows the status of the relays Each display segment showssthe status of the relay output showing O off and 1 on The code 110 means relay 1 and 2 are on and relay 3 is off Setting internal parameters Next to the adjustment of the set point internal settings can be made like differential sensor offset set point 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 With the UP and DOWN keys the required parameter can be selected see the parameter table If the required parameter is selected the value can be read out by pushing the SET key Pushing the UP or DOWN key to change the value of this parameter If after 20 seconds no key is pushed the ALFA NET 71 RTDN changes to the normal operation mode Adjustment sensors Sensor 1 can be adjusted by2. using the Sensor Offset parameter 06 and Sensor 2 can be adjusted by using the Sensor Offset parameter 07 Indicates a Sensor e g 2 C to much the according Sensor Offset has to be decreased by 2 C Error messages In the display of the ALFA NET 71 RTDN the following error messages can appear LO Minimum alarm Solution E1 E2 HI Maximum alarm Check if the sensor is connected correctly E1 Sensor 1 failure Check sensor 1000Q at 25 C E2 Sensor 2 failure Replace sensor EEE Settings are lost Solution EEE Reprogram the settings L In case of sensor short circuit the display alternates between error code E and L as indication for a short circuit sensor H In case of open circuit sensor the display alternates between error code E and H as indication for a open circuit sensor 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 Technical data Type ALFA NET 71 RTDN rail thermostat Range 50 50 0 C above 10 C display per 0 1 C Supply 12Vac 50 60Hz 5 10 Display 3 digit 7 segment display Relays Ry1 SPST NO 250V 8A cos 1 of 250V 5A cos 0 4 Ry2 SPST NO 250V 8A cos o 1 of 250V 5A cos 0 4 Ry3 SPDT NO NC 250V 8A cos 1 of 250V 5A cos 0 4 Relays have one common C Control By push buttons on front Front Polycarbonate IP65 Sensors 2x SM 811 2m PTC
3. 10000 25 C Communication RS485 Network 2x twisted pair shielded cable min 0 75mm Dimensions 90 x 71 x 58mm HWD Panel cut out 46 x 71mm HW for front mounting Accuracy 0 5 of the range Provided with memory protection during power failure Connections with screw terminals on the back side Equipped with sensor failure detection Special versions are on request available Parameters ALFA NET 71 RTDN Description Parameter Range Standard value 1 2 3 0 0 0 0 0 0 Para Meter O01 02 03 Cool Heat Alarm ditto ditto Function Relay 1 Function Function Relay 2 Relay 3 sensor 2 0 Not 1 Control 2 Alarm sensor 1 sensor 2 Function Offset t Offset t mperatur mperatur on relay 2 by 0 Temperature 1 Time relay 3 by ditto delay relay 2 delay relay 3 differential relay 1 offset relay 1 differential relay 2 offset relay 2 differential relay 3 offset relay 3 on on on Switch on delay cooling Switch off delay cooling Parameter 20 21 in Sec Minimum on time cooling Minimum off time cooling or Min Minimum set point Maximum set point Read out above 10 C per 1 C Alarm type to set point Minimum alarm set point Maximum alarm set point Time delay minimum alarm Time delay maximum alarm Relay function alarm relay Reset alarm relay after recovering alarm Reset alarm relay after manual reset Start up delay after power
4. User manual ALFA NET 71 RTDN DIE ZE TE de Rail Thermostat with real time clock S ke GC ALFA 71 VDH doc 080341 Version v1 0 Date 07 03 2008 Software ALFANET71 RTDN File Do080341 WPD Range 50 50 0 C Installation On the connection diagram of the ALFA NET 71 RTDN is shown how the sensors power supply and relays should be connected After connecting the ALFA NET 71 RTDN to the power supply a self test function is started As this test is finished the measured temperature appears in the display Normally this is the temperature of sensor 1 unless sensor 2 is active as control sensor PO5 1 in this case the average temperature of both sensors is displayed and used for control The ALFANET 71 RTDN is by use of the ALFANET PC INTERFACE controllable on the PC Control The ALFA NET 71 RTDN thermostat can be controlled by four pushbuttons on the front These keys are SET view change the set point UP increase the set point DOWN decrease the set point MODE relay status key Viewing set point By pushing the SET key the set point appears in the display The decimal point of the last display starts blinking A few seconds after releasing the SET key the set point disappears and the measured temperature is shown again in the display Changing set point Push the SET key and the set point appears in the display Release the SET key Now push the SET key again together with the UP or DOWN keys to change the
5. failure Forced relay function at sensor failure Time hours Time minutes Time offset Day of the week offset weekday offset weekend offset abs rel 0 absolute 1 relative day position hours day position min night position hours night position min day position hours day position min night position hours night position min time time time time time time time time weekday weekday weekday weekday weekend weekend weekend weekend Network number Software version Production year Production week Serial number x1000 Serial number units E ae e E ae Pail send 99 Minutes 99 Minutes 2 SiO tC wth ZC DE uge Zb e E ee lees SFL e Seconds 1 Minutes 99 Minutes 99 Minutes cb D EDD DC 50 0 50 0 C O No 1 Yes None Absolute Relative 50 0 50 0 C 50 0 50 0 C 0 99 Minutes 0 99 Minutes O fail safe O No 1 Yes O No 1 Yes 1 Control 0 99 Minutes 0 None 1 Cool 2 Heat 0 23 hours 0 59 minutes 99 99 min year 1 7 monday sunday 50 0 50 0 C 50 0 50 0 C ARCA 23 0FF 59 0FF 23 0FF 59 0FF 23 0FF 59 0FF 23 0FF 59 0FF hours min hours min hours min hours min O OT OOO OO OOO ag 2 Dimensions Connections Ivete 218 Address VDH Products BV Produktieweg 1 9301 ZS Roden The Netherlands REMARK Connec
6. t a 750 Ohn Reststor between tmeeA ava Lone B at bolt CABLE ENLS of 8485 Necwork 2 wire with shield ALFANET 71 E 5 v oe v Q Z ke D ex lt O vw N a a rr if Loe uj u Se vo EI E sf E v SEI e e WINN co AA aw Common c Ryl no Relay 1 Ry2 no Relay 2 Ry3 no Ry3 nc S Relay 3 Tel Fax Email Internet 2 Common LS Optional b lemp e EE Temp sensor 1 SUPPLY 2x SM811 12Vac Temp sens 31 0 50 30 28 900 31 0 50 30 28 980 info vdhproducts nl www vdhproducts nl
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