User manual ALFANET 72 Double Thermostat
Contents
1. 250V 5A cos 0 4 Ry3 SPDT NO NC 250V 8A cos o 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 10000 25 C Communication RS 485 A B Gnd 2 wire shielded min 0 75mm2 Dimensions 35 x 77 x 71 5mm HWD Panel cutout 28 x 70mm HW 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 on request available Parameters ALFANET 72 Function relay 1 Function relay 2 Function relay 3 sensor 1l sensor 2 Offset temperatur Offset temperatur Switching differential relay 1 Setpoint offset relay 1 Switching differential relay 2 Setpoint offset relay 2 Switching differentia relay 3 Setpoint offset relay 3 Switch on delay cooling Switch off delay cooling Parameter 20 21 in Sec or Min Minimum on time cooling Minimum off time cooling Minimum setpoint Maximum setpoint Read out above 10 C per 1 C Alarm type thermostat 1 to setpoint Minimum alarm setpoint l Maximum alarm setpoint l Time delay minimum alarm 1l Time delay maximum alarm 1l 5 Alarm type thermostat 2 to setpoint inimum alarm setpoint 2 aximum alarm setpoint 2 Time delay minimum alarm 2 Time delay maximum alarm 2 Relay function alarm relay Reset alarm rela2. User manual ALFANET 72 OUT 1 m O UT 2 me ALARM oc Double Thermostat cx ALFA 72 VDH doc 070435 Version v1 0 Datum 29 01 2007 Software ALFANET 72 File Do070435 WP8 Range 50 50 0 C Installation On the top side of the ALFANET 72 is shown how the sensors power supply and relays are to be connected After connecting the ALFANET 72 to the power supply a self test function is started As this test is finished the measured temperature of thermostat 1 appears in the display Thermostat 1 works with sensor 1 and relay 1 Thermostat 2 works with sensor 2 and relay 2 Relay 3 can function as alarm relay or functions as second stage of thermostat 2 The ALFANET 72 has a RS485 network connection so it can be read out and adjusted on the ALFANET thru the ALFANET PC INTERFACE Control The ALFANET 72 thermostat can be controlled by four pushbuttons on the front These keys are SET view change the setpoint UP increase the setpoint DOWN decrease the setpoint C hidden push button above the SET key and behind C symbol Viewing the temperature of sensor 2 By pressing the UP key the measured temperature of sensor 2 is shown in the display After releasing the key the measured temperature of sensor 1 is shown again in the display Viewing setpoints Viewing setpoint of thermostat 1 By pushing the SET key and then simultaneously pushing the UP key the setpoint of thermostat 1 appears in the display Viewin
3. dress VDH Products BV Tel 31 0 50 30 28 900 Produktieweg 1 Fax 31 0 50 30 28 980 9301 ZS Roden Email info vdhproducts nl The Netherlands Internet www vdhproducts nl
4. ds no key is pushed the ALFANET 72 changes to the normal operation mode Adjustment sensors Sensor 1 can be adjusted by using the Sensor Offset parameter 05 and Sensor 2 can be adjusted by using the Sensor Offset parameter 06 Indicates a Sensor e g 2 C to much the according Sensor Offset has to be decreased with 2 C Error messages In the display of the ALFA 72 the following error messages can appear Loi Minimum alarm thermostat 1 Solution E1 E2 Hi4 Maximum alarm thermostat 1 Check if the sensor is connected correctly Lo2 Minimum alarm thermostat 2 Check sensor 10000 at 25 C Hi2 Maximum alarm thermostat 2 Replace sensor E1 Sensor 1 failure E2 Sensor 2 failure Solution EEE EEE Settings are lost 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 P42 Technical details Type ALFANET 72 Double 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 m 0 4 Ry2 SPST NO 250V 8A cos 1 of
5. g setpoint of thermostat 2 By pushing the SET key and then simultaneously pushing the DOWN key the setpoint of thermostat 2 appears in the display A few seconds after releasing the keys the setpoint disappears and the measured temperature of thermostat 1 is shown again in the display Changing setpoints Push the SET key together with the UP or DOWN key in order to select the desired setpoint see above Release the SET key Now push the SET key again together with the UP or DOWN keys to change the setpoint A few seconds after releasing the keys the measured temperature of sensor 1 is shown again in the display Status of the Relays By pushing the hidden C key the display shows the status of the relays Each display segment shows the status of the relay output showing O off and 1 0n The code 110 means relay 1 and 2 are on and relay 3 is off 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 more than 10 seconds to 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 key to change the value of this parameter If after 20 secon
6. y after recovering alarm Reset alarm relay after manual reset Start up delay after power failure z199 299 O0 Seconds 1 Minutes 0 99 Minutes 0 99 Minutes 0 99 min 0 None 1 Absolute 2 Relatief 50 0 50 0 5 0 044 5 0 4 00 99 min 99 min Watch Control Yes o Yes 99 Minutes Forced relay 1 on at sensor 1 failur Forced relay 2 3 on at sensor 2 failure Time correction at realtime clock Network number Software version Production year Production week Serial number x1000 Serial number units o 1 Yes one Relay 2 on Relay 3 on 1 dl 3 COOCOCOO CoO oONnNOoONnow OO Connections REMARK Connect a 250 Ohm Resistor between at c lt Line A and Line B at both CABLE ENDS go op of RS485 Network 2 wire with shield D Trafo 3VA oe LS Lae 230 12Vac oO vo VDH art nr S OSs 350 010073 ALFANET 72 2 Qu ODO OO L N 230Vac 12Vac N 8 1 1 2 fo o o n v S E o w e n 7 oO 7 a Qa E v v RELAY SUPPLY 2x SM811 OUTPUTS 12Vac Temp sens Dimensions 77 a zA 70 SEEM Ss A S ALFA 3x eS 0 Il 2 o f ll 69 5 i 38 Ad
Download Pdf Manuals
Related Search