User manual ALFA(NET) 52 Double Thermostat.
Contents
1. User manual ALFA NET 52 Double Thermostat OuT 1 OUT 2 ALARM 2 ALFA 52 VDH doc 072383 Version v1 0 Date 18 10 2007 Software ALFA 52 File Do072383 WPD Range 50 50 C Installation On the connection diagram of the ALFA NET 52 is shown how the sensors power supply and relays has to be connected After connecting the ALFA NET 52 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 Control The ALFA NET 52 thermostat can be controlled by four pushbuttons on the front These keys are SET view change set point and reset the alarm a UP increase the set point v DOWN decrease the set point MODE relays status key 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 set points Viewing set point of thermostat 1 By pushing the SET key and then simultaneously pushing the UP key the set point of thermostat 1 appears in the display Viewing set point of thermostat 2 By pushing the SET key and then simultaneously pushing the2. cos 0 4 Relays have one common C Control By push buttons on front Front Polycarbonate Sensors 2x SM 811 2m PTC 10000 25 C Communication RS 485 Network 2xtwisted pair shielded only at ALFANET model Dimensions 90 x 71 x 58mm HWD Panel cutout 46 x 71mm HW at 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 on request available Parameters ALFA NET 52 Function relay 1 Function relay 2 Function relay 3 Offset temperature sensor 1 Offset temperature sensor 2 Switching Set point Switching Set point Switching Set point differential relay 1 offset relay 1 differential relay 2 offset relay 2 differentia relay 3 offset relay 3 Switch on delay cooling Switch off delay cooling Seconds Minutes 99 Minutes 99 Minutes Parameter 20 21 in Sec or Min Minimum on time cooling Minimum off time cooling Minimum set point Maximum set point Alarm type thermostat 1 to set point Minimum alarm set point 1 Maximum alarm set point 1 Time delay minimum alarm 1 Time delay maximum alarm 1 Alarm type thermostat 2 to set point Minimum alarm set point 2 Maximum alarm set point 2 Time delay minimum alarm 2 Time delay maximum alarm 2 Relay function alarm relay Reset alarm relay after recovering alarm Reset a
3. DOWN key the set point of thermostat 2 appears in the display A few seconds after releasing the keys the set point disappears and the measured temperature of thermostat 1 is shown again in the display Changing set points Push the SET key together with the UP or DOWN key in order to select the desired set point see above Release the SET key Now push the SET key again together with the UP or DOWN keys to change the set point 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 MODE key the display shows the status of the relays Each display segment shows the 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 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 seconds no key is pushed the ALFA NET 52 changes to the normal operation mode A
4. K LILLAN bl SB S 5 Qn lt 3 F Sw w 5 5 co t nn a dan ANS Oin tind econo z Foz OOZ ZVV wvv oz ez ow aw n on Place Terminator resistor of 250 Ohm only at both ends of the RS485 cable __ between line A and line B May be provided in the controller with a jumper For signal conditioning Place Pullup down resistors Network connections only at one point in the s ra i At to Network May be provided in 2 Conn the controller with jumpers ponnc B LO to B LO Or use ALFA 1 TERMINATOR Connect GND 0V to GND 0V S a S TJ Shield Connect Shield to clean Earth Network cable Endpoint only on one side of cable 2 twised pair shielded Network min 0 5mm Pair 1 A B Pair 2 Gnd Note 1 AVOID LONG STUB CABLES No longer than 0 5M otherwise use a Repeater Adress VDH Products BV Produktieweg 1 9301 ZS Roden The Netherlands Tel 31 0 50 30 28 900 Fax 31 0 50 30 281980 Email info vdhproducts nl Internet www vdhproducts nl
5. djustment 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 NET 52 the following error messages can appear Lo1 Minimum alarm thermostat 1 Solution E1 E2 Hi1 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 an error messages appears it can be reset by pushing the SET key The function of this key depends on parameter P42 Technical data ALFA NET 52 Type ALFA NET 52 Double thermostat Rail mounting Range 50 50 C per 0 1 C Supply 230Vac 50 60Hz 5 10 Readout 3 digit 7 segment display Relays Ry1 SPST NO 250V 8A cos 1 or 250V 5A cos 0 4 Ry2 SPST NO 250V 8A cos d 1 or 250V 5A cos o 0 4 Ry3 SPDT NO NC 250V 8A cos 1 or 250V 5A
6. larm relay after manual reset Start up delay after power failure Forced relay 1 on at sensor 1 failure Forced relay 2 3 on at sensor 2 failure Network number Software version Production year Production week Serial number x1000 Serial number units 0 1 2 None Absolute Relative 50 50 C 50 50 C 0 99 min 0 99 min 0 i 2 None Absolute Relative 50 50 C 50 50 C 0 99 min 0 ta 0 99 min Watch Control No Yes No Yes 99 Minutes No 1 Yes None Relay 2 on Relay 3 on Dimensions O00000000000 O 000000000000 90 62 46 Connections E E lt N MSN 4 gt or q 1 00 DM DN gt H a gt So G GO a aow e e i sa Pv 530 v3 v30w5 OND xo xoxo C Common OWOOOCOWDOOOO OUT 1 OUT 2 ALARM ad ALFA 52 DOWOOOOOCOOOGOO RS 485 NETWORK CONNECTIONS 2 twisted pair shielded cable One of the Controllers can be the PC Interface Repeater is also a contr p KDLC f d lt dc gt cnoxa lt gt Endpoint Network cable Connection Network 2twised pair shielded point T min 0 5mm Network Pair 1 AB Pair 2 Gnd Max Cable length 1KM zlela q pei Shield only at Shield only at Ks ia gone side of a One side of tat the cable the cable a a to Earth to Earth C er DIDOL n SKDC IKSK OCC HI KE KS JL SOC lt gt lt gt Tacah OLCI
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