User Manual ALFA(NET) 33 -50/+150 C Min./Max
Contents
1. alarm set point appe ars in the display The led set low starts blinking A few seconds after releasing the keys the set point disappears and the measured temperature is shown in the display Changing setpoints Push the SET key together with the UP or DOWN key and the maximum alarm setpoint or minimum alarm setpoint appears in the display Release both keys Now push the SET key again and together with the UP or DOWN keys the setpoint can be changed A few seconds after releasing the keys the measured temperature shows again in the display Actions of the alarm functions The ALFA NET 33 alarm thermostat has a minimum alarm and a maximum alarm both with there own setpoint We can choose two different kinds of alarms PARAMETER 27 namely watchdog alarm relay normally activated with alarm it falls off and the led alarm burns So on power failure the alarm relay also falls off or a regulated alarm relay normally not activated with alarm the relay will be activated and the led alarm will burn With PARAMETER 28 we can choose auio reset alarm or a hold alarm after temperature recovering Also it is possible to give both set points their own offset and differential see function diagram Each alarm can be set at an alarm delay time PARAMETER 23 and 24 when the temperature will give an alarm the led alarm first starts to blink If the temperature will recover within the delay time no alarm occurs If an alarm2. the controller with a jumper For signal conditioning Place Pullup down resistors only at one point in the Network May be provided in the controller with jumpers Or use ALFA 1 TERMINATOR AKC D lt KDCOxIKS lt KDC gt CHIxIKD y Network cable 2 twised pair shielded min 0 5mm Li RELAY OUTPUT SPDT Pair 1 A B Pair 2 Gnd Note 1 AVOID LONG STUB CABLES No longer than 0 5M otherwise use a Repeater Tel Fax Email Internet REMARK To terminate RS485 Network Connect a 250 Ohm resistor between ne A and Line B at both cable ends only at one side Shield to earth of the cable Optional RS485 SM811 NETWORK Temp 2 twisted pair sensor shielded Network connections Pair 1 Connect A HI to A HI Connect B LO to B LO Pair 2 Connect GND 0V to GND 0V Shield ield Connect Shield to clean Earth Endpoint only on one side of cable Network 31 0 50 30 28 900 31 0 50 30 28 980 info vdhproducts nl www vdhproducts nl
3. will come through after the delay time the led alarm burns continuously and the display alternates between the temperature and H for high alarm max or L for low alarm min to indicate the alarm To reset an alarm press the SET key Sensor adjustment The sensor can be adjusted by using the Sensor Offset parameter 04 Indicates the ALFA NET 33 e g 2 C too much the Sensor Offset has to de decreased by 2 C Error messages In the display of the ALFA NET 33 the following error messages can appear E1 Sensor broken Solution Check if the sensor is connected correctly Check the sensor 1000Q at 25 C Replace the sensor EE Settings are lost Solution Re programme the settings L In case of sensor short circuit the display alternates between error code E1 and L as indication for a short circuit sensor H In case of open circuit sensor the display alternates between error code E1 and H as indication for a open circuit sensor Technical data Type ALFA NET 33 alarm thermostat Range 50 150 C readout per 1 C Supply 230 Vac 50 60Hz 3VA or else see product sticker Relay SPDT 250V 16A C NO 8A C NC cos phi 1 Communication RS 485 Network 2xtwisted pair shielded only at ALFANET model Control thru pushbuttons on front Front Polycarbonate IP65 Sensor SM 811 2 wire PTC 1KOhm at 25 C Dimensions 35 x 77 x 71 5mm hwd Panel cut out 28 x 70mm hw Provi
4. User Manual ALFA NET 33 50 150 C Min Max Alarm thermostat setlow sethigh alarm Aa Cy ALFA 33 VDH doc 100794 Version v1 0 Date 27 09 2010 Software 072760 ALFA NET 13 23 33 File Do100794 wpd Range 50 150 C readout per 1 C Function The ALFA NET 33 is a digital alarm thermostat for panel mounting The thermostat watches the minimum and maximum temperature The ALFA NET 33 has one relay for both alarms The ALFANET 33 has a RS 485 network connection so it can be read out and adjusted on the Alfanet Installation On the topside of the ALFA NET 33 you can see how the sensor power supply and relay have to be connected After connecting the ALFA NET 33 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 with an alarm it s not activated then the led on will light up in the display Control The ALFA NET 33 alarm thermostat can be controlled by three pushbuttons on the front SET view change set points and reset of alarm Aa UP increase a value CY DOWN decrease a value Viewing set points Viewing set point of maximum alarm By pushing the SET key first and then the UP key together the maximum alarm set point appears in the display The led set high starts blinking Viewing set point of minimum alarm By pushing the SET key first and then the DOWN key together the maximum
5. ded with memory protection during power failure Connection with screw terminals on the backside Equipped with self test function and sensor failure detection Special version are available upon request Setting internal parameters Next to the adjustment of the set point some internal settings are possible like differential sensor offset set point range 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 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 keys allows you to change the value of this parameter If no key is pushed for 20 seconds the ALFA NET 33 changes to it s normal operation mode Parameters ALFA NET 33 PARA DESCRIPTION PARAMETER RANGE DEFAULT METER VALUE Minimum set point 50 150 C Maximum set point 50 4 150 C Offset temperature sensor 15 415 C Startup delay after power failure 0 99 Minutes Relay on at sensor failure 0 No 1 Yes Differential maximum alarm 1 15 C 1 Differential minimum alarm 1 15 C 1 Time delay maximum alarm 0 99 Minutes 0 Time delay minimum alarm 0 99 Minutes 0 Offset set point High Maximum 0 20 C 0 Offset set point Low Minimum 20 0 C 0 Relay alarm func
6. tion 0 1 0 O watchdog alarm 1 regulated alarm Auto reset alarm after temperature recovering O hold 0 No 1 Yes 90 Network number only at ALFANET 33 95 Software version 96 Production year 97 Production week 98 Serial number x1000 99 Serial number units Function diagram Minimum Alarm Maximum Alarm Meassured Diff max lt Value Offset minimum Offset maximum Setpoint Setpoint Minimum Maximum Alarm Alarm Dimensions Connection diagram If applicable Trafo 3VA 230 12Vac VDH art nr 350 010073 230Vac 60 69 5 ALFA NET 3X series L dc 0V N de V SUPPLY Vac Vdc see product sticker RS 485 NETWORK CONNECTIONS 2 twisted pair shielded cable One of the Controllers can be the PC Interface Repeater is also a contr Shield only at one side of T the cable to Earth gone side of the cable to Earth IOT SLLLS Si CS a Sb RL Endpoint Network cable Connection Network 2 twised pair shielded point min 0 5mm Network Pair 1 A B Pair 2 Gnd Max Cable lenath 1KM T Shield only at c ir Line B Lo Address VDH Products BV Produktieweg 1 9301 ZS Roden The Netherlands F KS lt SCO om A cf KDLC Place Terminator resistor of 250 Ohm only at both ends of the RS485 cable between line A and line B May be provided in
Download Pdf Manuals
Related Search