User manual ALFA 13 and ALFANET 13
Contents
1. User manual a A ALFA 13 and ALFANET 13 Min Max Alarm Thermostat setlow sethigh alarm C VDH ALFA 13 a al j e VDH doc 991646 Version v2 1 Date 22 11 2007 Software 043374 _ALFA 13 23 33 File Do991646 wpd Range 50 50 C per 1 C Function The ALFA NET 13 is a digital alarm thermostat for rail mounting The thermostat watches the minimum and maximum temperature The temperature readout is in hole degrees Celsius The ALFA NET 13 has one relay for both alarms The ALFANET 13 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 is shown how the sensor power supply and relay are connected After connecting the ALFA NET 13 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 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 se2. e detection Special version on request available Setting internal parameters Next to the adjustment of the setpoint some other internal settings are possible like differential sensor offset setpoint 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 table for the parameters If the required parameter is selected the value can be read out by pushing the SET key Pushing the UP and DOWN keys allows you to change the value of this parameter If after 20 seconds no key is pushed the ALFA NET 13 changes to it s normal operation mode Parameters ALFA NET 13 PARA DESCRIPTION PARAMETER STANDARD METER VALUE Minimum setpoint 50 50 C Maximum setpoint 50 50 C Offset temperature sensor 15 15 C 10 Startup delay after power failure 0 99 Minutes 11 Relay on at sensor failure 0 No 1 Yes Differential maximum alarm 1 15 C Differential minimum alarm 1 4 15 C Time delay maximum alarm 0 99 Minutes Time delay minimum alarm 0 99 Minutes Offset setpoint High Max 0 20 C Offset setpoint Low Min 20 0 C Relay alarm function 0 No 1 Yes O watchdog 1 regulated alarm Auto reset alarm after temp recovering 0 No 1 Yes Network number Software version Production year Production week Serial number x1000 Serial numb
3. er units Function diagram Minimum Alarm Maximum Alarm Meassured Diff max lt Value Offset minimum Offset maximum Setpoint Setpoint Minimum Maximum Alarm Alarm Dimensions OOOOO0000 OQOOO00000 90 62 46 59 ee o 58 23 48 Shield only at one RS 485 NETWORK CONNECTIONS 2 twisted pair shielded cable One of the Controllers can be the PC Interface Repeater is also a contr Place Terminator resistor of 250 Ohm only at both ends of the RS485 cable May be provided in the controller with a jumper For signal conditioning point to Earth a e l l o e s e ce ee ee ee G m e o m between line A and line B Connections Vac Vdc see sticker Relay 1l output Supply Alarm N V m NC NO _ _ Ni de he ON J V at a a setlow sethigh alarm C VDH ALFA 13 J2 J4 J3 gt Oo ao e Ww N aw w gt TE msc p X XK cx oD ro Sl Sa Loc V oN N O O OUS c OUST Or w X ome CoP YG SM V Lo Seva amp oa ond cs oO Oe a Er N e 3 lt oO S OWr DOH fe 2s vooo Y 053 Od py pyvaodncrravyran o nw oO V lt ov lt S o LO memm VCA SNO vs o zvp VO vaoo ar p 2 o Vote lt E z N czo mTorr 5 PA WM Lane ADPADNOHY LEA Place Pullup down resistors V Net
4. rts to blink If the temperature will recover within the delay time no alarm occurs If an alarm will continue 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 Adjustment sensor The sensor can be adjusted by using the Sensor Offset parameter 04 Indicates the ALFA NET 13 e g 2 C to much the Sensor Offset has to de decreased with 2 C Error messages In the display of the ALFA NET 13 the following error messages can appear Er Sensor broken Solution Check if the sensor is connected correctly Check the sensor 10000 at 25 C Replace the sensor EE Settings are lost Solution Reprogram the settings Technical details Model ALFA 13 Alarm Thermostat ALFANET 13 Alarm Thermostat with Network Range 50 50 C readout per 1 C Supply 230 Vac 1 2VA 50 60Hz 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 by pushbuttons on the front Front Polycarbonate IP65 sensor SM 811 2m 10000 at 25 C Sizes 90 x 53 x 58mm hwd Panel hole 46 x 53mm hw Provided with memory protection during power failure Connection with screw terminals on the backside Equipped with self test function and sensor failur
5. tpoint 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 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 and hold 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 is shown again in the display Action of the alarm functions The ALFA NET 13 alarm thermostat has a minimum alarm and a maximum alarm both with there own setpoint We can choose off two different kind of alarms Parameter 27 namely a watchdog alarm relay normally activated at alarm it falls off and the led alarm burns On power failure the alarm relay also falls off or a regulated alarm relay normally not activated at alarm it will be activated and the led alarm burns With Parameter 28 we can choose for a auto reset alarm or a hold alarm after temperature recovering Also it is possible to give both setpoints there own offset and differential see function diagram Each alarm can be set at an alarm delay time Parameter 23 and 24 when the temperature passes the set alarm point the led alarm first sta
6. work connections p Shield only at ed Shield only at only at one point in the gt Pair 1 o one side of onesideof Network May be provided in Connect A HI to A HI 5 O T the cable S 7 thecable the controller with jumpers sous B LO to B LO 4 to Earth to Earth Oruse ALFA 1 TERMINATOR Connect GND 0V to GND 0V a AN a a a T Eps OC OOO PES Shield Renee Sey er A Y Connect Shield to clean Earth Endpoint Network cable Connection Network cable Endpoint only on one side of cable Network 2twised pair shielded oe 2 twised pair shielded Network Address VDH Products BV Produktieweg 1 9301 ZR Roden The Netherlands min 0 5mm min 0 5mm Pair 1 A B Pair 2 Gnd Max Cable lenath 1KM 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 31 0 50 30 28 900 31 0 50 30 28 980 info vdhproducts nl www vdhproducts nl
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