User Manual ALFA 23 DP and ALFANET 23 DP -10
Contents
1. Para Description Parameter Irane a Standard meter Value Minimum setpoint setting 10 0 90 0 C 10 0 o3 Maximum setpoint setting 10 0 90 0 C 90 0 Offset temperature sensor sensor adjustment 15 0 15 0 C 0 0 10 Startup delay after power failure 0 99 Minutes 0 11 Relay on at sensor failure 0 No 1 Yes 0 Differential maximum alarm 0 1 15 0 C Differential minimum alarm 0 1 4 15 0 C Time delay maximum alarm 0 99 Minutes Time delay minimum alarm 0 99 Minutes Offset minimum alarm 10 0 10 0 C Offset maximum alarm 10 0 10 0 C Relay alarm function 0 1 O watchdog 1 regulated alarm Auto reset alarm after temperature recovering O hold alarm 1 don t hold alarm Reset alarm after manual conformation despite the alarm situation is not solved 0 No 1 Yes 0 No 1 Yes 90 Network number only at ALFANET 95 Software version 96 Production year 97 Production week 98 Serial number x1000 99 Serial number units Funktion diagram Minimum Alarm L Maximum Alarm H Meassured Diff max pan Value alarm Offset min Offset max alarm Setpoint Setpoint alarm Minimum Maximum Alarm Alarm Technical details Model ALFA 23 DP Alarm Thermostat ALFANET 23 DP Alarm Thermostat with Network Range 10 90 C readout per 0 1 C Supply 230 Vac 1 2VA 50 60Hz or else see product sticker Relay 1x SPDT contact Max 250V2. 16A C NO 8A C NC cos phi 1 Communication RS 485 Network 2x twisted pair shielded only at ALFANET model Control by pushbuttons on the front Front Polycarbonate IP65 Sensor SM 811 2 wire PTC sensor 1000Q at 25 C Sizes 144 x 72 x 50mm hwd Panel hole 139 x 67mm hw Provided with memory protection during power failure Connection with screw terminals on the backside Equipped with self test function and sensor failure detection Special versions on request available Dimensions Inbouwmaten A One of the Controllers can be the PC Interface Repeater is also a contr IHs at Shield only at d 3 2 one side of S the cable 4 ir to Earth Endpoint Network cable Network 2twised pair shielded min 0 5mm Pair 1 A B Pair 2 Gnd 144 Connections Shield only at one side of the cable to Earth Place both term jumpers J2 J3 at both ends Pair 2 2xGND 0V to 2xGND 0V of the RS485 network cable for termination Cable Min 0 5mm and max lenght1KM Connect Pair 1 Line A to Line A and Line B to Line B M A Supply 1 Relay ayrsdas Viei Vne o3gvac output Network cable 2 T2 T1 50 60Hz SPDT 2xTwisted pair Temp sensor s orelse see Max 16A Shielded type SM811 sticker at cosp 1 Remarks 1 No relay on ALFA NET 20 2 Optional second sensor 3 RS485 only at ALFANET series Place Terminator resistor of 250 Ohm only a
3. User Manual ALFA 23 DP and ae ALFANET 23 DP 10 90 C 0 1 Minimum Maximum Alarm Thermostat VDH doc 072650 Version v1 2 Datum 08 06 2012 Software 072643 ALFA 13 23 33 DP2 File Do072650 wpd Range 10 90 C per 0 1 C Function The ALFA NET 23 DP is a digital alarm thermostat for wall and panel mounting The temperature is readout in tents of degrees Celsius The thermostat watches the minimum and maximum temperature To report a alarm the ALFA NET 23 DP has one relay for both alarms The ALFANET 23 DP has a RS 485 network connection so it can be read out and adjusted on the Alfanet Installation On the topside op the ALFA NET 23 DP is shown how the sensor power supply and relay are connected After connecting the ALFA NET 23 DP to the power supply it takes a few seconds to show the measured temperature in the display The alarm relay is a multi functional combined minimum and maximum alarm at alarm the LED set high is lit in the display Control The ALFA NET 23 DP 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 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 push
4. he sensor fault is solved the relay works again according to setting of parameter 27 as the sensor fault is shall be confirmed by hand or an alarm is detected In most situations it will be logical to set Parameter 11 and 27 to the same value Sensor adjustment The sensor can be adjusted by using the Sensor Offset parameter 04 Indicates the ALFA NET 23 DP e g 0 2 C too much the Sensor Offset has to de decreased by 0 2 C Error messages In the display of the ALFA NET 23 DP 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 Settings must be reprogrammed Setting internal parameters Next to the adjustment of the setpoint some internal settings are possible like differential sensor offset setpoint range and alarm settings 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 23 DP changes to it s normal operation mode Parameter ALFA NET 23 DP
5. ing the SET key first and then the DOWN key together the maximum alarm set point appears 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 set points Push the SET key together with the UP or DOWN key and the maximum alarm set point 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 set point can be changed A few seconds after releasing the keys the measured temperature is shown again in the display Operation of the alarm functions This alarm thermostat has two adjustable alarms namely a minimum and a maximum alarm Whereby can be chosen from watch or control alarms Parameter 27 Watch Alarm The relay is normally activated and LED set high is off At alarm the relay is deactivated and the LED set high is lit This is also the case at power failure Control Alarm The relay is normally deactivated and the LED set high is off At alarm the relay is activated and the LED set high is lit Furthermore an alarm can be hold or reset automatically parameter 28 lf alarms are hold default the alarms must be confirmed by pressing the SET button Only when the alarm cause is solved and the alarm is confirmed the relay is set to its normal position lfalarms are not hold and the alarm cau
6. se is solved the alarm will automatically reset and the relay is set to its normal position Also an offset zone and the differential for each alarm can be set See the function diagram Furthermore a delay time Parameter 23 and 24 for each alarm can be set during the delay time the led set high flashes If after ending the delay time the alarm is still present an alarm is given and the relay is set into the alarm position If the temperature is recovered within the delay time than there will be no alarm In the display is continuously shown H at maximum alarm and L at minimum alarm Once the alarms are confirmed the measured temperature is shown again alternating with any outstanding actual alarm indications With parameter 29 set to 1 Yes the relay of the controller can be set to its normal position by confirming the alarm although the alarm is not being solved Then the led set high is switched off the relay is set to its normal position and the display starts showing the measured temperature again alternated with the outstanding alarm indications Sensor Fault Detection If a sensor fault is detected there is error message Er in the display and the relay works according to the setting of parameter 11 The error remains in the display until it is manually confirmed by pressing the SET key Once the sensor fault is confirmed by the measured temperature is displayed alternating with any outstanding actual error After t
7. t 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 V Network connections Shield only at Only at one point in the gt Pair 1 ry oneside of Network May be provided in Connect A HI to A HI S thecable the controller with jumpers z Pe B LO to B LO f to Earth Or use ALFA 1 TERMINATOR Connect GND 0V to GND 0V a See ween ra Shield TO SJR an OOT Connect Shield to clean Earth Connection Network cable Endpoint only on one side of cable point 2 twised pair shielded Network Network min 0 5mm Max Cable length 1KM 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 ZR Roden The Netherlands Tel Fax 31 0 50 30 28 980 Email info vdhproducts nl Internet www vdhproducts nl 31 0 50 30 28 900
Download Pdf Manuals
Related Search