User manual ALFA(NET) 30 Thermometer.
Contents
1. Place Terminator resistor of 250 Ohm only at both fant de 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 KSKDCHIKSKDC gt CHIS EPH SR SORI RSMO COC mE RIK Network cable 2 twised pair shielded min 0 5mm Pair 1 A B Pair 2 Gnd REMARK To terminate RS485 Network Connect a 250 Ohm resistor between Line A and Line B at both cable ends 3 cc N D i Optional RS485 SM811 NETWORK Temp 2 twisted pair sensor shielded only at one side Shield to earth of the cable ov Network connections lt Pair 1 Connect A HI to A HI Q Connect B LO to B LO Pair 2 Connect GND 0V to GND 0V Shield Connect Shield to clean Earth Endpoint only on one side of cable Network Note 1 AVOID LONG STUB CABLES No longer than 0 5M otherwise use a Repeater Address VDH Products BV Produktieweg 1 9301 ZS Roden The Netherlands Tel Fax Email Internet 31 0 50 30 28 900 31 0 50 30 28 980 info vdhproducts nl www vdhproducts nl2. 000 at 25 C 2 wire Sizes 35 x 77 x 71 5mm hwd Panel hole 28 x 70mm 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 are available upon request Parameters ALFA NET 30 PARA DESCRIPTION PARAMETER RANGE METER oo Offset temperature sensor 21533415 C 90 Network number 1 250 95 Software version 0 255 96 Production year 00 99 97 Production week 1 52 98 Serial number x1000 0 255 99 Serial number units 0 999 Dimensions 60 69 5 38 Connection diagram If applicable Trafo 3VA 230 12Vac VDH art nr 350 010073 ALFA NET 30 series L dc 0V N dc V SUPPLY Vac Vdc RS 485 NETWORK CONNECTIONS 2 twisted pair shielded cable One of the Controllers can be the PC Interface Repeater is also a contr IHS T lt 1 am Shield only at x b g Z zone side of d c the cable 5 l I to Earth Phebxs lt acocncecxs lt be ER p lt gt lt gt c gt cnoxax gt lt pt Endpoint Network cable Network 2 twised pair shielded min 0 5mm Pair 1 A B Pair 2 Gnd Max Cable lenath 1KM Shield only at only at one point in the onesideof Network May be provided in 7 thecable the controller with jumpers to Earth Oruse ALFA 1 TERMINATOR DOOLA Ppa Connection
3. User manual ALFA NET 30 Thermometer re Cc ALFA 30 VDH doc 053806 Version v1 1 Date 01 05 2006 Software ALFA NET 30 File Do053806 WPD Range 50 50 C Function The ALFA NET 30 is a digital thermometer for panel mounting The ALFANET 30 has a RS 485 network connection so it can be read out the Alfanet Installation On the topside of the ALFA NET 30 you can see how the sensor power supply and relay has to be connected After connecting the ALFA NET 30 to the power supply a self test function is started As this test is finished the measured temperature appears in the display Control The ALFA NET 30 thermostat has for normal use no need for controls Only for adjustment of the sensor the ALFA 30 has three hidden pushbuttons on the front These key are SET view change the setpoint UP increase the setpoint DOWN decrease the setpoint These pushbuttons are placed at the following places at the front SET To the lower right of the display UP To the upper left of the display All lee DOWN To the lower left of the display ine He i ser o ALFA 30 Setting internal parameter To adjust the sensor offset use the following instructions By pushing the DOWN key more than 10 seconds you enter the internal programming menu In the left display the upper and lower segments are blinking Over the UP and DOWN keys the required parameter ca
4. n be selected see table for the parameters In this case only 04 offset temperature sensor If the required parameter is selected the value can be read out by pushing the SET key Pushing the UP or DOWN keys together with the SET key allows you to change the value of this parameter If no key is pushed for 20 seconds the ALFA NET 30 changes to its normal operation mode Adjustment sensor The sensor can be adjusted by using the Sensor Offset parameter 04 Indicates the ALFA NET 30 e g 2 C too much the Sensor Offset has to be decreased by 2 C Error messages In the display of the ALFA NET 30 the following error messages can appear E1 Sensor broken Solution Check if the sensor is connected correctly Check the sensor 10000 25 C Replace the sensor EE Settings are lost Solution Reprogramme 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 details Model ALFA NET 30 Range 50 50 C readout per 1 C or else see product sticker Supply 230 Vac or else see product sticker Communication RS 485 Network 2xtwisted pair shielded only at ALFANET model Control by hidden pushbuttons on the front Front Polycarbonate IP65 Sensor SM 811 10
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