User manual ALFANET 71 AI
Contents
1. 0000 000 0 00 00 0 000 Minimum value Maximum value Switching differential relay 1 Set point offset relay 1 Switching differential relay 2 Set point offset relay 2 Switching differential relay 3 Set point offset relay 3 Minimum adjustable set point BL 993 9 i 99 G9 Maximum adjustable set point SLOGI ic OO G9 Alarm type 0 Non 1 Absolute 2 Relative Minimum alarm set point STOJ 29 99 09 Maximum alarm set point S19 99 s GOOG ime delay minimum alarm 0 99 Minutes ime delay maximum alarm 0 99 Minutes Relay function alarm relay O Fail safe alarm 1 Control alarm Reset alarm relay when alarm recovers O No 1 Yes Reset alarm relay at manual reset O No 1 Yes Network number Software version Production year Production week Serial number x1000 Serial number eenheden Digital point changes at changes from parameter 6 Error codes On the display from the ALFANET 71 Al the following error codes can appear LO Minimum alarm HI Maximum alarm EE _ Settings are lost Solution EE Reprogram the settings Working Alarm If an alarm occurs the buzzer will go on if present and an error code will appear on the display The ALFANET 71 Al remembers the error code parameter P36 default on 0 even if the alarm has recovered The error code can be resettet with the UP key if parameter P37 is 1 If the alarm is still there after pushing the UP key the ALFANET 71 AI will show the error co2. the set point is read out A few seconds after releasing the SET UP key the set point disappears and the measured value is shown again Changing the set point Push the SET UP key so the set point appears on the display Release the SET UP key By pushing the UP or DOWN keys the set point can be changed A few seconds after releasing the keys the set point disappears and the measured value is shown again Internal parameters Besides the adjustment of the set point it is also possible to adjust the internal control functions as the offsets set point range read out range and alarm values By pushing the PRG DOWN key for more than 10 seconds the internal parameter menu will be active On the left display the upper and lower segments will flash Through the UP key the required parameter can be selected See the table for the parameters When the required parameter has been selected it can been read out by pushing the PRG DOWN key By pushing the UP and DOWN key the parameter can been changed If no key is pressed for 5 seconds the ALFANET 71 Al will go back to the selection mode If the controller is in the parameter selection mode and no key is pressed for 20 seconds the ALFANET 71 Al will go back to the normal read out mode Parameters ALFANET 71 Al sie 1 2 3 Function relay 1 Function relay 2 Function relay 3 1 Raise value 2 Lower value 3 Alarm Input mode O 0 20 mA 4 20 mA Digital point
3. 900 Produktieweg 1 Fax 31 0 50 30 28 980 9301 ZS Roden Email info vdhproducts nl Nederland Internet www vdhproducts nl Dimensions 70 ye 28 60 65 69 5 Laen 38 Connections REMARK Connect a 250 Ohm Terminator m A Resistor between Line A and Line B lt at both CABLE ENDS of RS485 Network on lt 3 05E BOPWUVE ee NTN on own oO OzEBwW ALFA NET 71 Al a BSET OeNuE ate 3VA 230 12Vac fo VDH art nr 0 350 010073 230Vac oj 9 12V out o S S max 50mA S 2 s E a e1 al al S ol al S i External Supply SEN A Max o o ox 28Vdc Porras a Saas 2E Supply mA Sensor Bree 12Vac for example ero 1 C0 sensor Tore SE 3 wire or o L vceu oo erorou re E lt o SC RS 485 NETWORK CONNECTIONS 2 twisted pair shielded cable Controller 1 One of the Controller 2 Place Terminator resistor Controllers of 250 Ohm only at both canbethe lonon o aa ends of the RS485 cable OOO Pe intatiace Between line A and line 7 OOO B GND Repeater is May be provided in the p op a contr controller with a jumper For signal conditioning eee S Ey DOLL Endpoint Network cable Co
4. User manual ALFANET 71 Al prg Controller with programmable gt ber Analogue Input Input 0 20mA or 4 20mA VDH doc 080423 Version v1 0 Date 19 03 2008 Software ALFANET71CO2 File Do080423 wpd Range 1999 9999 Description The ALFANET 71 Al Analog Input is a controller with a 0 20mA or 4 20mA input The range and the relay functions can be programmed Because of this the controller can be used with several types of sensors Examples of sensors which can be used are pressure sensors temperature sensors or CO2 sensors Through the internal parameters the range and the decimal point can be adjusted The measured value can be read out in whole tenth hundreds or thousands units Installation On the connection diagram from the ALFANET 71 Al is shown how the sensor network power supply and the relays should be connected After power up a self test is started After the self test the actual value will be shown on the display Control The ALFANET 71 Al display unit can be adjusted with two hidden keys A UP SET upper right corner besides the display for increasing the adjusted value Vv DOWN PRG lower right corner besides the display for decreasing the adjusted value pK Ube L Vol DOWN ALFA 70 Viewing the set point By pushing the SET UP key the adjusted set point will be visible Also the decimal point from the most right display will be flashing for indication that
5. de and the measured value alternated As soon as the alarm is recovered the error code disappears and the measured value will been shown again The function from the alarm relay can been changed with parameter P35 default fail safe alarm to control alarm This means that if an alarm occurs the alarm relay will be energized At fail safe alarm the relay is always energized and if an alarm occurs the relay will be de energized With parameter P30 it is possible to choose the kind of alarm It is possible to get no alarm an absolute alarm or a relative alarm Relative alarm means that the alarm is connected to the set point Technical data Type ALFA NET 71 Al Analog Input Range 1999 9999 adjustable through parameters Supply 12 Vac de 5 10 Read out 4 digit 7 segments display Input 0 20ma or 4 20mA dc with Ri 500hm Communication RS 485 Network 2xtwisted pair shielded Relays The relays have one common Ry 1 Out 1 SPST NO 250V 8A cos o 1 Ry 2 Out 2 SPST NO 250V 8A cos o 1 Ry 3 Out 3 Alarm SPDT NO NC 250V 8A cos 1 Control through push buttons on the front Front Polycarbonate IP65 Dimensions 35 x 77 x 71 5mm hwd Panel cut out 29 x 70mm hw Accuracy 0 5 from the range Provided with memory protection during power failure Connections with screw terminals on the back side Special versions on request available si Address VDH Products BV Tel 31 0 50 30 28
6. nnection Network cable Endpoint only on one side of cable Network 2twised pair shielded point 2 twised pair shielded Network min 0 5mm Network min 0 5mm Pair 1 A B Pair 2 Gnd 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 4 z G Place Pullup down resistors 0 Network connections X 2 F F Shield only at Shield onlyat Only at one point in the S Pair 1 EIG a one side of aonesideof Network May be provided in Connect A HI to A HI i Eat the cable FT thecable the controller with jumpers Q pooner B LO to B LO 4 jF to Earth to Earth Or use ALFA 1 TERMINATOR Connect GND 0V to GND 0V Shield Connect Shield to clean Earth
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