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User manual ALFANET 79 PI Hygrostat.

1. lon REMARK Connect a 250 Ohm Resistor between no op SUPPLY IN Line A and Line B at both CABLE ENDS v as 1 za of RS485 Network 2 wire with shield me GO nN a ovo v col lt c af Lon 0 oj o os E oa c ac 7 ANY J222 z zx ALFANET 79 PI cens 2 L 2r r 230Vac Fuse 315mA 50 60Hz Fuse 315mAT m 50 60Hz LMS MODULE e Out 1 Out Outs von Tzu Ov ez Gu 420 b Supp ly Supply Supply Out 1 Out 2 Out 3 Beel oococoeeeeee sS a a S gt gt le o amp z 5 gt ei gt eS gt trl J gt FIs lF lott le lh Gh sok sahe S S SUPPLY OUT o ze c ec amp aem e ee 1 1 1 1 cz mw ec c E a w o o wet ie EOM Gs 34442 ME a ee EE E L G al C Rd we oj o A 4 o o a c gt gt Y A Sm Relay outputs SUPPLY Humidity P I 2Vdc sensor output from LMS 0 10Vdc SUPPLY UNIT GND SIGN EH2v LJ RH970 sensor LC95 2 sensor RH95 2 sensor Address VDH Products BV Tel 31 0 50 30 28 900 Produktieweg 1 Fax 31 0 50 30 28 980 9301 ZS Roden Email info vdhproducts nl The Netherlands Internet www vdhproducts nl
2. on The code 110 means that relay 1 and relay 2 are on and relay 3 is off Setting internal parameters Next to the adjustment of the set point some internal settings can be made like differentials sensor adjustments set point range and alarm settings By pushing the DOWN key for more than 10 seconds you enter the internal programming menu On the left display the upper and the lower segments are flashing Over 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 no key is pushed for 20 seconds the ALFANET 79 PI changes to it s normal operation mode Sensor adjustments The sensor can be adjusted by using the offset sensor parameter 05 Indicates a sensor e g 2 RH too much the according Sensor offset parameter has to be decreased with 2 RH Error codes On the display from the ALFANET 79 PI can appear the following error messages rLO Minimum RH alarm Solution E1 rHl Maximum RH alarm Check if the sensor is connected well E1 RH sensor defect Check the RH signal 0 100 RH 0 1 Vdc Replace the sensor EE Adjustments are lost Solution EE Reprogram the adjustments L In case of a short circuit sensor the display will show E1 and L alternating H In case of a broken senso
3. User manual ALFANET 79 PI ms RH Hygrostat SET ser ALFA 79 VDH doc 080658 Version v1 0 Date 20 05 2008 Software ALFANET79 PI File Do080658 WPD Range 0 100 RH Installation On the upper side from the ALFANET 79 PI is shown how the sensor supply output and relays should be connected After power up a self test is started If the self test is completed the measured humidity will be shown on the display The ALFANET 79 PI can be read out and controlled on the PC Control The ALFANET 79 PI hygrostat can be controlled by four push buttons on the front SET viewing changing the adjusted value and reset alarm UP raise the adjusted value DOWN lower the adjusted value RH hidden key above the SET key Viewing the set point By pushing the SET key the adjusted set point can be read out The led set also starts flashing A few seconds after releasing the SET key the set point disappears and the measured value will be visible again Changing set point Push the SET key and the set point appears in the display Release the SET key Push the SET key again together with the UP or DOWN keys to change the set point A few seconds after releasing the SET key the set point disappears and the measured humidity is shown again Status of the Relays By pushing the hidden RH key the display shows the status of the relays The three digits are indicating the status from the relays hereby O off and 1
4. r the display will show E1 and H alternating Working Alarm If there occurs an alarm the message can be reset with the SET key The function from the reset depends of parameter P37 Technical details ALFANET 79 PI Hygrostat 0 100 RH read out per 196 RH 3 digit 7 segments display LED SET and LED RH 12 16 Vdc from LMS Supply unit Ry1 SPST NO 250V 8A cos 1 of 250V 5A cos 0 4 Type Range Read out Status LEDs Supply Relays Communication Control Front Sensor Analogue output Dimensions Panel cut out Accuracy Ry2 SPST NO 250V 8A cos 1 of 250V 5A cos 0 4 Ry3 SPDT NO NC 250V 8A cos 1 of 250V 5A cos 0 4 Relays have one common C RS485 network 2x twisted pair shielded cable Through push buttons on the front Polycarbonate RH 95 412Vdc 0 100 RH 0 1Vdc 0 10Vdc PI output 35 x 77 x 71 5mm hwd 29 x 71mm hw 0 596 from the range Provided with memory protection during power failure Equipped with self test function and sensor failure detection Connection with screw terminals Special version on request available Parameters ALFANET 79 PI Para Description Parameter Range Default Meter value 1 01 02 03 04 05 Function Relay 1 Function Relay 2 Function Relay 3 Function PI output Offset humidity sensor Offset PI zone P band adjustment I time adjustment Switching differential Offse
5. t relay 1 Switching differential Offset relay 2 Switching differential Offset relay 3 Minimum adjustable set Maximum adjustable set Type Alarm Minimum alarm set point Maximum alarm set point Time delay minimum alarm Time delay maximum alarm Relay function alarm relay Reset alarm relay after recovering alarm Reset alarm relay after manual reset Control delay after power failure Forced relay function at sensor failure Network number Software version Production year Production week Serial number x1000 Serial number units l Humidifying 2 Dehumidifying 3 Alarm 1 Humidifying 2 Dehumidifying 3 Alarm 1 Humidifying 2 Dehumidifying 3 Alarm 1 Humidifying 2 Dehumidifying 15 415 RH 15 15 RH 1 100 RH 0 99 Minutes 1 15 RH 15 15 RH 1 15 RH 15 15 RH 1 15 RH 15 15 RH 100 RH 100 RH Non Absolute Relative 100 RH 100 RH 99 min 99 min control alarm No Yes No Yes H onb onm noooooNnmnrmo 99 min No Humidifying Dehumidifying fail safe alarm Dimensions 77 N R 7o EN ESSE fs v B LS SS 60 65 E pi LL E e a up 69 5 Connections

User manual ALFANET 79 PI Hygrostat.

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