User manual ALFANET 71 PI Thermostat.
Contents
1. VDH art nr 350 010073 L N 230Vac Address VDH Products BV Produktieweg 1 9301 ZS Roden The Netherlands OOO O 77 KO C SET ALFA 3x EE 35 12 60 12Vac 69 5 65 REMARK Connect a 250 Ohm Resistor between a Line A and Line B at both CABLE ENDS of RS485 Network 2 wire with shield ALFANET 71 PI 2 wire with shield n c GND Shield RS485 Cable Common Ryl no Ry2 no Ry3 no Ry3 nc RELAY OUTPUTS Tel Fax Email Internet wi Temp sens Common OV br 12Vac inp 12Vac inp Temp sens SM811 SUPPLY OUTPUT 12Vac 0 10Vdc 31 0 50 30 28 900 31 0 50 30 28 980 info vdhproducts nl www vdhproducts nl2. Switch on relay 2 by Switch on relay 3 by Switch on delay relay 2 Switch on delay relay 3 Switching differential relay 1 Setpoint offset relay 1 Switching differential relay 2 Setpoint offset relay 2 Switching differentia relay 3 Setpoint offset relay 3 Switch on delay cooling Switch off delay cooling Parameter 20 21 in Sec or Min Minimum on time cooling Minimum off time cooling Minimum setpoint Maximum setpoint Read out above 10 C per 1 C Alarm type to setpoint Minimum alarm setpoint Maximum alarm setpoint Time delay minimum alarm Time delay maximum alarm Relay function alarm relay Reset alarm relay after recovering alarm Reset alarm relay after manual reset Start up delay after power failure Forced relay function at sensor failure Network number Software version Production year Production week Serial number x1000 Serial number units 15 0 15 0 C 15 0 15 0 C 0 0 20 0 C 0 99 Minutes 0 Temperature 1 Time 0 Temperature 1 Time 0 99 Minutes 0 99 Minutes 0 1 15 0 15 15 0 1 15 0 15 15 0 1 15 0 15 15 ououow 0 0 0 Seconds 1 Minutes 0 99 Minutes 0 99 Minutes 50 0 50 0 C 50 0 50 0 C 0 No 1 Yes 0 None 1 Absolute 2 Relatief 50 0 50 0 C 50 0 50 0 C 0 99 min 0 99 min Watch alarm Control alarm No Yes Noe Yes 99 Minutes None Cool Heat Dimensions Connections Trafo 3VA 230 12Vac O
3. User manual ALFANET 71 PI oc Thermostat SET ALFA 71 VDH doc 002148 Version v1 0 Date 29 09 2000 Software ALFA NET 71PI File Do002148 WP8 Range 50 50 0 C Installation On the top side of the ALFANET 71 PI is shown how the sensors power supply relays and 0 10Vdc PI output has to be connected After connecting the ALFANET 71 PI to the power supply a self test function is started As this test is finished the measured temperature appears in the display And the ALFANET 71 PI is by use of the ALFANET PC INTERFACE controllable on the PC Control The ALFANET 71 PI thermostat can be controlled by four pushbuttons on the front These keys are SET view change the setpoint UP increase the setpoint DOWN decrease the setpoint C hidden push button above the SET key and behind C symbol Viewing setpoint By pushing the SET key the setpoint appears in the display The decimal point of the last display starts blinking A few seconds after releasing the SET key the setpoint disappears and the measured temperature is shown again in the display Changing setpoint Push the SET key and the setpoint appears in the display Release the SET key Now push the SET key again together with the UP or DOWN keys to change the setpoint A few seconds after releasing the keys the measured temperature shows again in the display Status of the Relays By pushing the hidden C key the display shows the stat
4. ication for a short circuit sensor H In case of open circuit sensor the display alternates between error code E and H as indication for a open circuit sensor Reset Alarm When a error messages appears it can be resetted by pushing the SET key The function of this key depends on parameter P37 Technical details Type ALFANET 71 PI Thermostat Range 50 50 0 C above 10 C display per 0 1 C Supply 12Vac 50 60Hz 5 10 Display 3 digit 7 segment display Relays Ry1 SPST NO 250V 8A cos 1 of 250V 5A cos 0 4 Ry2 SPST NO 250V 8A cos 1 of 250V 5A cos p 0 4 Ry3 SPDT NO NC 250V 8A cos 1 of 250V 5A cos p 0 4 Relays have one common C Control By push buttons on front Communication RS485 Network 2 wire shielded cable min 0 75mm Front Polycarbonate IP65 Sensor SM 811 2m PTC 10000 25 C Analog output 0 10 Vdc PI output cool or heat Dimensions 35 x 77 x 71 5mm HWD Panel cutout 28 x 70mm HW Accuracy 0 5 of the range Provided with memory protection during power failure Connections with screw terminals on the back side Equipped with sensor failure detection Special versions on request available Parameters ALFANET 71 PI Para Description Parameter Range Default meter Function Relay 1 Function Relay 2 Function Relay 3 Function PI output Offset temperature sensor 1 Setpoint offset PI function P band setting I time setting
5. us of the relays Each display segment shows the status of the relay output showing O off and 1 on The code 110 means relay 1 and 2 are on and relay 3 is off Setting internal parameters Next to the adjustment of the setpoint internal settings can be made like differential sensor offset setpoint range and the functions of the thermostat Push the DOWN key more than 10 seconds to enter the Internal Programming Menu In the left display the upper and lower segment are blinking 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 or DOWN key to change the value of this parameter If after 20 seconds no key is pushed the ALFANET 71 PI changes to the normal operation mode Adjustment sensors The temperature sensor can be adjusted by using the Sensor Offset parameter 05 Indicates the Sensor e g 2 C to much the Sensor Offset has to be decreased with 2 C Error messages In the display of the ALFANET 71 PI the following error messages can appear LO Minimum alarm Solution E1 HI Maximum alarm Check if the sensor is connected correctly E1 Sensor 1 failure Check sensor 1000Q at 25 C Replace sensor EEE Settings are lost Solution EEE Reprogram the settings L In case of sensor short circuit the display alternates between error code E and L as ind
Download Pdf Manuals
Related Search