MC 785D-6p OF - VDH Products
Contents
1. V1 0 MC 785D 6P F Client General Page 3 of 12 1 Technical specifications General Type Wall mount version Housing Material Dimensions Front Panel mount version Housing Material Dimensions Panel cut Front Range Power supply Power consumption Operating temperature Store temperature Operating RH Accuracy Front Display LED s Keys MC 785D 6P F Grey plastic Polystyrol 454h KG 2 natur BASF 213 x 180 x 85mm whd Polycarbonate IP 44 Steel panel mount housing Steel painted silver grey 217 x 155 x 85mm whd min 208 x 146mm wh Polycarbonate IP 44 40 120 F per 0 1 F 120 Vac 50 60 Hz 10 5 or other see sticker 9 VA 5 120 F 5 140 F 10 90 RH not condensing 0 5 of the range 4 digit digital display for temperature indication 4 digit digital display for setpoint indication Led Relay cooling active w Led Relay heating active 07 Led Alarm active S1 Temperature sensor 1 read out S2 Temperature sensor 2 read out 3 Temperature sensor 3 read out S4 Temperature sensor 4 read out S5 Temperature sensor 5 read out S6 Temperature sensor 6 read out ON OFF On off key controller PRG Program key a Up key y Down key SENS Sensor read out key SETP Setpoint key Document nr 061775 Version V1 0 MC 785D 6P F Client General Page 4 of 12 In and Outputs Sensors Senso2. on if the temperature is higher then setpoint offset_1 differentie_1 en switches off if the temperature is lower then setpoint offset_1 Cooling 2 RY3 switches on if the temperature is higher then setpoint offset_2 differentie_2 and switches off if the temperature is lower then setpoint offset_2 2x heating Heating 1 RY2 switches on if the temperature is lower then setpoint offset_1 differentie_1 and switches off if the temperature is lower then setpoint offset_1 Heating 2 RY3 switches on if the temperature is lower then setpoint offset_2 differentie_2 and switches off if the temperature is lower then setpoint offset_2 Cooling heating Cooling RY2 switches on if the temperature is higher then setpoint offset_1 differentie_1 and switches off if the temperature is lower then setpoint offset_1 Heating RY3 switches on if the temperature is lower then setpoint offset_2 differentie_2 and switches off if the temperature is higher then setpoint offset_2 Function HEAT Function COOL Setpoint Function Diagram Cool Heat Document nr 061775 Version V1 0 MC 785D 6P F Client General Page 8 of 12 6 Sensor calibration With the parameters P21 to P26 the sensors can be calibrated Indicates e g a sensor 0 2 F too much that offset parameter must be set 0 2 F lower 7 Alarms If there is no alarm the alarm relay is on and during alarm the alarm relay drops Now also a
3. MC 785D 6p F wall or panel mount User manual ox ev ED cnong MC785D 6p Describtion MC 785D 6P F Thermostat with max 6 temp sensors Doc nr 061775 Type MANUAL Number of pages 12 Version V1 0 File Do061775 MC785D 6P F v10 y BJB Date 22 06 2006 EN wpd Software MC785D 6P Version V1 00 VDH Products BV Roden Holland File Doc 06 Document nr 061775 Version V1 0 MC 785D 6P F Client General Page 2 of 12 Table of Contents 1 Technical specifications 0 0000 cc eee 3 2 Functional Specifications 235 2 e eeteeein ge dipeela deded dhawe angele ede peiauindap els 4 3 Operation up anana tara Read Cah aah A a Matas tha als Dating ae date et dads a Base Hoes 5 4 Programming Internal Settings 0 ete eee 6 5 Operation of relay outputs 00 20 7 6 Sensor calibro e ere niee rte ESEE TETEE OE ee ibe Mie TE TA ia ted 8 a T ts Me a Micha are a a tle ARI le ts a a a ih nas EA a A aide 8 SAFPONEVIGWS fain Sek iets ha ENEE PARE EENE E Se tae da baa le Spawn d eens 9 9 Connection diagraM arca a ea a tetas 10 102 DIMENSIONS 2 ereat peed whtd aiae Mind wedded d Ad edeh poe whith dfulwedn ied aneded Me 12 The information contained in this document is assumed to be accurate However VDH Products BV accepts no liability for eventual mistakes or errors and has the right to change this document without notice Document nr 061775 Version
4. hite Pt100 3 wired foal ost Sensor 4 brown g Ss green white Pt100 3 wired co Sensor 3 brown reen p white Pt100 3 wired Sensor 2 brown reen hi Pt100 3 wired white Sensor 1 brown Drawing 061675 Wall mounting Document nr 061775 Version V1 0 MC 785D 6P F Client General Page 11 of 12 green green 1 0 input output PE earth Drawing 061778 Panel mounting Pt100 3 wire Temp sensor 1 Pt100 3 wire Temp sensor 2 Pt100 3 wire Temp sensor 3 Pt100 3 wire Temp sensor 4 t100 3 wire p sensor 5 a 0 Oo Pt100 3 wire Temp sensor 6 VDH Network connection Relay outputs with one common RY2 Function 1 RY3 Function 2 Relay output RY1 Alarm Supply 120Vac 50 60Hz Document nr 061775 Version V1 0 MC 785D 6P F Client General Page 12 of 12 10 Dimensions Jo 124 5 35 1 OO 190 E gt MC785 serie wall mounting drawing 940024 207 Panel cutout Topview a 217 85 10 1o 5 a Frontview Rightside view MC785 serie panelmounting drawing 961271
5. n alarm is given during a power failure During alarm the alarm LED on the front flashes An alarm can be cause by No control sensor present F1 Sensor broken E1 E2 E3 E4 E5 or E6 A sensor gives a minimum or maximum alarm LO or HI By pressing the PRG key during alarm the alarm relay will be reset The alarm message remains in the display during the failure Also the alarm LED will continue flashing Temperature alarm LO Minimum alarm HI Maximum alarm No control sensor F1 No control sensor present Sensor failure E1 Sensor 1 broken E2 Sensor 2 broken E3 Sensor 3 broken E4 Sensor 4 broken E5 Sensor 5 broken E6 Sensor 6 broken Document nr 061775 Version V1 0 MC 785D 6P F Client General Page 9 of 12 8 Front views esi s4 s2 s5 s3 sS6 EED SFUEIGE _uerso s Drawing 061779 Wall mounting w v a MC785D 6p Drawing 061776 Panel mounting Document nr 061775 Version V1 0 MC 785D 6P F Client General Page 10 of 12 9 Connection diagram PE earth Supply 120Vac 50 60Hz C zino Relay output c RY1 Alarm C_common O RY2 Relay output with one common C RY5 RY2 Function 1 QO RY5 RY3 Function 2 GND shield N S LO x VDH Network HI connection green A ISi white Pt100 3 wired Sensor 6 is brown gE reen 55 white Pt100 3 wired ajo Sensor 5 gE brown SE reen BIE w
6. r 1 Pt 100 3 wire to DIN IEC 751 Sensor 2 Pt 100 3 wire to DIN IEC 751 Sensor 3 Pt 100 3 wire to DIN IEC 751 Sensor 4 Pt 100 3 wire to DIN IEC 751 Sensor 5 Pt 100 3 wire to DIN IEC 751 Sensor 6 Pt 100 3 wire to DIN IEC 751 Relays RY1 Alarm C NO NC 250Vac 10A not inductive Normal C NO is closed at alarm C NC is closed Following relays have one central common RY2 Function 1 NO 250Vac 10A not inductive RY3 Function 2 NO 250Vac 10A not inductive Others Network connection option 2 Functional specifications The MC 785D 6P is a thermostat to which a maximum of six temperature sensors can be connected The temperature is controlled on the average of the active sensors The thermostat can be programmed with the control functions one stage cooling RY2 or two stage cooling RY2 and RY3 or one stage heating RY2 or two stage heating RY2 and RY3 or cooling RY2 and heating RY3 The MC 785D 6P has an alarm relay which switches on if the temperature of one of the sensors drops below or above the preset alarm levels The selection of the above mentioned settings is done thru the Internal Parameters Document nr 061775 Version V1 0 MC 785D 6P F Client General Page 5 of 12 3 Operation Normally the temperature display shows the average temperature of the active control sensors and the setpoint display the current setpoint De LED s S1 to S6 indicate which temperature sensors are acti
7. uired parameter can be selected The value of the parameter is shown in the lower display By pushing the SETP and the UP or DOWN key simultaneously the value of the parameter can be changed If during 30 seconds no key is touched or if the PRG key is pressed the display returns to the normal operation mode Parameter table Function thermostat 0 1x cooling 1 2x cooling 2 1x heating 3 2x heating 4 cooling heating Differential function 1 Offset function 1 Differential function 2 Offset function 2 Sensor 1 present Sensor 2 present Sensor 3 present Sensor 4 present Sensor 5 present Sensor 6 present Offset Sensor 1 Offset Sensor 2 Offset Sensor 3 Offset Sensor 4 Offset Sensor 5 Offset Sensor 6 eleleloelolo ee Ts Minimum alarm temperature Maximum alarm temperature Min alarm delay z Minutes Max alarm delay ie Minutes Alarm relay off after reset alarm VVUUVUVUVU VVUVUVUVUVUUVUVUUVUUUNVU UUU 11 12 13 14 15 16 21 22 23 24 25 26 30 31 32 33 34 Minimum setpoint 40 120 Maximum setpoint 40 120 Read out above 10 F 0 No per degree 1 Yes Read out below 10 F 0 No per degree 1 Yes Network number Software version number Serial number Production date year wk Document nr 061775 Version V1 0 MC 785D 6P F Client General Page 7 of 12 5 Operation of relay outputs Operation of the cooling and heating 2x ccoling Cooling 1 RY2 switches
8. ve and the status LED s show if the thermostat is cooling heating or if there is an alarm Read out of the sensors Press the SENS key The LED S1 lights and in display shows the temperature of sensor 1 By pressing the SENS key again the other sensors can shown When all sensors are displayed the average temperature appears again in the display Changing the setpoint Push simultaneously on the SETP and the UP or DOWN key to change the setpoint Switching sensors on and off Push the SENS and PRG key simultaneously The upper display shows the text S1 and the lower display ON if the sensor is switched on or OFF if the sensor is switched off By pressing the SETP key the sensor can be switched ON or OFF If the sensor is switched off in this way the sensor can still be read out but it doesn t count in the regulation With the UP and DOWN keys the other sensors can be watched and switched ON or OFF as above mentioned Reset the alarm As soon as an alarm situation occurs and an error message in the display appears can by pressing the PRG key the alarm be reset The error message remains in the display until the cause of the error is solved Document nr 061775 Version V1 0 MC 785D 6P F Client General Page 6 of 12 4 Programming Internal Settings By pressing the PRG key for more than 5 seconds the Interne Parameters are shown In the upper display appears a P with a number With the UP or DOWN key the req
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