QMBox Combined Devices User Manual
Contents
1. 5 1 2 Connecting to the object The input port of the QMS10 module is described in the table where Xn non inverting and Yn inverting inputs of the differential channel n NC the pin is reserved 15 V analog supply output 15 V analog supply output AGND Analog ground Y16 input Y15 input Y14 input Y18 input 8 YI2input 9 Y11 input 28 X10 input 10 Y10 input 22 xni 11 Y9 input 30 X8 input 12 Y8 input 13 Y7 input 14 Y6 input 15 Y5 input 16 Y4 input 17 Y8 input 18 Y2 input 19 Yi input N The correct connection of the sources of analog signal is the most important condition of the correct operation of acquisition system which allows to avoid a lot of problems during the device operation During the connection of the sources of analog signal to the device it is necessary to keep to the following recommendations 1 Differential connection presupposes measuring voltage difference between the inverting and non inverting inputs of the channel i e differential voltage However it is necessary to remember that the voltage in relation to the analog ground of the device on both inputs common mode voltage should not be higher than the acceptable input signal range 2 Correct connection of a signal to the differential input is always a three wire connection It is necessary to separate signal wires connected to a high impedance input from the common ground wir2. QMBox Combined Devices Technical Description and User Manual Revision 2 1 TECH Lh GENERADUNBEORNUSTE BON aiiuteosteitteeissie eo biete oni Ea IIo E PUISRUE PROVA ECH EXER LYRA EVI PERO P ERU E NS ER EY UE2OE CREE C FO rEPLP UR NS Ee De P000 2 PE ARCHIT PR or E cuapanassncesscusnccsusucecacsscussgaueusoceseesiacesvautisesvuceoseuten 2 De WRUNG UPSET OF OP RON m M 4 4 SYNCHRONIZATION MODES wscccssessccscesscesscescwearceusccssdenavcousdssansasvcaveaubvessdexevessstssseausuanccetedhusesusevesccesipaswoveuesessceascuses 5 5 FUNCTIONAL MODULES USED IN THE QMBOX SERIES DEVICES ccssssssccccccsssssssssccccccccesssssecees 6 5 DT OF GRO DUNS 6 5 1 1 IC Cl OCI O a E o 6 2d 2 Bra TT MTS To TAS CT NR ETT T mmm 9 25 2 DP OAD NIOD BMC Rm 11 5 2 1 Ny Zw G00 RR 11 Jud 2 Conneciineg tothe OD COE ere omer rer arr rtte aa renters M AnNM E aidia M ber rr erer tr ree 14 5 2 nuNasIbr tel imnpnypscq 16 5 3 BE I ie reeled A A EA EEAS R date ete E E E 16 Iz CO T O e O O a E E HP 17 5 4 QMS70 DISCRETE INPUT MODULE ecce emen enne hh ettet ss e ett sett sett seet seet eset seee seee n e essen s essee sete sanis 18 5 4 1 DC CU TI ONS EE EEE E A E EE E E E E N 18 5 4 2 COTE OT TODS GN E 19 5 5 QMS75 RELAY SWITCHING MODULE ccccccccccseccccesecccesccecusecscesecscuececsusecsceus
3. case you should follow its instructions choosing not to go to the Windows Update site and specifying the DRV folder on the included CD as the location of the driver Windows might not start the Found New Hardware Wizard automatically returning a driver error message in the notification area in the right bottom corner of the screen JM Device driver software was not successfully installed wx iiis Click here for details In this case you should start the Device Manager In different Windows OS versions the Device Manager is started differently For example in Windows 7 it can be started by right clicking the Computer icon then Properties and then Device Manager In the Device Manager QMBox device will appear as Unknown device You should right click on it and select Update Driver Software 5 cg IDE ATA ATAPI controllers p F IEEE 1394 Bus host controllers pm Keyboards b J Mice and other pointing dewices b A Monitors b KY Network adapters a 4 ff Ports CO Update Driver Software L bA F ESOS Disable F Uninstall Scan for hardware changes Properties QMBox Combined Devices User manual Rev 2 1 26 of 30 After this the Found New Hardware Wizard will start up aay Device Manager File Action View Help eg EI B raus or ws db Update Driver Software Unknown Device How do you want to search for driver software Search automatically for updated driver software Windows will s
4. Combined devices are the multifunctional devices They may contain measuring and control channels of different types AD Converter DA Converter or AD Converter relay switching or AD Converter DA Converter digital input etc QMBox Combined devices consist of a set of functional modules ADC DAC Discrete I O etc installed in a single case These modules can be combined in one device in any configuration comprising one to eight modules This scalable modular architecture allows to e combine all necessary functions in one device e automate small installations requiring only a few measuring channels as well as to create large measuring systems for hundreds of channels 2 Architecture Depending on the number of modules the device can be designed as a 1 2 3 and 8 modular unit 1 module case 2 modules case 3 modules case 4 to 8 modules crate 140x190x40 mm 140x190x60 mm 140x190x80 mm 260x260x160 mm QMBox Combined Devices User manual Rev 2 1 2 of 30 The two module device ADC DAC is used to demonstrate QMBox internal construction A the assembled device B the same device with the cover removed 1 Bottom shell 2 ADC module 3 DAC module 4 Interface board that controls operation of the modules and ensures connection of the device to the computer via USB 5 Interconnect board that ensures electric connection of the modules to the interface board Inside the case the mod
5. Rev 2 1 30 of 30
6. al sources are connected to the device it is advisable that their common wires connect at one point only on the AGND pin of the input port This will eliminate formation of ground loops that are a source of extra noise On the scheme there are the examples of the correct connection of 1 phase and 2 phase differential signal sources to the module Note that even single phase signal sources should be connected to a differential input with three wires The single phase signal The differential signal sources sources QMBox Combined Devices User manual Rev 2 1 15 of 30 5 QMS45 DAC Module QMS45 is a multichannel DAC module with 8 independent opto isolated analog outputs e DAC resolution 16 bits e Output signal range 10 V e Ultra low glitch impulse e Galvanic isolation of analog outputs from USB e Stream output mode allows to generate non periodic signals of arbitrary form and duration 5 3 1 Specifications Number of output 8 channels DAC resolution 16 bits Aggregate throughput 1 MS s all channels Conversion rate one 125 kS s channel Max differential 1 5 LSB nonlinearity Output voltage settling time to 0 0015 of 2 us full scale Typical THD Noise 83 dB Reference limiting error 0 05 96 Max output impedance 0 002 O Max output current 30 mA per channel Galvanic isolation of analog outputs from 1 kV USB If QMBox device contains 2 or more QMS45 modules only one of them can opera
7. ampling rate one channel 0 4 MS s e Four input signal ranges 10 V 2 5 V 0 625 V 0 156 V programmable per channel 5 1 1 Specifications Number of input 16 differential 32 single ended channels Input signal range programmable per 10 V 2 5 V 0 625 V 0 156 V channe Max aggregate 0 4 MS s throughput all Max sampling rate 0 4 MS s fomectamey e Sensitivity 0 7 mV PF MEME Typical common mode rejection ratio input 5 dB signal 5 V 10 kHz Typical crosstalk for input signal 10 kHz with channel switching 83 dB frequency 100 kHz at input ranges 10 V 2 5 V 0 625 V Input overvoltage protection Permanent overvoltage 10 415 V Sec Impulse 1 ms 50 V QMBox Combined Devices User manual Rev 2 1 6 of 30 Figures below show typical characteristics of a QMS10 module Harmonic distortion noise in the 2 fapc band the graph of Crosstalk dependency towards channel switching frequency Mh cuti ida iuc ulli NIU xh fl th tf Atha deta te Waal SEIEN AAA MR AUN folc a PG LP A Oa d Harmonic distortion Input signal sine wave 10 kHz 3V fapc 400 kHz QMBox Combined Devices User manual Rev 2 1 7 of 30 Crosstalk dB 0 100 200 300 400 Frequencies of channel switching kHz Crosstalk dependency towards channel switching frequency QMBox Combined Devices User manual Rev 2 1 8 of 30
8. e Thus circuit of high current through signal wires which reduces measurement accuracy is eliminated 3 When several signal sources are connected to the device it is advisable that their common wires connect at one point only on the AGND pin of the input port This will eliminate formation of ground loops that are a source of extra noise 4 The unused analog inputs should be grounded i e just to be connected with AGND pins of the input port Unused digital inputs could be left disconnected See Synchronization modes Allowable potential on the SYN input is 0 3 5 V relative to the ground contacts 11 28 Analog ground is connected to USB ground inside the device QMBox Combined Devices User manual Rev 2 1 9 of 30 On the scheme there are the examples of the correct connection of 1 phase and 2 phase differential signal sources to the device Note that even single phase signal sources should be connected to a differential input with three wires The single phase signal The differential signal sources sources Differential connection of a signal source reduces the level of common mode noise Besides differential inputs allow connecting signal sources so that currents of signal circuits do not flow through a single wire which increases measurement accuracy Single ended input mode permits doubling the number of channels when the use of differential inputs is not required On the scheme there is the example of t
9. e board to the computer via USB In the PC the data is put to a circular buffer in RAM During the buffer filling the data is taken from it by the application software for further processing visualization and saving to the hard disk Since the software takes data from the buffer at a rate higher than the rate of its receipt from the device the data transfer session can last for however long and data from the device is received by the computer without gaps Thus the device can be used as a full fledged data recorder without record time limits Output modules DAC modules can operate in stream mode too This mode allows to generate non periodic signals of arbitrary form and duration and to play files of arbitrary length through the DAC In this mode the data in the internal buffer of the DAC module updates permanently from the PC RAM The data transfer session can last for however long and data from the PC RAM passes through the DAC without gaps QMBox Combined Devices User manual Rev 2 1 4 of 30 4 Synchronization modes All the modules installed in the device are clocked by the same generator on the interface board That is why in the course of work the modules of the device are precisely synchronised with each other However sometimes it is necessary not only to synchronize the modules with each other but to precisely time the entire device to be started by a certain external event By default the device starts working i e
10. earch your computer and the Internet for the latest driver software for your device unless you ve disabled this feature in your device installation settings Browse my computer for driver software Locate and install driver software manually You should select Browse my computer for driver software and specify the DRV folder on the included CD as the location of the driver Then you should follow the instructions of the Wizard Once the driver is successfully installed the RT USB30K QMSystem Crate Controller USB device should appear in the Device Manager gt 13 Ports COM amp LPT p n Processors 4 4 R TechnologyDevices LY RT USB30K QMSystem Crate Controller USB p amp Sound video and game controllers pJi System devices D y Universal Serial Bus controllers This means that the device s Interface board has been identified correctly by the PC the driver is installed and the device is ready to work Afterwards when the QMBox device is connected to another USB port of the PC Windows might once again detect the QMBox device as unknown device In this case you will have to repeat the driver installation procedure as described above QMBox Combined Devices User manual Rev 2 1 27 of 30 6 2 Connection to the object The figure shows the front panel of a QMBox device 2 modules model modules Input Ports Every functional module w
11. ecscuuecessuecsceuseseseeceesueecessneseesness 20 IId E EIE AES EE E E EE EAA O EAA E E EE A 20 Ded Connec LO TV abi os steep cts a cin inde cg tacts ess ute nhc sce ga nage Sasso pended biecdeeeadebe 21 5 6 S SERIES AG SUB MOD UE liraina EEEE E 22 5 6 1 S20 current IHEGSUTCINONE RIPE EET EET EET 23 5 6 2 530 voltage NCO CII 23 5 6 3 S40 thermocouples Ante TOPAllOH soraa e E S E EE S E E 24 5 6 4 STE APO AE ERI ICI eaii TIT E OD T 24 G CONNEC ION OF THE DEVIC B icenietiereset esce cavessetavecesecescsussssc ceases U1U Uo VITE Ue uud denas UY v9a 02 FoVN E eI TEE Ta CR RETE ETE eT PATH a a Ia 25 6 1 CONNECTING THE DEVICE TO THE PC FOR THE FIRST TIME eese n nnn nnnnn nenne ness s nnns nnn rrr nnn n nennen nns 26 6 2 OO 051 164 TONTO THE ODID 6l pr 28 Ws VOLTAS RE arcsec ase cece cess teas a 29 7 1 ATP ERSCHEINEN NAN NAN AN NNN 29 A SOFTWARE DEVELOPMENT I TT oii E E EEEN E EA EEN EE a cae 30 Contacts http www R Technology ru Info R Technology ru Common questions sales R Technology ru Sales department Support R Technology ru Technical support 1 General information The QMBox series devices are designed for automation of measurement and control units used for vast spectrum of tasks including laboratory research and industry automation QMBox series includes sensor interrogation devices various A D and D A converters and discrete I O devices QMBox
12. er from an external supply included in the delivery set The procedure of connecting the QMBox series devices is as follows 1 Connect the power supply from the delivery set of the device to the Power Supply Port of the device 2 Connect the power supply from the delivery set of the device to AC network 3 Connect the device to the PC via a USB cable At this the Link LED should turn on When the device is connected for the first time driver installation might be required For further information see Connecting the device to the PC for the first time 4 Connect the signal sources to the device see Connecting to the object The procedure of disconnecting the the QMBox series devices is as follows 1 Disconnect the object signal sources from the device 2 Disconnect the device from the PC 3 Disconnect the power supply from the AC network 4 Disconnect the power supply from the device QMBox Combined Devices User manual Rev 2 1 25 of 30 6 1 Connecting the device to the PC for the first time When the QMBox series device is connected to a Windows PC for the first time it is necessary to specify the location of the device driver Before connecting the device to the PC for the first time you should first insert the included CD into the CD ROM drive of your PC and only then connect the device to the PC via a USB cable As a rule having detected a new device Windows starts the Found New Hardware Wizard In this
13. erate with maximum rate 3 Ms s per module and other modules of device must operate with rate not exceeding 10 3 3 1 MS s QMBox Combined Devices User manual Rev 2 1 11 of 30 Figures below show typical characteristics of a QMS20 module Harmonic distortion noise in the 1 fapc band the graph of Crosstalk dependency towards channel switching frequency Lil MIT HANI i Fw b Hl Ll il BU Noise in the fapc band fapc 3MHz Harmonic distortion Input signal sine wave 10 kHz 5V fanc 3MHz QMBox Combined Devices User manual Rev 2 1 12 of 30 Crosstalk dB 7 0 1 2 Frequencies of channel switching MHz C3 Crosstalk dependency towards channel switching frequency QMBox Combined Devices User manual Rev 2 1 13 of 30 5 2 2 Connecting to the object The input port of the QMS20 module is described in the table where Xn non inverting and Yn inverting inputs of the differential channel n NC the pin is reserved analog supply output analog supply output 3 3 V digital supply output 9 28 NC 10 NC 29 AGND Analog ground 11 AGND Analog ground 12 Y8 input Y7 input 14 Y6 input 15 Y5 input Y4 input 35 X3 input Y3 input 8 Y2input YT input LL The analog inputs of the QMS20 module are differential Differential connection of a signal source reduces the level of common mode noise Besides differential inputs allow connecting
14. he correct connection of 1 phase signal sources to the module in single ended mode The single phase signal sources in single ended mode Xn Yn AGND32 AGND QMBox Combined Devices User manual Rev 2 1 10 of 30 5 2 QMS20 ADC Module QMS20 is a multichannel ADC module with 8 differential analog inputs e High max sampling rate one channel 3 MS s e Low input current and input capacitance in any operation mode e ADC resolution 14 bits e Two input signal ranges 5 V 0 99V programmable per channel 5 2 1 Specifications Number of input channels 8 differential Input signal range 5V 0 99 V programmable per channel Max aggregate throughput all 3 MS s channels Max sampling rate one 3 MS s channel ADC resolution 14 bits Sensitivity at input range 5 V 1mV at input range 0 99 V 0 25 mV Reference limiting error 0 05 96 Typical input current in any 0 1 nA operation mode Typical input capacitance in any 25 pF eme mede O B Typical common mode rejection 75 dB Typical crosstalk for input signal 10 kHz with channel 89 dB switching frequency 2 MHz ooe Input overvoltage protection 25 V Permanent overvoltage 10 sec 250 V Impulse 1 ms It should be taken into consideration that the overall rate of all the modules of QMBox device cannot be higher then 10 MS s For example if QMBox device contains 4 or more QMS20 modules only three of them can op
15. hich is a part of the QMBox device has its own input port for the signals connection The input ports for each module type are described in chapter Functional modules used in the QMBox series devices QMBox Combined Devices User manual Rev 2 1 28 of 30 7 Software QMBox software consists of following components e QMLab software suite e Software development kit SDK package 7 1 QMLab software suite The QMLab software suite is a universal software tool for working with QMBox devices It allows performing most standard tasks within measurement automation The QMLab suite allows you to start work immediately after the device is connected acquire process visualize and save the already calibrated data converted to the required measurement units without help of programmers or metrologists The QMLab suite includes e data recorder e oscilloscope e spectrum analyzer e generator of analog signals e primary data processing unit Primary data processing may include calibration averaging normalization in accordance with IEC for a specific type of sensor as well as a more complex mathematical processing For example for thermocouples there is an automatic software compensation of cold junction and linearization of the transfer parameter Obtained data is saved in standard text and binary formats suitable for conventional and specialized data processing programs Excel MathLAB Cool Edit pro etc The generat
16. lay 2 18 19 QMBox Combined Devices User manual Rev 2 1 21 of 30 5 6 S series ADC submodules 6 series submodules are single channel AD Converters designed for measurements with channel to channel galvanic isolation including those for interrogating of remote industrial sensors thermocouples thermistors current loop sensors etc S series common specifications Sampling rate 0 25 kS s per channel ADC resolution 12 bits Galvanic isolation of input channels 1000 V from USB Channel to channel galvanic isolation 500 V S series submodules are installed into slots on QMS301 Carrier module One QMS301 module may carry up to 16 S series ADC of various types and combined in different ways Carrier module QMS301 with four S series submodules installed is shown below QMBox Combined Devices User manual Rev 2 1 22 of 30 5 6 1 S20 current measurement 920 is a single channel S series ADC for current measurement Specifications ADC resolution 12 bits Sampling rate 0 25 kS s Input signal range i 20 mA Custom made versions with the ranges 5 mA 5 mA and 20 mA are available Reference limiting error m 075 5 6 2 S30 voltage measurement S30 is a single channel S series ADC for voltage measurement Specifications ADC resolution 12 bits Sampling rate 0 25 kS s Input signal range 10 V Custom made versions with other ranges including
17. millivolt ones are available Reference limiting error 0 075 QMBox Combined Devices User manual Rev 2 1 23 of 30 5 6 3 S40 thermocouples interrogation S40 is a single channel S series ADC for thermocouples interrogation All types of thermocouples are supported according to IEC 60584 1 Specifications Sensor connection 2 wire Thermocouples type According to IEC 60584 1 including E J K R S T B N L M ADC resolution 12 bits Sampling rate 0 25 kS s Input signal range 25 mV 75 mV Reference limiting error 0 075 5 6 4 S50 resistance measurement S50 is a single channel S series ADC for resistance measurement including thermistors Specifications Sensor connection 2 wire 3 wire 4 wire ADC resolution 12 bits Sampling rate 0 25 kS s Input signal range 0 250 Q Custom made versions with other ranges are available Reference limiting error 0 075 QMBox Combined Devices User manual Rev 2 1 24 of 30 6 Connection of the device The figure shows the rear panel of a QMBox device Link LED A USB Port Power Supply Port Link LED turns on when the device is connected to USB and signals that the USB port of the computer has identified the device correctly USB port type B A standard connector for connecting the device to the PC via USB with an standard USB A B cable Power Supply Port it is used for supplying pow
18. nalog circuits DAC outputs AGND and connected to USB ground inside the device QMBox Combined Devices User manual Rev 2 1 17 of 30 5 4 QMS70 discrete input module QMS70 is a multichannel discrete input module with 16 independent channel to channel isolated inputs e Several input ranges from 5 V to 220 V e Ability to interrogate the signals provided by both DC and AC voltage e High voltage galvanic isolation of inputs 5 kV 5 4 1 Specifications Nominal value of input voltage depending on 5 V 24 V 220 V the version Input signals type AC and DC Minimum value of logical 1 input voltage depending on the version Maximum value of logical 0 input voltage depending on the version Aggregate throughput 4 kS s all channels Sampling rate 0 25 kS s per channel Galvanic isolation of input channels from 5 kV 3 75 kV rms USB Channel to channel 500 V wienn Input overvoltage protection impulse 1 25 V 110 V 1000 V 4 V 20 V 150 V 1 V 5V 25V ms depending on the version Nominal value of input voltage is specified by the customer when ordering Custom made versions with other voltage values are available QMBox Combined Devices User manual Rev 2 1 18 of 30 5 4 2 Connecting to the object The input port of the QMS70 module is described in the table where Xn and Yn inputs of the discrete channel n NC the pin is reserved X16 in
19. or of analog signals included in QMLab software suite supports all QMBox series DAC devices The program allows you to use the DAC as a multichannel generator of sinusoidal signals DC signals as well as signals of arbitrary waveforms by playing through the DAC user s binary files of arbitrary length QMLab software suite is free of charge QMBox Combined Devices User manual Rev 2 1 29 of 30 A detailed description of the QMLab suite is given in the QMLab User Manual document that can be found on the site www RTechElectronics com and on the CD supplied with the device 7 2 ooftware development kit Apart from the complete QMLab software suite the QMBox delivery set includes an SDK package which is software and documentation designed for users who would like to create their own applications for working with the device This software consists of function libraries API and examples of software development The user has a possibility to create full blown applications using just a limited number of library functions These library functions are written so that even an inexperienced programmer who is not well versed in multithreaded and object oriented programming can work with the device A more detailed description of the software development kit is given in the QMBox Programming Guide document that can be found on the site www RTechElectronics com and on the CD supplied with the device QMBox Combined Devices User manual
20. put X15 input X14 input X13 input 5 X12 input 24 Y12 input 6 X11 input X10 input 8 X9 input 9 X8 input X7 input X6 input 12 X5input 31 Y5 input 13 X4 input 32 Y4input 14 X3 input 33 Y3 input Y2 input Y1 input 36 37 X2 input X1 input NC NC NC QMBox Combined Devices User manual Rev 2 1 19 of 30 5 5 QMS75 relay switching module QMS75 is a relay switching module It has 8 independent galvanically isolated relays e High max switching voltage current up to 400 V 5 A per channel e High voltage galvanic isolation of relays 3 kV e Channel to channel galvanic isolation amp S 5 5 1 Specifications Number of relays Relay type Electromagnetic Max switching current 3 A 5 Afor 1 sec Max switching voltage 250 V allowable inductive load switching at overshoot of up to 400 V Galvanic isolation of relay channels from 3 kV USB Channel to channel 750 V galvanic isolation QMBox Combined Devices User manual Rev 2 1 20 of 30 5 5 2 Connecting to the object Default contact configuration after power on of each relay Description 18 K3 Relay 2 K3 Relay 1 i NG ML 1 K1 Relay 7 20 K1 Relay 8 K2 Relay 7 K3 Relay 7 K1 Relay 6 K2 Relay 6 6 K3 Relay 6 K1 Relay 5 8 K2 Relay 5 9 K3 Relay 5 K1 Relay 4 K2 Relay 4 K3 Relay 4 K1 Relay 3 K2 Relay 3 K3 Relay 3 K1 Relay 2 K2 Re
21. signal sources so that currents of signal circuits do not flow through a single wire which increases measurement accuracy Z Z Z zz z O O O O O OJ O O lt lt Z NIO CO The correct connection of the sources of analog signal is the most important condition of the correct operation of acquisition system which allows to avoid a lot of problems during the device operation During the connection of the sources of analog signal to the module it is necessary to keep to the following recommendations 1 Differential connection presupposes measuring voltage difference between the inverting and non inverting inputs of the channel i e differential voltage However it is necessary to remember that the voltage in relation to the analog ground of the device on both inputs common mode voltage should not be higher than the acceptable input signal range 2 Correct connection of a signal to the differential input is always a three wire connection It is necessary to separate signal wires connected to a high impedance input from the common ground wire Thus circuit of high current through signal wires which reduces measurement accuracy is eliminated See Synchronization modes Allowable potential on the SYN input is 0 3 5 V relative to the ground contacts 11 28 Analog ground is connected to USB ground inside the device QMBox Combined Devices User manual Rev 2 1 14 of 30 3 When several sign
22. starts the data transfer session since after issuing the command Start from a PC This command can be executed within a few milliseconds The exact execution time of this command under OS Windows that is not a real time OS is impossible to be learnt in advance For the cases when it is necessary to bind the start of the data transfer session to any external event with high precision one can use the external start synchronization mode In this mode it is necessary to give a negative digital pulse logical 1 O 1 to the SYN contact of the device after the issuing the Start command The data transfer session begins right after negative pulse edge logical 1 to 0 arrives The duration of the SYN pulse i e of the logic 0 must be at least 50 ns The SYN line has an internal pull up resistor so one can just short the SYN line to ground to generate the required pulse owitching between start synchronization modes of data acquisition is software selectable QMBox Combined Devices User manual Rev 2 1 5 of 30 5 Functional modules used in the QMBox series devices QMBox Combined devices consist of a set of functional modules ADC DAC Discrete I O etc installed in a single case These modules can be combined in one device in any configuration comprising one to eight modules Sch QMS10 ADC Module QMS10 is a multichannel ADC module with 16 differential 32 single ended analog inputs e Max s
23. te in stream output mode Other DAC modules of the device can operate in oscillator mode only In oscillator mode the module sends the contents of its internal buffer the buffer size is 32 kSamples per channel cyclically through the DAC without updating of the output data from PC This mode is suitable for generating simple periodic signals and DC signals Output current lt 10 mA Output current lt 10 mA QMBox Combined Devices User manual Rev 2 1 16 of 30 5 3 2 Connecting to the object The port of the QMS45 module is described in the table where where DACi and DACi are the outputs of i channel of the DAC in a standard variant of the module delivery DACi is connected inside the module to analog ground AGND z o pL o DACT output 2 AGND Analog ground AGND Analog ground DAC2 output AGND Analog ground DACS output 6 AGND Analog ground DAC4 output 8 AGND Analog ground AGND Analog ground DACS output 10 AGND Analog ground AGND Analog ground DACE output AGND Analog ground DAC7 output AGND Analog ground DACB output AGND Analog ground AGND Analog ground 15 V analog supply output 8 18 15 V analog supply output DGND Digital ground 19 SYN synchronization input See Synchronization modes Allowable potential on the SYN input is 0 3 5 V relative to the Digital ground contact 37 Note Digital ground is galvanically isolated from the a
24. ules are plugged into the slots of the interconnect board This board joins the modules into a single device and ensures electric connection of the modules to the interface USB board The interface board controls operation of the modules and ensures connection of the device to the PC via USB QMBox Combined Devices User manual Rev 2 1 3 of 30 3 Principle of operation The QMBox series devices operate under PC control OS Windows via USB connection The software supplied with QMBox devices performs stream input output of data between the device and the PC memory data processing and further visualization on the display as well as saving to the PC hard disk QMBox hardware Object Control signals Sensor signals QMBox devices consist of a set of functional modules ADC DAC Discrete I O etc installed in a single case Depending on data transfer direction all the QMBox modules can be subdivided into input modules ADC and discrete input modules and output modules DAC modules Before starting work the configuration is performed by means of the software the operation parameters of the modules of the device are set sampling rate the number of channels in use etc After this the device is started i e the data transfer session is launched During the data transfer session the input modules of the device ADC modules for example digitize input signals at a preset rate and send the data through the interfac
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