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C-DIAS ANALOG INPUT MODULE

CAI 042

Wiring Variations

There are two connection types available for measuring with the resistive wire strain:

•

4-wire measurement: The advantage of this variation is that a four-pole connection
cable can be used for the DMS; however, the voltage drop on the circuit for the
bridge supply voltage cannot be compensated.

R

Line

Measuring

Bridge

R

Line

Shielding

Weidmüller

Plug

Jumper

•

6-wire measurement: This method has the advantage of voltage compensation
through direct measurement of the bridge supply voltage on the DMS.

DMS-Measuring

Bridge

R

Line

R

Line

Shielding

Weidmüller

Plug

Page 10

02.08.2011

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Содержание C-DIAS

Страница 1: ...cells parameter 2mV V Measurement range 20 mV Measurement value 105000 d Resolution Internal 24 bit From the 18 bit measurement value Conversion time for all channels 14ms 4 Channel drive 8ms 2 Channel drive 4ms 1 Channel drive Bridge supply voltage 10V Maximum load of the voltage supply entire supply 135mA Maximum resistance per channel using all 4 channels 300Ohm to 5000Ohm Allowable resistance ...

Страница 2: ... tension de référence au maximum 4 ponts d une résistance supérieure ou égale à 300 ohms peuvent être connectés à la CAI 042 Il est sans importance si quatre ponts sont connectés en parallèle avec un canal ou si chaque canal est connecté à un seul pont Step response of the analog and digital filters 20mV steps 0 20000 40000 60000 80000 100000 0 10 20 30 40 50 60 70 80 90 10 Samples n Filterausgang...

Страница 3: ...ules C DIAS 5 V 150 mA et 24 V 150mA Si ce module C DIAS est monté sur un fond de panier de taille 8 CMB 08x le courant total des modules utilisés doit être déterminé et vérifié Les données de la consommation de courant sont mentionnées dans la documentation technique du module respectif dans le paragraphe Spécifications électriques Le courant total de l alimentation 5 V ne peut pas dépasser 1 2A ...

Страница 4: ...C DIAS ANALOG INPUT MODULE CAI 042 Mechanical Dimensions 104 10 Measurement incl Cover 129 109 2 24 90 Page 4 02 08 2011 ...

Страница 5: ...C DIAS ANALOG INPUT MODULE CAI 042 Terminal Assignment 02 08 2011 Page 5c ...

Страница 6: ...Measurement bridge 2 Pin Function 1 Signal input 2 2 Signal input 2 3 Reference Input 2 4 Reference Input 2 5 Reference Output 2 GND 6 Reference Output 2 7 Reference Output 2 GND 8 Reference Output 2 9 Earth connection 2 Shield 10 Earth connection 2 Shield X3 Measurement bridge 3 Pin Function 1 Signal input 3 2 Signal input 3 3 Reference Input 3 4 Reference Input 3 5 Reference Output 3 GND 6 Refer...

Страница 7: ...hield X5 Serial interface Pin Function 1 5 V 2 Rx TTL 3 Tx TTL 4 5 GND 6 The signals of the serial interfaces are TTL signals To connect the serial interface to a RS232 interface a TTL RS232 converter is necessary Applicable Connector X1 X4 10 pin Weidmüller connector B2L3 5 10 X5 6 pin socket board RM2 54 not included in connector set CKL 042 The complete C DIAS connector set CKL 045 with spring ...

Страница 8: ...C DIAS ANALOG INPUT MODULE CAI 042 Status Display LED Nr LED color Description 1 Green Output 1 DC OK 2 Green Output 2 DATA Page 8 02 08 2011 ...

Страница 9: ...d Cable Shielding The analog signals received by the module are very small in comparison to the digital signals To ensure error free operation a careful wiring method should be followed The analog connection lines must be as short as possible and avoid parallel wiring with digital signal lines The signal lines should be shielded or at the very least twisted see below 02 08 2011 Page 9 ...

Страница 10: ...connection cable can be used for the DMS however the voltage drop on the circuit for the bridge supply voltage cannot be compensated RLine Measuring Bridge RLine Shielding Weidmüller Plug Jumper 6 wire measurement This method has the advantage of voltage compensation through direct measurement of the bridge supply voltage on the DMS DMS Measuring Bridge RLine RLine Shielding Weidmüller Plug Page 1...

Страница 11: ...ne Counter Shows how often measuring values are written to the serial interface The measuring values are updated in about 13ms intervals After each reset the counter reading is reset Filter 1 This value corresponds to the filtered measurement value of the voltage on the resistor measuring bridge with 18 bit resolution Filter frequency fg fSamp 96 02 08 2011 Page 11 ...

Страница 12: ...oltage on the resistor measuring bridge with 18 bit resolution Filter frequency fg fSamp x x 8 16 32 64 The setting of the filter frequency for filter 2 takes place with the configuration register of the respective channel The description of the configuration register can be found under Configuration register for Channel x CFGRx ...

Страница 13: ...l EEProm LASAL EEProm can be read Status instruction and configuration registers These registers can be addressed directly Data registers To avoid bus conflicts between the controller and C DIAS bus with 32 bit data transfers the data are stored in 2 pages A flag in STATUSR always points to the page with the most current values Process for Reading Data from the C DIAS Bus The control reads the PAG...

Страница 14: ... Diagram of Communication over the C DIAS bus Data is read from PAGE0 Data register PAGE0 Data register PAGE1 µC of CAI042 C DIAS 0 PAGE Bit in STATUSR control reads from PAGE0 Module writes to PAGE1 Control reads Page indentification Page 14 02 08 2011 ...

Страница 15: ...MODULE CAI 042 Data is read from PAGE1 Data register PAGE0 Data register PAGE1 µC der CAI042 C DIAS 1 PAGE Bit in STATUSR Control reads from PAGE1 Module writes to PAGE0 Control reads Page identification 02 08 2011 Page 15 ...

Страница 16: ...filter output 2 Channel1 Page 0 0x24 0x27 DATA2_P0_F1 Data for filter output 1 Channel2 Page 0 0x28 0x2B DATA2_P0_F2 Data for filter output 2 Channel2 Page 0 0x2C 0x2F DATA3_P0_F1 Data for filter output 1 Channel3 Page 0 0x30 0x33 DATA3_P0_F2 Data for filter output 2 Channel3 Page 0 0x34 0x37 DATA4_P0_F1 Data for filter output 1 Channel4 Page 0 0x38 0x3B DATA4_P0_F2 Data for filter output 2 Channe...

Страница 17: ...n error has occurred The error register should be checked BIT 0 PAGE Page If this bit is cleared the last valid data is stored in the address range 0x20 to 0x3F If it is set the last valid data is stored in the address range 0x40 to 0x5F This flag is valid only in connection with the RDY bit Mode bits table MOD3 MOD2 MOD1 MOD0 Description 0 0 0 0 Warm up phase The module is in the warm up phase Th...

Страница 18: ...onfigurations Global Configurations Register CFG Bit 7 6 5 4 3 2 1 0 CFG CHAN1 CHAN0 R W R W R W R W R W R W R W R W R W Initial Value 0 0 0 0 0 0 0 0 Global Configuration of CAI042 BIT1 CHAN1 Channel configuration bit BIT0 CHAN0 Channel configuration bit With the CHAN1 CHAN0 bits it is possible to select 1 2 and 4 channel operation The conversion time changes according to the settings CHAN1 CHAN0...

Страница 19: ...5 8 Subversion number binary VER 24 16 Main version number binary Example VER2 VER1 VER0 Version 1 9 14 V01 09 14 Configuration register for Channel x CFGRx Bit 7 6 5 4 3 2 1 0 CFGRx EN FIL1 FIL0 R W Initial Value 1 0 0 0 0 0 0 0 x 1 4 BIT7 EN Enable The channel is active when this bit is set and inactive when cleared BIT1 FIL1 Filter selection for filter 2 See filter table BIT0 FIL0 Filter select...

Страница 20: ...x SRx Bit 7 6 5 4 3 2 1 0 SRx SIGOF R W R R R Initial Value 0 0 0 0 0 0 0 0 x 1 4 BIT 0 SIGOV Signal Overflow If this bit is set the measured value of the input signal is too high When cleared the measured value is within range Data Register DATAx_Py Bit 7 6 5 4 3 2 1 0 DATAx_Py_Fz DATAx_Py_Fz 7 0 DATAx_Py_Fz DATAx_Py_Fz 15 8 DATAx_Py_Fz DATAx_Py_Fz 23 16 DATAx_Py_Fz DATAx_Py_Fz 31 24 R W R R R R ...

Страница 21: ...42 12345 Identification 44 9 Length of the following data block in WORD 46 4 Number of channels 48 57 xxxxxx Serial number as 16 byte string E G 31333_01_0019___ 58 AF 0 FILL B0 B3 xxx Head1 CalibrateCounter B4 B7 xxx Head1 ZeroLevel B8 BB xxx Head1 CalibrateLevel BC BF xxx Head1 CalibrateWeight C0 C3 xxx Head1 MaxWeight C4 D7 xxx Head2 partitioned the same as Head1 D8 EB xxx Head3 partitioned the...

Страница 22: ...C DIAS ANALOG INPUT MODULE CAI 042 Page 22 02 08 2011 ...

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