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SIGMATEK C-DIAS Technical Data Manual

4 x resistance measurement bridges ±2mv / v
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C-DIAS Analog Input Module
4 x resistance
measurement
The calibratable CAI 042 DMS module is used to record data
from resistance measurement bridges (e.g. load cells). With an
18-bit resolution, measurement values with an accuracy of
±0,01% are available.
Technical Data
Analog Channel Specifications
Number of channels
Load cells parameter
Measurement range
Measurement value
Resolution
Conversion time for all channels
Bridge supply voltage
Maximum load of the voltage
supply (entire supply)
Maximum resistance per channel
(using all 4 channels)
Allowable resistance (parallel
circuit of all 4 bridges)
Analog channel measurement
accuracy
02.08.2011
C-DIAS ANALOG INPUT MODULE
bridges ±2mV / V
(From the 18 bit measurement value)
±0,01% of maximum measurement value
(With an operating temperature from 0 to +40°C)
1,2 or 4
2mV / V
±20 mV
±105000 d
Internal 24 bit
14ms / 4 Channel drive
8ms / 2 Channel drive
4ms / 1 Channel drive
10V
135mA
300Ohm to 5000Ohm
75Ohm to 5000Ohm
CAI 042
CAI 042
Page 1 c

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Summary of Contents for SIGMATEK C-DIAS

  • Page 1 C-DIAS ANALOG INPUT MODULE CAI 042 C-DIAS Analog Input Module CAI 042 4 x resistance bridges ±2mV / V measurement The calibratable CAI 042 DMS module is used to record data from resistance measurement bridges (e.g. load cells). With an 18-bit resolution, measurement values with an accuracy of ±0,01% are available.
  • Page 2 Filter 1 Samples [n] Electrical Requirements Supply from C-DIAS Bus +5V and +24V Current consumption of the Typically 50mA Maximum 70mA C-DIAS Bus (+5 V supply) Current consumption of the Typically 200mA Maximum 250mA C-DIAS Bus (+24 V-supply) Page 2 02.08.2011...
  • Page 3 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"...

  • Page 4: Mechanical Dimensions

    C-DIAS ANALOG INPUT MODULE CAI 042 Mechanical Dimensions 24,90 Page 4 02.08.2011...

  • Page 5: Terminal Assignment

    C-DIAS ANALOG INPUT MODULE CAI 042 Terminal Assignment 02.08.2011 Page 5 c...
  • Page 6 C-DIAS ANALOG INPUT MODULE CAI 042 X1: Measurement bridge 1 Function Signal input 1- Signal input 1+ Reference Input 1- Reference Input 1+ Reference Output 1- (GND) Reference Output 1+ Reference Output 1- (GND) Reference Output 1+ Earth connection 1 (shield)
  • Page 7 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 terminals is available from SIGMATEK under the article number 12-600-045 02.08.2011...

  • Page 8: Status Display

    C-DIAS ANALOG INPUT MODULE CAI 042 Status Display LED Nr. LED color Description Green Output 1 DC OK Green Output 2 DATA Page 8 02.08.2011...

  • Page 9: Wiring Guidelines

    C-DIAS ANALOG INPUT MODULE CAI 042 Wiring Guidelines General The 0V connection for the voltage supply must be wired to the 0V collection point over the shortest route possible. Wiring and Cable Shielding The analog signals received by the module are very small in comparison to the digital signals.

  • Page 10: Wiring Variations

    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.

  • Page 11: Analysis Of The Serial Interface With Hyper Terminal

    C-DIAS ANALOG INPUT MODULE CAI 042 Analysis of the serial interface with Hyper terminal Settings: Baud rate: 115,2k Data bits: Parity: None Stop bits: Flow control: None Counter: Shows how often measuring values are written to the serial interface. The measuring values are updated in about 13ms intervals.
  • Page 12 C-DIAS ANALOG INPUT MODULE CAI 042 Filter 2: This value corresponds to the filtered measurement value of the voltage on the resistor measuring bridge with 18-bit resolution. Filter frequency: f / x; x … [8, 16, 32, 64] Samp The setting of the filter frequency for filter 2 takes place with the configuration register of the respective channel.
  • Page 13 C-DIAS ANALOG INPUT MODULE CAI 042 Communication (CDIAS) Over the C-DIAS bus, the operating parameters and data can be read and written. Up to 256, 8-bit addresses can be accessed. The data transfer is divided it two register groups. •...

  • Page 14: Schematic Process Diagram Of Communication Over The C-Dias Bus

    C-DIAS ANALOG INPUT MODULE CAI 042 Schematic Process Diagram of Communication over the C-DIAS bus Data is read from PAGE0 Control reads Page indentification PAGE Bit in STATUSR control reads Data register from PAGE0 µC of PAGE0 C-DIAS CAI042 Data register...
  • Page 15 C-DIAS ANALOG INPUT MODULE CAI 042 Data is read from PAGE1 Control reads Page identification PAGE Bit in STATUSR Module writes Data register to PAGE0 µC der PAGE0 C-DIAS CAI042 Control reads Data register from PAGE1 PAGE1 02.08.2011 Page 15...

  • Page 16: Registers Used In Communication Over The C-Dias Bus

    C-DIAS ANALOG INPUT MODULE CAI 042 Registers used in Communication over the C-Dias bus Register overview Register Description Address STATUSR Module status (error messages, operating status) 0x00 CMDR Instruction register (operating mode settings) 0x01 Global configurations register 0x02 Firmware version 0x04 –...

  • Page 17: Status Register - Statusr

    C-DIAS ANALOG INPUT MODULE CAI 042 Status Register – STATUSR STAUSR MOD3 MOD2 MOD1 MOD0 PAGE Initial Value • BIT 7 – MOD3: Modus Bit 3 See Mode bits table. • BIT 6 – MOD2: Modus Bit 2 See Mode bits table.

  • Page 18: Instruction Register - Cmdr

    C-DIAS ANALOG INPUT MODULE CAI 042 Instruction Register - CMDR CMDR CMDR[7..0] Initial Value Instruction register for controlling the module. The module is set to 0 after this instruction is executed. Table of instructions Value Instruction 0x01 Normal operation (Skip warm-up phase)

  • Page 19: Ver -Version Register

    C-DIAS ANALOG INPUT MODULE CAI 042 VER –Version register VER0 VER[7..0] VER1 VER[15..8] VER2 VER[23..16] Version number of the Firmware: • VER[7..0] Revision number (binary) • VER[15..8] Subversion number (binary) • VER[24..16] Main version number (binary) Example: VER2 VER1 VER0 Version V01.09.14...

  • Page 20: Filter Table

    C-DIAS ANALOG INPUT MODULE CAI 042 Filter table FIL1 FIL0 Filter frequency for Filter 2 Filter 2-1 Samp / 16 Filter 2-2 Samp / 32 Filter 2-3 Samp / 64 Filter 2-4 Samp Filter 1 (fixed value filter) has a filter frequency of / 96.

  • Page 21: Lasal Eeprom Data

    C-DIAS ANALOG INPUT MODULE CAI 042 LASAL EEProm Data Calibration data CAI042 (24C02 is organized by byte): Address Data Description Check sum Identification Module group 5=CAI Module version 4=CAI042 Number of channels Hardware version $10=HW 1.0 $06-$3F FILL Serial number...
  • Page 22 C-DIAS ANALOG INPUT MODULE CAI 042 Page 22 02.08.2011...

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