SIGMATEK C-DIAS Technical Data Manual

C-DIAS ANALOG INPUT MODULE CAI 042

C-DIAS Analog Input Module CAI 042

4 x resistance

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 1,2 or 4
Load cells parameter 2mV / V
Measurement range ±20 mV
Measurement value ±105000 d
Resolution Internal 24 bit

Conversion time for all channels 14ms / 4 Channel drive

Bridge supply voltage 10V
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

measurement bridges ±2mV / V

(From the 18 bit measurement value)

8ms / 2 Channel drive
4ms / 1 Channel drive

135mA

300Ohm to 5000Ohm

75Ohm to 5000Ohm

±0,01% of maximum measurement value

(With an operating temperature from 0 to +40°C)

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C-DIAS ANALOG INPUT MODULE CAI 042

Number of filters per channel 2 (1 fix, 2. 4-step settable)
Calibratable Yes
Serial interface Analysis with hyper terminal possible

So that the maximum load for the reference voltage is not exceeded, a maximum of 4

bridges with a minimum resistance of 300Ohms can be connected to the CAI 042.

Here, it doesn’t matter if 4 bridges are connected parallel with one channel or if each

channel is connected to a single bridge.

Afin de ne pas dépasser la charge maximale de la 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)

100000

80000

60000

40000

Filterausgang [dezimal]

Filter 2-1
Filter 2-2

20000

0

0 10203040506070809010

Samples [n]

Filter 2-3
Filter 2-4
Filter 1

0

Electrical Requirements

Supply from C-DIAS Bus +5V and +24V
Current consumption of the

C-DIAS Bus (+5 V supply)
Current consumption of the

C-DIAS Bus (+24 V-supply)

Typically 50mA Maximum 70mA

Typically 200mA Maximum 250mA

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C-DIAS ANALOG INPUT MODULE CAI 042

IMPORTANT:

This module exceeds the standard current consumption for C-DIAS modules!

(+5V: 150mA and +24V: 150mA)

If this C-DIAS module is mounted on an 8x module carrier (CMB 08x), the total current of

the modules used must be determined and tested.

The specification for the current consumption is found in the technical document of the

respective module under “Electrical Requirements”

The total current of the +5V supply cannot exceed 1.2A (150mA/slot).

This also applies to the total current of the +24V supply, which also cannot exceed

1.2A (150mA/slot).

IMPORTANT:

La consommation de courant de ce module dépasse les valeurs typiques pour les modules

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 (150mA/module).

Cela vaut également pour le courant total de l'alimentation +24 V, lequel ne peut également

pas dépasser 1,2A (150mA/module).

Miscellaneous

Article number 12-009-042
Hardware version 1.x
Standardization UL (E247993)

Environmental conditions

Storage temperature -20 – +85°C
Operating temperature 0 – +40°C
Humidity 0 – 95%, uncondensed
EMV stability Per EN 61000-6-2 (Industrial area)
Shock resistance EN 60068-2-27 150m/s²
Protection type EN 60529 IP 20

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C-DIAS ANALOG INPUT MODULE CAI 042

Mechanical Dimensions

109,2

104,10 (Measurement incl. Cover)

129

24,90

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C-DIAS ANALOG INPUT MODULE CAI 042

Terminal Assignment

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C-DIAS ANALOG INPUT MODULE CAI 042

X1: Measurement bridge 1

Pin Function

1 Signal input 1­2 Signal input 1+
3 Reference Input 1­4 Reference Input 1+
5 Reference Output 1- (GND)
6 Reference Output 1+
7 Reference Output 1- (GND)
8 Reference Output 1+
9 Earth connection 1 (shield)

10 Earth connection 1 (Shield)

X2: Measurement bridge 2

X3: Measurement bridge 3

Pin Function

1 Signal input 2­2 Signal input 2+
3 Reference Input 2­4 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)

Pin Function

1 Signal input 3­2 Signal input 3+
3 Reference Input 3­4 Reference Input 3+
5 Reference Output 3- (GND)
6 Reference Output 3+
7 Reference Output 3- (GND)
8 Reference Output 3+
9 Earth connection 3 (Shield)

10 Earth connection 3 (Shield)

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C-DIAS ANALOG INPUT MODULE CAI 042

X4: Measurement bridge 4

Pin Function

1 Signal input 4­2 Signal input 4+
3 Reference Input 4­4 Reference Input 4+
5 Reference Output 4- (GND)
6 Reference Output 4+
7 Reference Output 4- (GND)
8 Reference Output 4+
9 Earth connection 4 (Shield)

10 Earth connection 4 (Shield)

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 terminals is available from

SIGMATEK under the article number 12-600-045

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