SIGMA TEK C-DIAS Series User manual

C-DIAS TEMPERATURE SENSING MODULE CAI 888
19.04.2012 Page 1
C-DIAS Temperature Sensing Module CAI 888
8 x Thermocouple inputs
8 x digital outputs+24 V
This analog input module is used for the recording of
temperatures.
The following thermocouple inputs can be connected:
Fe-CuNi (Type J) ... 0 – 600 °C
NiCr-Ni (Type K) ... 0 – 800 °C
FeCu-Ni (Type L) … 0 – 600 °C
In addition, 8 digital +24 V outputs (positive switching) are
available. The supply voltage is monitored for under voltage.
Technical Data
Analog channel specifications
Number of channels 8
Measurement range Type J (0 - 600 °C; 0 – 33.1 mV)
Type K (0 - 800 °C; 0 – 33.3 mV)
Type L (0 - 600 °C; 0 – 33.7 mV)
Measurement value 0 – 6000 or
0 – 8000 An open input returns a value of - 2147483631
Resolution 0.15 °C / 12 Bits
Conversion time per channel 1 ms
Applicable sensor type
according to
DIN 43710
FeCu-Ni (Type J)
NiCr-Ni (Typ K)
FeCu-Ni (Typ L)
Input filter 0.5 s Low pass 3 system
Common mode range ±10 V
Sensor type for cold junction KTY10-62
Cold junction -20 to 80 °C
Precision of Analog channel
measurement ±0.70 % of the maximum measurement value (with use of KTY10-62 terminal compensation sensors)

CAI 888 C-DIAS TEMPERATURE SENSING MODULE
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Frequency Curve
Measurement error due to an internal sensor resistance error
Measurement error due to an internal sensor resistance
Resistance (Ohm)
Error (ppm)

C-DIAS TEMPERATURE SENSING MODULE CAI 888
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Digital Outputs
Number of outputs 8
Short-circuit proof Yes
Maximum continuous current per
channel allowed 0.5 A
Maximum total current 4 A (100% of on-time)
Voltage drop over power supply
(output active) ≤0.16 V
Residual current (inactive) ≤10 µA
Turn-on delay ≤100 µs
Turn-off delay ≤150 µs
Max. Braking energy per output 1 J
Electrical requirements
Supply voltage of the digital
outputs (X6) 18 – 30 V DC
Current consumption of the digital
output supply (X6) Corresponds to the load on the digital outputs plus 45 mA
Voltage supply from C-DIAS bus +5 V and +24 V
Current consumption on DIAS bus
(+5 V supply) Typically70 mA Maximum 90 mA
Current consumption of C-DIAS
bus (+24 V supply) Typically30 mA Maximum 40 mA
Miscellaneous
Article number 12-009-888
Hardware version 2.x
a

CAI 888 C-DIAS TEMPERATURE SENSING MODULE
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Environmental conditions
Storage temperature -20 – +85 °C
Operating temperature 0 – +60 °C
Humidity 0 - 95 %, uncondensed
EMV stability According to EN 61000-6-2 (industrial area)
EMV noise emission According to EN 61000-6-4 (industrial area)
Shock resistance EN 60068-2-27 150 m/s²
Protection Type EN 60529 IP 20

C-DIAS TEMPERATURE SENSING MODULE CAI 888
19.04.2012 Page 5
Mechanical Dimensions
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24.90

CAI 888 C-DIAS TEMPERATURE SENSING MODULE
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Connector Layout

C-DIAS TEMPERATURE SENSING MODULE CAI 888
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X1: Temperature input plug 1 - 3
X2: Temperature input plug 4 - 6
X3: Temperature input plug 7 – 8, temperature compensation
Pin Function
1 Temperature input 1-
2 Temperature input 1+
3 Temperature input 2-
4 Temperature input 2+
5 Temperature input 3-
6 Temperature input 3+
Pin Function
1 Temperature input 4-
2 Temperature input 4+
3 Temperature input 5-
4 Temperature input 5+
5 Temperature input 6-
6 Temperature input 6+
Pin Function
1 Temperature input 7-
2 Temperature input 7+
3 Temperature input 8-
4 Temperature input 8+
5 Terminal compensation -
6 Terminal compensation +
1
2
6
5
1
2
6
5
1
2
6
5

CAI 888 C-DIAS TEMPERATURE SENSING MODULE
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X4: Digital outputs plug 1 - 4
Pin 1
X5: Digital outputs plug 5 - 8
Pin 1
X6: Voltage supply for the digital outputs
Pin Function
1 Output 1
2 Output 2
3 Output 3
4 Output 4
Pin Function
1 Output 5
2 Output 6
3 Output 7
4 Output 8
Pin Function
1 +24 V
2 GND

C-DIAS TEMPERATURE SENSING MODULE CAI 888
19.04.2012 Page 9
Applicable connectors
X1-X3: 6-pin. Weidmüller plug B2L3,5/6 AU
X4-5: Phoenix Contact: FK-MCP 1,5/ 4-ST-3,5
X6: Phoenix Contact: FK-MCP 1,5/ 2-ST-3,5
The complete C-DIAS CKL 043 connector set with spring terminals is available from
SIGMATEK under the article number 12-600-043.
a

CAI 888 C-DIAS TEMPERATURE SENSING MODULE
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Status Displays
LED number LED color Definition
1 Yellow Output 1
2 Yellow Output 2
3 Yellow Output 3
4 Yellow Output 4
5 Yellow Output 5
6 Yellow Output 6
7 Yellow Output 7
8 Yellow Output 8
V+ Red Voltage monitor

C-DIAS TEMPERATURE SENSING MODULE CAI 888
19.04.2012 Page 11
Wiring Guidelines
The signals recorded by the analog modules are very small, as compared to the digital
signals. To ensure error-free operation, a careful wiring method must be followed.
• The 0 V connection of the excitation voltage must be connected with the 0 V
assembly point over the shortest route possible.
• The lines connected to the source of the analog signals must be as short as possible
and parallel wiring to digital signal lines must be avoided.
• The signal lines should be shielded or at least twisted pair wires.
General Information on the Contact Point
Temperature measurement using thermocouples is based on the temperature-dependent
voltage, which is generated through the combination of two conductors from different
metals (alloys); this is called the Seebeck effect.
This voltage exists therefore not only at the measurement point (where it is desired) but
also at the coupling between the Thermocouple conductors and the copper connection.
The thermo voltage at this location is not desired, however, it is unavoidable. This voltage
falsifies the measurement value by that of the temperature at the coupling!
An exact measurement is therefore only possible if the voltage corresponding to
temperature of the cold junction is measured and added the voltage at the measurement
point. All required circuits are integrated in the analog card. The HW class runs the
compensation.
Thermocouples should therefore be connected directly to the connector plug on analog
card (over compensating circuits when possible).
For thermocouple applications where the compensating circuit is not connected to the
control, the comparison measurement must be made at the junction of the thermocouple
(or compensating circuit) and the copper conductor.

CAI 888 C-DIAS TEMPERATURE SENSING MODULE
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Connecting the Thermocouple to the control
KTY 10-62
Temp+
Temp-
Screening
Thermocouple
0V rail
Temp. comp. -
Temp. comp. +
1
2
5
6
5
6
1
2
X3
− If the sensor is galvanically separated, GND must be bridged with the Temp input at
the terminal.
− With non-separated sensors, a sufficient mass connection between the machine mass
and the 0 V bus in the control box must be provided.
− The KTY 11-62 serves as the terminal compensation.

C-DIAS TEMPERATURE SENSING MODULE CAI 888
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Connecting the Thermocouple over an intermediate terminal
Temp+
Temp-
Screening
Temp. comp. -
Temp. comp. +
1
2
5
6
KTY 10-62
Intermediate terminal
Thermocouple
5
6
1
2
0V rail
− If the sensor is galvanically separated, GND must be bridged with the Temp input at
the terminal.
− With non-separated sensors, a sufficient mass connection between the machine mass
and the 0 V bus in the control box must be provided.
− The KTY 11-62 serves as the terminal compensation.

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General Information on the Digital Outputs
Up to 8 outputs are powered by a common +24 V supply.
The cross section of the conductor for the +24 supply must be sufficient for the maximum
total current.
The outputs and can be turned off by turning off the +24 V supply voltage.
Applying power to an output whose supply voltage exceeds 0.7 V is not allowed.
Inductive loads must always be connected to a free wheeling diode or an RC
network. This should be placed as close to the load as possible.
Connecting inductive loads:
Output
GNDRecovery diode Contactor coil
Free wheeling diode