Analog Electronic Modules
12-122
Distributed I/O System ET 200S
EWA 4NEB 780 6024-02 07
Data for Selecting a Sensor
Input range (rated
value)/input resistance
Voltage "80 mV/min. 1 MΩ
Thermocouple Types E, N, J, K, L,
S, R, B, T, C/
min. 1 MΩ
Permitted input voltage
(destruction limit)
"20 V, continuous
Connection of the sensors
For measuring voltage Possible
Characteristic curve lineari-
zation
Yes, parameteriza-
ble for types E, N, J,
K, L, S, R, B, T, C to
IEC 584
Temperature compensation
Internal temperature
compensation
Possible with
TM-E15S24-AT
TM-E15C24-AT
External temperature
compensation by
looping a compensating
box into the measuring
circuit
Possible, one
external
compensating box
per channel
Smoothing of the measured
values
Yes, parameteriza-
ble in 4 steps by
means of digital filte-
ring
Step
None
Weak
Medium
Strong
Time constant
1 x cycle time
4 x cycle time
32 x cycle time
64 x cycle time
1
The specified error limits apply as of the
following temperatures:
Thermocouple type T: –200 C
Thermocouple type K: –100 C
Thermocouple type B: +700 C
Thermocouple type N: –150 C
Thermocouple type E: –150 C
Thermocouple type R: +200 C
Thermocouple type S: +100 C
2
In the case of thermocouple type C: "8 K
3
In the case of thermocouple type C: "6 K
Compensation of Thermocouples with a Compensating Box
In addition to the error limits of the 2AI TC High Feature electronic module (see the
table entitled “Technical Specifications” in this chapter), you must take into account
the accuracy of the compensating box.
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