Siemens SIMATIC ET 200S - Page 504

Analog Electronic Modules
12-98
ET 200S Distributed I/O System
EWA-4NEB 780602402-12
Data for selection of the sensor
Input range (rated
value)/input resistance
• Voltage 80 mV/min. 1 MΩ
• Thermocouple Type E, N, J, K, L, S,
R, B, T, C/min. 1 MΩ
Permitted continuous input
voltage (destruction limit)
20 V, continuous
Connection of signal
generators
• For voltage
measurement
possible
Characteristics linearization Yes, configurable for
Type E, N, J, K, L, S,
R, B, T, C as per
IEC 584
Temperature compensation
• Internal temperature
compensation
Possible, with
TM-E15S24-AT
TM-E15C24-AT
• External temperature
compensation by
looping a compensation
unit into the measuring
circuit
Possible, one
external
compensation
unit per channel
Smoothing of measured
values
Yes, configurable in
4 stages by digital
filtering
Level
No
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)
With thermocouple Type C: 8K
3)
With thermocouple Type C: 6K
Compensation of thermocouples with a compensation unit
In addition to the error limits of the 2AI TC High Feature electronic module
(see ”Technical Specifications” table in this chapter), you must also consider the
precision of the compensation unit.