Siemens SIMATIC S7 - Page 756

Technical specifications
A.5 Thermocouple and RTD expansion modules (EMs)
S7-200 SMART
756 System Manual, V2.3, 07/2017, A5E03822230-AF
The ranges and accuracy for the different thermocouple types supported by the EM AT04
Thermocouple expansion module are shown in the table below.
Table A- 121 EM AT04 Thermocouple selection table
Type
Under-range
minimum
1
Nominal range
low limit
Nominal range
high limit
Over-range
maximum
2
Normal range
3, 4
accuracy @ 25 °C
Normal range
1, 2
accuracy -20 °C
to 55 °C
J
-210.0 °C
-150.0 °C
1200.0 °C
1450.0 °C
±0.3 °C
±0.6 °C
K -270.0 °C -200.0 °C 1372.0 °C 1622.0 °C ±0.4 °C ±1.0 °C
T
-270.0 °C
-200.0 °C
400.0 °C
540.0 °C
±0.5 °C
±1.0 °C
E
-270.0 °C
-200.0 °C
1000.0 °C
1200.0 °C
±0.3 °C
±0.6 °C
R & S
-50.0 °C
100.0 °C
1768.0 °C
2019.0 °C
±1.0 °C
±2.5 °C
B
0.0 °C
200.0 °C
800.0 °C
--
±2.0 °C
±2.5 °C
--
800.0 °C
1820.0 °C
1820 °C
±1.0 °C
±2.3 °C
N
-270.0 °C
-200.0 °C
1300.0 °C
1550.0 °C
±1.0 °C
±1.6 °C
C
0.0 °C
100.0 °C
2315.0 °C
2500.0 °C
±0.7 °C
±2.7 °C
TXK/XK(L)
-200.0 °C
-150.0 °C
800.0 °C
1050 °C
±0.6 °C
±1.2 °C
Voltage -32512 -27648
-80mV
27648
80mV
32511 ±0.05% ±0.1%
1
Thermocouple values below the under-range minimum value are reported as -32768.
2
Thermocouple values above the over-range maximum value are reported as 32767.
3
Internal cold junction error is ±1.5 °C for all ranges. This adds to the error in this table. The module requires at least 30
minutes of warm-up time to meet this specification.
4
In the presence of radiated radio frequency of 970 MHz to 990 MHz, the accuracy of the EM AT04 AI 4 x 16 bit TC may
be degraded.
Note
Thermocouple channel
Each channel on the Thermocouple expansion module can be configured with a different
thermocouple type (selectable in the software during configuration of the module).
Table A- 122 Noise reduction and update times for the EM AT04 Thermocouple
Rejection frequency selection
Integration time
4 Channel module update time (seconds)
400 Hz (2.5 ms)
10 ms
1
0.143
60 Hz (16.6 ms)
16.67 ms
0.223
50 Hz (20 ms)
20 ms
0.263
10 Hz (100 ms) 100 ms 1.225
1
To maintain module resolution and accuracy when 400 Hz rejection is selected, the integration time is 10 ms. This
selection also rejects 100 Hz and 200 Hz noise.