Siemens Simatic S7 Series

Technical specifications
A.5 Thermocouple and RTD expansion modules (EMs)
S7-200 SMART
630 System Manual, 09/2015, A5E03822230-AC
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- 113 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
Ea
ch 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- 114 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.