Siemens SIMATIC S7-1200

Technical specifications
A.14 Analog signal boards (SBs)
S7-1200 Programmable controller
System Manual, V4.2, 09/2016, A5E02486680-AK
1519
A.14.4
Thermocouple signal boards (SBs)
A.14.4.1
SB 1231 1 analog thermocouple input specifications
Note
To use this SB, your CPU firmware must
be V2.0 or higher.
Table A- 222 General specifications
Technical data
SB 1231 AI 1 x 16 bit Thermocouple
Article number
6ES7231-5QA30-0XB0
Dimensions W x H x D (mm)
38 x 62 x 21
Weight
35 grams
Power dissipation
0.5 W
Current consumption (SM Bus)
5 mA
Current consumption (24 V DC)
20 mA
Table A- 223 Analog inputs
Technical data
SB 1231 AI 1x16 bit Thermocouple
Number of inputs
1
Type
Floating TC and mV
Range
• Nominal range (data word)
• Overrange/underrange (data word)
• Overflow/underflow (data word)
See Thermocouple filter selection table (Page 1520).
Resolution
Temperature
0.1° C / 0.1° F
Voltage
15 bits plus sign
Maximum withstand voltage
±35 V
Noise rejection 85 dB for the selected filter setting
(10 Hz, 50 Hz, 60 Hz, 400 Hz)
Common mode rejection > 120 dB at 120 V AC
Impedance
≥ 10 M Ω
Accuracy See Thermocouple selection table (Page 1520).
Repeatability
±0.05% FS
Measuring principle
Integrating
Module update time
See Thermocouple filter selection table (Page 1520).
Cold junction error
±1.5° C
Isolation (field side to logic)
707 V DC (type test)