Siemens S7-1200 System Manual page 956

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Table of Contents

Technical specifications

A.12 Analog signal boards (SBs)

It is recommended for measuring thermocouples that a 100 ms integration time be used. The

use of smaller integration times will increase the repeatability error of the temperature

After power is applied to the module, it performs internal calibration for the analog to digital

converter. During this time, the module reports a value of 32767 on each channel until valid

data is available on that channel. Your user program may need to allow for this initialization

Table A- 227 Wiring diagram for SB 1231 AI 1 x 16 thermocouple

SB 1231 AI 1 x 16 bit thermocouple (6ES7 231-5QA30-0XB0)

Note: Connectors must be gold. See Appendix C, Spare Parts for order number.

Table A- 228 Connector pin locations for SB 1231 AI 1 x 16 bit thermocouple (6ES7 231-5QA30-

No connection

S7-1200 Programmable controller

System Manual, 03/2014, A5E02486680-AG