Siemens SIMATIC User Manual

Analog modules
6.6 Analog input module SM 331; AI 8 x 13 Bit; (6ES7331-1KF02-0AB0)
S7-300 Module data
352 Manual, 06/2017, A5E00105505-AJ
● Notes on programming
Note
Only
bits 0 and 2 in the process image input are relevant for evaluation. You can use bits
0 and 2 to monitor the temperature of a motor, for example.
Bits 0 and 2 in the process image input cannot be saved. When assigning parameters,
make sure that the motor,
for example, starts up in a controlled manner (by means of an
acknowledgment).
Bits 0 and 2 can never be set at the same time; they are set one after the other.
Using silicon temperature sensors
Silicon temperature sensors are commonly used to detect temperatures in motors.
● When assigning the parameters, select measurement type "thermoresistor" and
measuring range "KTY83/110" or "KTY84/130".
● Connect the temperature sensor (see "Terminal diagram for resistance measurement").
Use temperature sensors which comply with the Product Specifications published by
Philips Semiconductors.
● KTY83 series (KTY83/110)
● KTY84 series (KTY84/130)
Also take note of the accuracy of the temperature sensors.
The temperature is specified in 0.1 degrees C, 0.1 degrees K, and/or 0.1 degrees F, see
section Representation of the values for analog input channels (Page 262).

Siemens SIMATIC Specifications

General

Product type designation	SIMATIC
CPU	Varies by model
Memory	Varies by model
Input/Output	Varies by model
Communication	Varies by model
Programming Language	STEP 7
Operating Temperature	0°C to 60°C (varies by model)
Protection Class	IP20
Category	Programmable Logic Controller (PLC)