Additional Information On Sm 331; Ai 8 X 13 Bit - Siemens SIMATIC Manual

Analog modules
6.6 Analog input module SM 331; AI 8 x 13 Bit; (6ES7331-1KF02-0AB0)
6.6.3

Additional information on SM 331; AI 8 x 13 Bit

Using the module
The spare parts of the SM 331-1KF02 are compatible with the SM 331-1KF01 and are
configured with HSP 2067. HSP 2067 can be installed for STEP7 V5.4, SP5 and higher and
is included for STEP7 V5.4, SP6 and higher.
Unused channels
Set the "disabled" value at the "measurement type" parameter for unused channels. This
setting reduces module cycle times.
Interconnect the M- terminals of unused channels.
Using PTC resistors
PTCs are suitable for monitoring the temperature of or providing thermal protection for
complex drives and transformer windings. The module has no analog values when PTC
resistances are used. Status information on fixed temperature ranges are displyed instead of
analog values.
● When setting the parameters, select measurement type R "Resistance" and measuring
range "PTC".
● Connect the PTC (see "Terminal diagram for resistance measurement").
● Use PTC resistors that comply with IEC 60034-11-2 (previously, PTC thermistors that
complied with DIN/VDE 0660, Part 302).
● Sensor data for the PTC resistor:
350
S7-300 Module data
Manual, 06/2017, A5E00105505-AJ