Siemens S120 configurationmanual Name Description

Motor components of the built-in motor and options 3.2 Thermal motor protection

Table 3- 2 Technical data for the PTC thermistor triplet (PTC triplet)

Name	Description
Type	PTC triplet (acc. to DIN 44082- M180)
Response temperature	130 °C ± 5 K
(rated response temperature ϑNAT)	150 °C ± 5 K
PTC resistance (20 °C) at the triplet	≤ 3 · 250 Ω (750 Ω), refer to the characteristic
from - 20 °C up to ϑNAT - 20K
Minimum triplet resistance when hot
at T = ϑNAT – 5 K	≤ 3 · 550 Ω (1650 Ω), refer to the characteristic
at T = ϑNAT + 5 K	≥ 3 · 1330 Ω (3990 Ω), refer to the characteristic
at T = ϑNAT + 15 K	≥ 3 · 4000 Ω (12000 Ω), refer to the characteristic
Connection	Connect signal cable with connector to SME12x
	module.
Application	It is mandatory that a PTC triplet is connected in
	order to protect the motor
	against overtemperature. At the very least, the
	Temp-S must be connected with the rated
	response temperature of 130°C.
Typical characteristic R(ϑ) of a PTC temperature
sensor
Temp-S comprises 3 PTC temperature sensors
connected in series!

37&

Note

As a result of the additional PTC to monitor the power connection, the values for the PTC resistance and the minimum resistance change when warm. Factor "4" must be used instead of factor "3".

1FW6 Built-in torque motors	45
Configuration Manual, 05/2009, 6SN1197-0AE00-0BP3