Siemens SIMOTICS S-1FK7 - Page 36

Description of the motors
2.6 Mounting and options
1FK7 G2 synchronous motors
34 Operating Instructions, 05/2021, A5E50907562B AA
Table 2- 7 Features and technical data
Type
KTY 84-130
Pt1000
Resistance when cold
(20°C)
Approx. 580 Ω
Approx. 1090 Ω
Resistance when hot
(100°C)
Approx. 1000 Ω
Approx. 1390 Ω
Connection
Via signal cable
Via signal cable
Response temperature
Prewarning > 130°C
Alarm/disconnection at max. 145°C
±5°C
Prewarning > 130°C*)
Alarm/disconnection at max. 145°C
±5°C *)
*) For AM25EN22 encoders
with EnDat 2.2, the temperature output value does not directly correspond
to the winding temperature. Observe the table below.
Winding temperature of the motor
Output value of the AM25EN2.2 encoder
130°C
Prewarning > 4452
145°C
Alarm/disconnection > 4525
The following figure shows the resistance characteristic as a function of the temperature for
KTY 84-130 and Pt1000 temperature sensors.
Figure 2-4 Comparison of KTY 84-130 and Pt1000 temperature sensors
The winding temperature is evaluated in the converter. When a fault occurs, an appropriate
message is output at the converter. When the motor temperature increases, a message
"Alarm motor overtemperature" is output. The message can be evaluated externally.