Thermal Motor Protection; Holding Brake; Properties - Siemens SIMOTICS S-1FG1 Operating Instructions Manual

3.6.3

Thermal motor protection

A temperature-dependent resistor is integrated in the stator winding as temperature sensor to
monitor the motor temperature.
Table 3-6
Type
Resistance in the cooled-down state (20 °C)
Resistance in the hot state (100 °C)
Connection
Response temperature
*) The temperature output value at encoder AM25EN22 with EnDat 2.2 interface does not directly
correspond to the winding temperature. Observe the table below.
3.6.4

Holding brake

3.6.4.1

Properties

The holding brake is used to clamp the motor shaft when the motor is at a standstill. The holding
brake is not a working brake to brake a rotating motor.
The holding brake can be implemented as a permanent magnet brake or a spring-loaded
brake.
Unintended movement of the system or machine
If you use the holding brake improperly, e.g. as a safety brake, or you ignore the number of
operations of the brake, the braking effectiveness of the holding brake can be irreversibly
reduced. This can result in unintended movement of the machine or system, which can result
in severe injury or death.
• Strictly observe the permissible number of operating cycles.
• Operate the servo geared motor only in conjunction with an intact brake.
SIMOTICS S-1FG1 servo geared motor
Operating Instructions, 12/2022, A5E47360747B/RS-AC
Features and technical data
Winding temperature of the motor
130 °C
145 °C
WARNING
3.6 Mounting and options
Pt1000
Approx. 1090 Ω
Approx. 1390 Ω
Via signal cable
Prewarning > 130 °C
Alarm/disconnection > 145 °C ±5 °C
Encoder output value
Prewarning > 4452
Alarm/shutdown > 4525
Description
*)
41