Thermal Motor Protection; Thermal Motor Protection Using Ptc Thermistors (Option); Interlock Circuit For The Automatic Regreasing System (Option); Interlock Circuit For Anti-Condensation Heating - Siemens SIMOTICS FD 1LH1 Operating Instructions & Installation Instructions

4.6

Thermal motor protection

The machine is equipped with measuring equipment for direct monitoring of the motor
temperature to protect the machine against overload during operation. Plan a corresponding
circuit for monitoring.
4.7

Thermal motor protection using PTC thermistors (option)

The machine is equipped with PTC thermistors for direct monitoring of the motor temperature
to protect the machine against overheating during operation. Plan a corresponding circuit for
monitoring.
4.8

Interlock circuit for the automatic regreasing system (option)

Relubrication is permitted only for a rotating shaft. Consequently, deploy an interlock circuit for
machines with automatic regreasing system to prevent them from operating at machine
standstill.
4.9

Interlock circuit for anti-condensation heating

If the anti-condensation heating is operated while the machine is running, this can increase the
temperatures inside the machine.
● Install an interlock circuit that switches off the anti-condensation heating once the main
● Only switch on the anti-condensation heating after the machine has been switched off.
See also
Safety instructions for operation (Page 111)
4.10

IM B5 type of construction with support foot

● For machines, type of construction IM B5, provide an additional support foot at the NDE. The
● Use an appropriately sized support foot with the appropriate rigidity. The support foot must
● There is a threaded hole M36 at the bottom of the machine where you can attach the support
SIMOTICS FD 1LH1
Operating Instructions 01/2019
machine is switched on.
support foot is not included in the scope of supply.
be able to support the total weight of the machine.
The weight of the machine is stated on the rating plate, data on geometry is shown in the
dimension drawing.
foot.
Preparations for use
4.6 Thermal motor protection
37