Table of Contents
Advertisement
Preparations for use
4.7 Interlock circuit for the external fan motor
4.6.5
Interlock circuit for the cooling-water monitoring
Cooling-water temperature and flow rate
The machine temperature class is only guaranteed if the air-to-water cooler is in working order.
● Monitor the cooling water flow rate and the maximum permissible cooling water temperature
● Select the safety levels of the monitoring equipment in accordance with Category 1 to
Explosion hazard if the air-to-water cooler fails
If the cooling water is not at the required temperature, the machine will overheat. The
temperature class cannot be adhered to. Any gases in the surrounding atmosphere can be
ignited, which will result in an explosion. This can result in death, serious injury or material
damage.
If the air-to-water cooler is not operational, take the following action:
● Do not commission the machine.
● Switch the machine off.
● Set up an interlock circuit so that the machine cannot be put into operation when the
4.7
Interlock circuit for the external fan motor
Interlock circuit for the external fan motor
For machines with external fans, install an interlock circuit that prevents the main machine
being switched on if the external fan is not operational.
See also
Connecting an external fan motor (Page 100)
4.8
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.
38
specified on the machine nameplate in accordance with the special condition of the EU type
test certificate.
ISO 13849-1.
WARNING
cooling-water supply is not guaranteed.
SIMOTICS FD 1MN1
Operating Instructions 02/2019
Advertisement
Table of Contents
