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Periodical check Section E-5
In combination with the safety device complying to the class complying PL=d,
PL=d of the inverter is to be achieved.
E-5 Periodical check
Since the drive stops even one of the GS1 or GS2 is interrupted, it is to be
reconfirmed that there is not faiure in the path of GS1 and GS2 periodically.
Period of this maintenance is once per year, and the method to make sure
GS1 and GS2 in combination with EDM signal is as described below.
E-6 Precautions
1. To assure, that the Safe Disable function appropriately fulfills the safety re-
quirements of the application, a throughout risk assessment for the whole
safety system has to be carried out.
2. If EDM signal is not utilized in the system as a reconfirmation of redundan-
cy between GS1 and GS2, PL of drive is downgraded to PL=b.
3. The Safe Disable function does not cut the power supply to the drive and
does not provide electrical isolation. Before any installation or mainte-
nance work is done, the drives power supply must be switched off.
4. The wiring distance for the Safe Disable inputs should be shorter than
30 m.
5. The time from opening the Safe Disable input until the drive output is
switched off is less than 10 ms.
6. When two or more inverters are connected to common GS1 and GS2 wir-
ing, please be sure to put the diode as instructed in page 178, otherwise
the drive may start to work even in the safety mode.
Terminal Status
GS1 On off On off
GS2 On On off off
EDM On off off off
(output) forbidden forbidden forbidden Allowed
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