Preface and general information
1
Preface and general information
1.1
Principle of operation
The V004 variant of the 9300 range of controllers supports the ” Safe standstill” safety function and
protects against unexpected start-up according to the requirements of EN 954-1 “ Control category
3” and EN 1037.
The controllers are therefore equipped with an integrated safety relay with feedback contact. The
safety relay isolates the supply voltage of the optocouplers for pulse transmission to the IGBTs. An
ex24V DC is required.
This solution offers the following advantages:
•
no external motor contactor
•
reduced wiring expenses
•
saves space
•
improved EMC: the motor cable screen must not be interrupted
1.2
About these Instructions
•
These Instructions are only valid together with the Operating Instructions for the
corresponding controller. All information given in the Operating Instructions still
applies and must be observed.
•
These Instructions only describe the additional measures to be taken to activate the
“Safe standstill” function:
– wiring of the safety relay
– correct sequence for switching the controllers on and off.
•
All information given in these Instructions must be observed without exception.
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