Lenze 8250 series Brake unit - Manual (Page 23)

Installation
4-4 8250BA0903
4.2 Electrical installation
4.2.1 Operator’s safety
Danger!
After switching off the mains voltage, all power terminals (+U
G
,
-U
G
and RB1, RB2) of the brake unit remain live for up to
3 minutes.
Therefore please wait for 3 minutes after having switched off the
mains voltage before you start to work.
- For single drives, the brake unit carries a hazardous
voltage up to three minutes after mains disconnection.
- In a drive network, all controllers must be inhibited and
disconnected from the mains.
Danger!
During braking operation (e.g. test stand, high inertia loads etc.)
the voltage is still present after mains switching (OFF).
It is therefore necessary to set all controllers to controller inhibit.
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