Operating instructions

Commissioning
Feed/Feed-Back Units BUC 624, 625 43
Baumüller Nürnberg GmbH 5.96024.06a
6.2 Operation
Switch-on sequence
First of all, auxiliary relay D1 must supply power to the charging circuit.
After the charging time of between 2 and 10 seconds (depending on the DC link capacitance) has ex-
pired, the device switches on the main contactor itself via contact X1:4/5 "Enable main contact".
Now the external controller has to switch off the charging circuit from mains with die auxiliary relay D1.
After the "Enable main contact" is generated, the external controller can switch K1 on and off independ-
ently of D1.
If the main contactor is off, the system generates internally the mains failure message and deactivates
internally and externally Ready for use. This message is not stored.
Reset
Resets operating messages that the Feed/Feed back Unit stores:
y Set reset input on plug X99AB:5,6
y Switch off the +24-V supply voltage
You do not need to make any settings on the BUC 624, 625 Feed/Feed back Unit!
NOTE
In the case of a reset, the system generates a pulse disable that disables the ready for use at the
same time.
Using reset X98:5,6, you can reset messages that the basic unit generated. A permanent reset
(+24 V) may not be connected. The reset signal must be pending for at least 50 ms.