Programmable HV Power Supply
Revision 19
n
CAEN
T o o l s f o r D i sc o v e r y
Fig. 4.4: C21 jumper location
4.3.1 Safety Earth connection
The connection of return to Earth is fundamental for User s afety. The connection must always be at the l evel of
detector or power s upply system.
Return connection even if not present or performed incorrectly, due to protection circuits implemented on the
N14xx are bound to Earth; i n this case the voltage difference between return and Earth (Sys tem), i s limited to
approximately 50V. Please note that this is a status of emergency-protection, not a working one. The Connector
Confi gurator allows to optimize the connection of the return and of AGND (Earth). The best configuration must
be determined by the user upon application, the optimal connection depends on many cha racteri s tics of the
rel ated experiment.
The foll owi ng diagrams show two exa mples of configurati on, namely:
The “clos ed loop “ Ea rth configurati on ( C21 conta cts clos ed)
The “open l oop” Earth confi gura ti on (C21 contacts open)
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