2 Overview
N1C L-Series(1-3kVA) UPS
User Manual
14
Figure2-12
Pin definition of RS485 and dry contact
The illustration of dry contact is as below:
1.
CN1, CN2, CN3 determine that dry contact output signal is normal open or normal close. In
default, dry contact output signal is normal close, that is PIN1 connects with PIN2. If one route
signal needs to set to normal open, connect PIN2 with PIN3.
2.
The requirements for input signal of dry contact: the voltage should be less than 60Vdc or 42Vac
RMS and the current should be less than 1.25A.
2.3 Working Principles
When the mains is normal, the input of N1C L-Series(1-3kVA) UPS converts into the
±
360V steady
DC voltage through PFC, which supplies power for DC/AC inverter to output steady 220V AC and
charges battery at the same time. When the mains is abnormal, the battery will boost into the
±
360V
DC voltage for DC/AC inverter through DC/DC.
The working principles of N1C L-Series(1-3kVA) UPS is as shown in Figure2-13. The DC/AC inverter
adopts half bridge structure and the DC/DC boost adopts the push-pull circuit or boost circuit. PFC is
the correction circuit for active power factor.
