Primary Switch Mode Inverter
UNV-F
Operation Manual
Page 20 (28)
BHB.UNV-F.D65-1050.HB101
6.3.6 CAN-Interface
The inverter is equipped with a serial data interface accord-
ing to CAN (= controlled area network) specification.
Via CAN-Bus, several inverters in a system or parallel con-
nection can be controlled and monitored by a central unit
which is integrated into the static switch unit UNB.
Following parameters of a specific inverter unit can be con-
trolled or read out:
Remote ON/OFF
Inverter status (OK/failure)
Input voltage (measurement value)
Input current (measurement value)
The CAN-Bus connectors are located on the front panel. The
wiring to the central unit should be as shorte as possible.
Cable length must not exceed 30m.
7. Operation in parallel
ATTENTION! Before starting several units in parallel it is im-
portant to check the output frequency and voltage on each
unit without any connections between the units.
In the next step it has to be checked that the connections of
the SYNC-BUS wires between the modules are correct.
ATTENTION! The unit which transmits the synchonization
signal to synchronization bus at first will be the master. If
this master unit is disturbed or switched off, another unit
overtakes the master function. In systems with static bypass
switch (SBS) the inverters will be synchronized by SBS unit.
The inverter output relay switches the inverter output to AC
busbar if the internal voltage is O.K. and the output voltage
is in the correct range. In this way defective modules switch
off themselves and are disconnected from the AC bus auto-
matically.
