
DC Controller
UPC4 Master
User Manual
Page 11/100
©2010. ELTEK VALERE DEUTSCHLAND GmbH. UM_UPC4_V2.00_E_R1.1_2011-01-04
3.2.1.2 CAN connectors
(see also section 4.2 “Rectifier monitoring
”)
The UPC4 Master provides two different CAN bus systems (see also Figure 1.). CAN bus
connectors a
s described in the following are available:
1. 100 kbit/proprietary protocol → tw
o CAN connectors RJ12 (CAN 1 & CAN 2).
CAN 1 & CAN 2 are designed to connect the following CAN devices (modules):
o Inverters INV & UNV
o Static bypass switches STS & UNB
o Rectifiers PSR & PSS
o DC/DC converters PSC
o Remote control panels RDP & RDD
o Extension modules such as UPC4 Basic Unit BUI, battery monitoring board BMB,
main
s monitoring board MMB, fuse monitoring board FMB, digital input board DI8,
relay board RLB, universal measurement devices UMA & UMB.
2. 125 kbit/proprietary protocol → two C
AN connectors RJ45 (CAN 3 & CAN 4).
CAN 3 & CAN 4 are designed to connect rectifiers of type “Flatpack”, “Minipack”, “Micropack”, and
“Powerpack”.
3.2.1.3 Termination switches
Both CAN bus systems CAN 1 & 2 and CAN 3 & 4 as well are equipped with CAN bus termination
switch
es as shown in Figure 2.
The CAN-Bus of the system must be terminated at both ends. If the UPC4 Master is used as final CAN
node wit
hin the system (in this case only one of the CAN connectors CAN 1 or CAN 2 are connected),
the termination resistor must be enabled by moving the slide switch (Termination ON/OFF) to ON
position.
If the unit is connected between two CAN nodes, the termination resistor must be disabled by moving
the sli
de switch to OFF position.
The same is valid for CAN 3 and CAN 4.
NOTE:
Missing terminations or too many terminations within the system may
disturb the CAN-Bus communication.
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