Studer Innotec SA
next3
46 V 1.3 © Studer-Innotec SA next3 Tech manual
5.6 CONNECTING THE STUDER COMMUNICATIONS CABLES
The Studer nx communication bus is used to
interconnect next3 inverters in the case of a
multi-unit application, to connect the nx-
interface or to connect other types of devices
with communication compatibility.
The NEXTs are equipped with a pair of RJ45/8
connectors that allow information transfer via
a communication bus in between next3
devices or accessories that use the
proprietary protocol of Studer-Innotec. In this
network, all parties in the network are
connected in daisy chain.
The cables for Studer nx bus are straight ethernet of category 5
exclusively with 26AWG wire size (power supply through cable).
They are provided by Studer or you can buy your own as long as it
follows these requirements. The total length of the communication
bus cable between all units must not exceed 75 m.
The switch for the communication bus termination remains
in position T (terminated) except when both connectors are
in use. In this case, and only in this case, it must be placed
in the O (open) position. If one of the two connectors is not
in use, the termination switch will be in position T.
In a system comprising a single next3, the connection of the nx-interface or nx-gateway units may
be conducted without stopping the next3 (hot plug).
These connectors must be used only to connect a compatible next3 accessory,
excluding any other type of connection such as LAN, Ethernet, ISDN, etc.
The next3 communication is not compatible with other Studer communication. It is
not compatible with Xtender devices and it must never be directly connected
together.
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