Victron energy Venus GX Manual page 24

for any reason (after any operational fault or during a black start). The VE.Bus devices will not boot-up
until the CCGX has power ...but the CCGX will not boot-up until it has power. This deadlock can be
rectified by briefly unplugging the CCGX VE.Bus cable at which point you will observe the VE.Bus
products will immediately begin to boot-up.
Or a modification can be done to the RJ45 cabling. See FAQ Q21 for more information about this.
Isolation
Because the CCGX is connected to many different products, please ensure that proper care is taken
with isolation to prevent ground loops. In 99% of installations this will not be a problem.
The VE.Bus ports are isolated
The VE.Direct ports are isolated
The VE.Can ports are isolated
The USB ports are not isolated. Connecting a Wi-Fi Dongle or GPS Dongle will not create a
problem as it is not connected to another power supply. Even though there will be ground loop
when you mount a separately-powered USB hub, during extensive testing we have not found
that it caused any issues.
The Ethernet port is isolated, except for the shield: use unshielded UTP cables for the Ethernet
network
Extending USB ports by use of a self-powered USB hub
Although the number of USB ports can be extended by using a hub, there is a limit to the amount of
power that the onboard USB port can provide. When extending the number of USB ports, we
recommend you always use powered USB hubs. And to minimize the chance of issues, be sure to use
good-quality USB hubs. As Victron also offers a VE.Direct to USB adapter, you can use this
arrangement to increase the number of VE.Direct devices you can connect to your system, please see
this document for the limit of how many devices can be attached to various different GX devices.
1.4 Connecting Victron products
1.4.1 Multis/Quattros/Inverters (VE.Bus products)
In order to keep this document short we are going to refer to all Multis, Quattros and Inverters as
VE.Bus products.
The earliest version of the VE.Bus devices which can be connected to the CCGX is 19xx111 or
20xx111, which were released in 2007. VE.Bus firmware 26xxxxx and 27xxxxx are also supported ...
but 18xxxxx is not.
Note that it is not possible to use the Remote On/Off (header on the VE.Bus control PCB) in
combination with a CCGX. There should be wire between the left and middle terminal, as it is when
shipped from the factory. In case a wired switch that disables the system is required, use the Safety
Switch Assistant.
Color Control GX manual