Victron energy Digital Multi Control GX Panel Manuel page 6

2.2.3 VE.Bus Multi system + external transfer switch (PowerMan)
If an external transfer switch is placed before the Multis then this switch determines which AC
source is used. The Multis do not have any information about the state of the switch. The DMC
provides a way to specify different shore limits for both AC sources.
To achieve this, the DMC must have information about the state of the external transfer switch.
For this purpose a screw connector is placed at the backside of the DMC.
Normally the DMC will send the shore current set point as determined by the knob to the Multis.
If however the terminals of this screw connector are short circuited the DMC sends a
preconfigured shore limit to the Multis. The display on the DMC will then show: .
The two terminals of the screw connector are to be connected to the PowerMan. An auxiliary
relay of the external transfer switch is the normal place. Refer to the transfer switch manual for
more information.
Refer to chapter 4 for a description on how to connect the DMC to the system.
For this application, the DMC has to be configured because it must "know" the current limit it
should send to the Multis when the terminals are short circuited. Please change the "Generator
current limit" parameter as needed. Refer to chapter 6 for a description of how to do this.
If you want to limit the maximum current the operator can set, you can change the "Upper
shore limit for AC input 1" parameter. Refer to chapter 6 for a description of how to do this.
2.3 Non VE.Bus system with 1 AC source
The DMC must be scaled (matched to the system) when it is used with non VE.Bus systems.
This can be done by changing the "scaling factor" parameter. Refer to the configuration
chapter for a description of how to do this.
After correct scaling the maximum current limit the operator can set is equal to the maximum limit
of the system. If you want to limit the maximum current the operator can set, you have to adapt
the "Upper shore limit for AC input 1" setting. Refer to the configuration chapter for a description
of how to do this.
2.4 Non VE.Bus system with 2 AC sources
The DMC must be scaled (matched to the system) when it is used with non VE.Bus systems. This
can be done by changing the "scaling factor" parameter. Refer to chapter 6 for a description of
how to do this.
A non VE.Bus system with 2 AC sources can only be build with an external transfer switch
(PowerMan). Installation is exactly the same as when using a VE.Bus system with an external
transfer switch so please refer to paragraph 2.2.3.
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