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3. Description of the Digital Multi Control panel
The DMC is a remote panel designed to work with all Multis/Quattro's and Multi/Quattro systems.
This includes stand alone, parallel and 2-3 phase configurations. Both VE.Bus and non VE.Bus
systems are supported.
With the DMC a separate shore current and generator current can be set.
When used in an extended VE.Bus system one can even set up to 4 different shore currents.
For VE.Bus systems, the DMC will automatically adapt the adjustable range to match with the
connected system.
3.1 Generator support
The DMC provides a means to change the AC input current limit when the AC source is switched
externally from shore to generator.
Normally the DMC will send the shore current set point as determined by the knob to the
connected devices. If however the terminals of the screw connector on the backside of the DMC
are short circuited the DMC sends a preconfigured shore limit to the connected devices.
This preconfigured limit is generally used for a generator. The display on the DMC will therefore
show:
.
The two terminals of the screw connector are to be connected to an externally controlled switch.
Normally spoken this will be an auxiliary relay of an external transfer switch.
3.2 Connecting VE.Bus devices
Using the DMC with VE.Bus devices is straightforward. Just connect the DMC to the system. The
maximum/minimum shore currents which can be set are automatically adapted to the system.
This means that:
- Connecting the DMC to one Multi with 16A feed through capacity will limit the maximum shore
setting to 16A.
- Connecting the DMC to five of these Multis in parallel will result in 80A as maximum shore limit.
(If needed, an upper limit can be set to prevent the operator from setting a too high shore limit.
(See section 6.4)
The DMC is capable of dealing with a Quattro or an extended VE.Bus system which has more
than 1 AC input. When the system switches over from one AC input to another, the DMC switches
too, setting the current limit to the last used value for that AC input.
In the Multi/Quattro configuration it is possible to indicate that a shore current limit is not to be
overruled by the remote panel. In such a case the DMC will not display a shore current limit value
but it will display the AC input identification as
,
,
or
.
If, in a system with more than 1 input, the corresponding input does allow changing by the remote
panel, the DMC will display the shore current value and the AC input identification alternating.
Exception to this is AC input 1. If AC input 1 is active only the shore current value will be
displayed and not the AC input identification.
4
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