The DCU has an inbuilt termination resistor at its end.
When the bus is properly connected, the measured impedance between bus terminals A and
B shall be 60 ohm (+/- 5 ohm).
Wire Requirement
Wires shall have a minimum area of 1.0 mm
2
(16 AWG).
3.4.3 Generator Current Interface
Connect the generator current interface as follows:
Phase
Current Transformer
RIO 425 Terminal
L1
S1
S2
1
2
L2
S1
S2
3
4
L3
S1
S2
5
6
If only one phase is to be monitored, it is sufficient to connect the desired phase terminals.
Wire Requirement
The wire area shall be minimum 2.5 mm
2
(12 AWG).
3.5 Configuration
The RIO 425 can be configured from the web server on a DCU in the Auto-Maskin Marine
Pro range. This is the easiest and preferred method.
If no such DCU is available, the RIO 425 can be configured using the user interface on the
front of the unit.
The current transformer ratio is pre-configured to 5:1. It is possible to change this
ratio to 1:1, but only using the RIO 425 user interface.
3.5.1 Configuration from the DCU Web Server
Log into the DCU, and then select
Home
and then
RIO 425
.
Set the desired values and press the
Submit
button.
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