AIS CTRX GRAPHENE Class B AIS Transponder Manual
1.9E
20
CTRX GRAPHENE Manual
CONNECTION TO THE DC POWER SUPPLY
Now the connection to the DC power supply is all that is left. The AIS CTRX GRAPHENE
can be connected to any DC power supply providing between 12V to 24V DC. The lower limit
is 10V. Should the supply voltage go below 10V the RED ERROR LED on the front panel will
light up and the unit will cease to transmit. The upper limit is 32VDC. This is the maximum
allowable voltage. If the upper voltage limit is exceeded severe damage will be made to the
transponder.
The DC supply point should be chosen with care. The recommended source should be the
same as the VHF radio and/or other navigational equipment.
Even though the source may be protected with a circuit breaker the transponder must have
its own fuse protection. The recommendation is to use two
3A fuses
(one on the positive lead
and one on the negative lead) to provide protection for the transponder.
Note
that the negative lead (-) on the transponder is connected to the same point as the
ground on the VHF and GPS antenna connector. This means that if any of the antennas
(VHF or GPS) is bolted to a metal structure on board, can result in a connection to the
negative pole of the power supply (battery). If the unit is installed in a vessel with a metal hull
it is highly recommended that a galvanic isolated DC/DC converter is used between the
battery supply and the transponder to prevent galvanic corrosion or damage to the data
interface.
Note:
Be careful not to reverse the polarity of the power supply leads, this may cause
severe damage to the transponder.
The transponder is supplied with a combined Data/DC power cable. The power supply is
connected as follows:
RED
and
ORANGE
cable (twisted together) connects to
positive (+)
BLUE
and
BLACK
cable (twisted together) connects to
negative (-)
Do not forget the fuses !
DC/DATA Cable
RED
ORANGE
BLACK
BLUE
+9-32 VDC Power supply
0V DC (Ground)
3A Fuse
3A Fuse
