Installation manual

Page 6© 2009 Active Research Limited
Figure 1 shows an internal view of the NGT-1-USB
Printed Circuit Board (PCB).
1. NMEA 2000 Interface
A ve way screw terminal block is supplied for
connecting the NMEA 2000 cable. The CAN interface
is fully compatible with the NMEA 2000 standard.
Actisense supplies a pre-tted four-core screened
cable for the NMEA 2000 connection, tted with a
male micro-t connector. The colour codes used for
this cable are:
Wire colour NMEA 2000
Shield / Screen SHIELD
Blue NET LO
White NET HI
Black NET COM
Red NET SUP
If you need to use your own NMEA 2000 cable, the
ve way screw terminal block is provided within the
NGT-1 to allow easy connection, along with a spare
cable gland that should be tted on to the new cable
to help maintain the water protection level.
Any such cable is required to conform in full to
the NMEA 2000 specication and be no longer
than 6 metres (maximum drop length).
2. NMEA 2000 indicator LED
This LED ashes when NMEA 2000 data to be
transferred is received by the NGT-1-USB. It can be
clearly seen through the NGT-1-USB’s translucent lid
when the case is closed.
3. A micro-connector to connect to the supplied
USB type A cable
This connector should not normally be removed:
it is installed at the factory and is not customer
serviceable.
4. USB indicator LED
This LED ashes when USB data to be transferred is
received by the NGT-1-USB. It can be clearly seen
through the NGT-1-USB’s translucent lid when the
case is closed.
To open the NGT-1-USB, remove the two screws in the
base of the unit, then slide off the top of the case. The
cable glands need to be slid out from the top of the case
in order to access the internal connections. The NGT-1-
USB circuitry will be left attached to the base of the unit
and the two supplied cables attached to their connectors.
Note: When opening the NGT-1-USB case, be aware
that the circuitry inside is not 100% protected against
static electricity. Please ensure that, when opening
the case, you use precautions against static damage
by only touching the connector block and by holding
the unit by its plastic base. In this way, the risks of
static damage will be minimised.
Connections
Figure 1 – All external connections
3
1
2
4