User manual

Page 8© 2013 Active Research Limited
Connecting a Custom Cable
It is possible to replace the supplied cables with custom cables for different applications. The cables are connected
inside the case using screw terminals so that it is easy to swap out the existing cable for one more suited to the
installation requirements. A spare cable gland is supplied for strain relief and splash proong.
Opening the NGW-1 Case
To open a NGW-1 case, remove the two screws in the
base of the unit, then carefully lift off the top of the case.
The cable glands must be slid out from the top of the case
in order to access the internal connections. Pulling the lid
off too roughly without sliding the glands out may damage
to the cable connections. The NGW-1 circuitry will be left
attached to the base of the unit and the two supplied
cables attached to their connectors.
Note: When opening an NGW-1 case, be aware that the
circuitry inside is not 100% protected against static
electricity. Please ensure that you use precautions against
static damage by only touching the connector block and
by holding the unit by its plastic base.
Note: Any damage caused to the unit while the case is
open is not covered by the guarantee.
CAN Network
NET COM
Shield
CAN Hi
CAN Lo
NET SUP
Figure 4 - NMEA 2000 PCB Connections
Custom NMEA 2000 Cable
Replacement NMEA 2000 cable is required to conform in
full to the NMEA 2000 specication and be no longer than
6 metres (maximum drop length).
Refer to “Figure 4 - NMEA 2000 PCB Connections” and
“Table 2 - NMEA 2000 Connection Table”.
Note: The colours given relate to the supplied Actisense
cable and the NMEA 2000 standard cable denition.
Wire Colour NMEA 2000 PCB Label
Shield/Screen Shield SHIELD
Blue Net Low NET LO
White Net High NET HI
Black Net Common NET COM
Red Net Supply NET SUP
Table 2 - NMEA 2000 Connection Table
Custom NMEA 0183 Cable
Ideally the cable should be a shielded twisted pair for both the input and output connections. The maximum length of the
cable is dependent on the input/output specications of the connected NMEA 0183 device and the cable quality. Using
an unsuitable cable may result in data loss. For wiring instructions refer to the diagrams for the relevant connection
option from those described from page 6 onwards.