LD2103 V3.0 Page 9 of 33
SRT Marine
Instruction Manual
SRT-MTB
©
Class B Marine AIS
Power Cable (or Power and Data Cable)
GPS Antenna Cable
VHF Antenna Cable
Installing the TRANSAS AIS CLASS B unit
WARNING:
Do not connect the TRANSAS AIS CLASS B unit to a mains (line) AC electrical supply, as an electric shock or
fire hazard could result.
CAUTION:
Do not connect the TRANSAS AIS CLASS B unit to a DC supply exceeding 15.6 V or reverse the supply
polarity. Damage to the unit may result.
CAUTION:
The TRANSAS AIS CLASS B unit is designed for operation in the temperature range -25 °C to +55 °C. Do not
install (or use) the TRANSAS AIS CLASS B unit in environments which exceed this range.
CAUTION:
Do not install the TRANSAS AIS CLASS B unit in an environment where it can be subject to excessive
exposure to water.
Electrical connections
Warning:
Only the RF, data and power cables provided with the TRANSAS AIS CLASS B unit should be used to connect
antennas, power and display devices so as to maintain the integrity of the enclosure.
Please see the drawings section of this manual for details of the power, data and RF cables supplied.
Remove the top of the transponder unit (eight screws) as shown.
Using the two co-axial leads supplied connect the down-lead from a VHF antenna to the VHF antenna port and connect the
down-lead of a GPS antenna to the GPS antenna port. Please see Appendix A for recommendations on antennas and antenna
installation.
If an external display unit (chart plotter, PC etc)
is to be used connect the supplied power and
data interface cable to the Power / NMEA port.
If an external display unit is not to be used
connect the supplied power only interface cable
to the Power / NMEA port.
Locate the RF, power and/or data cables into
the rubber grommets pushing them firmly to the
base of each slit. Each cable is pushed into the
grommet slit which lies directly in front of the
connector the cable is connected to.
Replace the top of the transponder unit taking
care to seat the cable grommets and the lid
seal correctly. Do not over-tighten the fixing
screws.
If an external display unit is to be used (such as
a chart plotter, PC serial terminal or other
display device) connect the user end of the
data interface cable to the display device. Note
that the software in the display device must be
configured for AIS operation AND to accept
standard Class B operation NMEA sentences.
This external display unit software is not part of
the TRANSAS AIS CLASS B transponder
package.
Connect a 12V DC supply (9.6-15.6V) capable
of supplying 2A peak to the DC power lead
(brown/red = positive, black/blue=negative).
The case of the unit is not isolated from the negative terminal of the supply and therefore it is recommended that the
