Installation Manual

89-041 Section 4 Issue 5 S4-1
4 - Electrical connections
This installation guide takes into account the IMO “Guidelines for installation of Shipborne
Automatic Identification System”. However both the IMO publication and these instructions must
be taken as guidance only; individual circumstances must take precedence.
This guide is concerned only with the installation of the UAIS transponder unit and does not
cover the installation of any peripheral equipment connected to the transponder. For proper
installation and connection of peripheral equipment to the transponder refer to the installation
manual for these products.
Connection Must connect Optional
24.0 VDC power supply Yes
GNSS antenna Yes
VHF antenna Yes
Display system (VDU) Yes
Pilot plug Yes
Alarm Relay Yes (if available)
ECDIS (Main port) Yes
ARPA (Main port) Yes
Long range function Yes
RTCM, differential GNSS info. Yes
Position Yes
Heading Yes
Rate of turn Yes
Speed and Course Yes
Installation kit (optional)
This installation kit comprises the following:
Item Quantity
Power Cable, 2.5mm 2-core flex 20m
VHF antenna cable, RG214 Coax 30m
GPS antenna cable, RG58 Coax 30m
Signal cable, 0.5mm 4 twist pair + drain 60m
Cable tie 200
Cable marker 20
Crimp tool 1
Tape, self-amalgamating 2 reels
Signal cable connections for UAIS Transponder
As shown in the table above, the UAIS Transponder must be or may be connected to different
types of peripheral units; these can be divided in three groups:
• Coax connection to the antennas
• signal cable connection to the sensors (GNSS, Gyro, Log)
• signal cable connections to the five-input/output ports (Main, AUX/Pilot, long-range,
RTCM, Display)
Connecting the three types of interfaces is described in detail in the following chapters.
The signal connections are all connected via a serial RS422 type interface; baud rates are from
1200 to 38400.
In some cases, particularly in retrofit installations, it may not be possible to connect the UAIS
directly to the required sensor, because some sensors do not provide the IEC 61162-2 (NMEA)
sentences required by the UAIS unit. In such cases a protocol converter is required between the
sensor and the UAIS unit. Converters are available from different manufacturers, either as direct