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Installation Manual

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AIS Installation Manual Issue 1 27
6.4.10 MAIN port
Three twisted pairs, shielded, PVC sheathed.
For lengths to 200 meters, use 0.22 mm
2
(7/32); Belden 8104 or equivalent
Main port wire connection
The twisted pairs shall be assigned as (RxA/RxB), (TxA/TxB) and (RxCom/TxCom).
6.4.11 AUX/Pilot port
Three twisted pairs, shielded, PVC sheathed.
For lengths to 200 meters, use 0.22 mm
2
(7/32); Belden 8104 or equivalent
6.4.12 Pilot Plug connection
The Pilot Plug is designed to be connected to the Display. The Plug supplied with the AIS
system has the connector fitted, and needs only to be fixed and plugged in.
6.4.13 Long Range Port
The AIS Long-Range Function requires a compatible long-range communication system e.g.
Inmarsat-C. If this is available, a connection to the Inmarsat-C system can be made. It is
required that the Inmarsat-C input/output port can be interfaced using IEC 61162-2 and
understand the long-range sentences as required by IEC 61993.
Recommended cable for connection of Long Range port:
Three twisted pairs, shielded, PVC sheathed.
For lengths to 200 meters, use 0.22 mm
2
(7/32); Belden 8104 or equivalent
The twisted pairs shall be assigned as (RxA/RxB), (TxA/TxB) and (RxCom/TxCom)
6.4.14 RTCM port, Differential GNSS correction input/output port
The RTCM-port is the input port for differential correction. The AIS Transponder can receive
differential correction in two ways:
• The RTCM port can be connected to a DGNSS unit. The DGNSS unit will then provide
differential correction to the AIS Transponder through the RTCM port.
• Through message 17 transmitted from a base station. The RTCM port will then work as
an output port, which can supply differential correction in RTCM format to other units.
Recommended cable for connection of RTCM-port:
Three twisted pairs, shielded, PVC sheathed.
For lengths to 200 meters, use 0.22 mm
2
(7/32); Belden 8104 or equivalent
RTCM port wire connection
The twisted pairs shall be assigned as (RxA/RxB), (TxA/TxB) and (RxCom/TxCom)
6.4.15 Alarm relay
The AIS requires that an alarm output (relay) be connected to an audible alarm device or to the
ship’s alarm system, if available.
If any failure or malfunction is detected that will significantly reduce integrity or stop operation of
the AIS, an alarm is initiated. In this case:
• An alarm message is displayed on the display unit
• The alarm relay is activated
• The transponder health status LED turns off