Lars Thrane LT-300, Руководство пользователя и инструкция по установке

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LT-300 User & Installation Manual Connecting
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NMEA 2000 Installation
The LT-300 GNSS Receiver is delivered with a NMEA 2000 screw-in connector, which is used to interconnect
the communication cable to a NMEA 2000 backbone. The LT-Service Tool can be used to configure the LT-
300 GNSS Receiver to either ‘Open’ or ‘Terminated’, see Configuration using LT-Service Tool on page 26
(factory default: ‘Open’). Figure 36 and Figure 37 are illustrating two options for connecting the LT-300 GNSS
Receiver to a NMEA 2000 network (backbone).
NMEA 2000 (‘Open’)
If the LT-300 GNSS Receiver is installed as illustrated in Figure 36, no internal LT-300 NMEA 2000 bus
termination is required (default: ‘Open’). The LT-300 GNSS Receiver is connected to the NMEA 2000
backbone using a drop-cable.
IMPORTANT: Make sure that the communication cable, delivered together with the LT-300 GNSS Receiver,
is shortened to a maximum length of 6 meters as defined in the NMEA 2000 standard for a
drop cable.
NMEA 2000 (‘Terminated’)
If the LT-300 GNSS Receiver is installed as illustrated in Figure 37, internal LT-300 NMEA 2000 bus
termination is required and configuration must be changed from ‘Open’ to ‘Terminated’ (default: ‘Open’).
The LT-Service Tool must be used to make this configuration, see Configuration using LT-Service Tool on page
26. The LT-300 GNSS Receiver is connected to the NMEA 2000 backbone using a standard backbone cable.
For details on how to connect the communication cable with the NMEA 2000 screw-in connector, see
Connecting to NMEA 2000 on page 22.
F
IGURE
36: LT-300 GNSS R
ECEIVER CONNECTED TO A
NMEA 2000 BACKBONE
CONFIGURED TO
‘
OPEN
’
(
DEFAULT CONFIGURATION
). T
HE
NMEA 2000
SCREW
-
IN CONNECTOR IS NOT ILLUSTRATED IN THIS FIGURE
.
Drop Power
Cable (+ / GND)
Ter.
Power-source
NMEA 2000
Device
LT-300
GNSS
Ter.
F
IGURE
37: LT-300 GNSS R
ECEIVER CONNECTED TO A
NMEA 2000 BACKBONE
WITH
NMEA 2000
BUS TERMINATION
CONFIGURED TO
‘
TERMINATED
’. T
HE
NMEA 2000
SCREW
-
IN CONNECTOR IS NOT ILLUSTRATED IN THIS FIGURE
.
Drop Power
Cable (+ / GND)
Ter.
Power-source
NMEA 2000
Device
LT-300
GNSS
Cable length ≤ 6 m.
(20 ft.) according to
the NMEA 2000
standard
Cable length ≤ 100 m.
(328 ft.) according to
the NMEA 2000
standard