Smiths Kelvin Hughes Nucleus 3 5000 Series, Системный справочник

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DED I CATED SE RIAL INPUTS
The I/O PCBs have a dedicated Serial Trackerball input
PLH, for either standard KH type desk top mouse systems
trackball or Ergopod or MISC connections for
multi-Ergopod installations.
Connections are via connector PLH, with pinouts as
specified below.
Pin Description
1
+5V
2 +12V
3
Receive Data input - RS232
4 Local GND
SE RIAL IN PUT SETUP
The serial messages received can be individually
configured for:
1 Input port(s) received on. Data can come from several
sources, i.e. Ownship position from GPS or ECDIS on
two or more input ports.
2 Baud Rate of a specific input port. Not all peripheral
devices are at standard 9600 baud. The input and
output baud rate of a specific port should be kept the
same, i.e. 9600 input and 9600 output.
3
Strict/Relaxed NMEA message checking. Not all
peripheral devices provide correct messages.
4 Priority assignment. Radar uses message from Port 1
(i.e. ECDIS) in preference to message from Port 2 (i.e.
GPS).
5 Timeout for received message. A period can be
specified for the Radar to switch to another source (if
available).
6 Send Time. The update frequency for passing data on
to the Radar (i.e. Input at 5Hz, but only passed on at
1Hz).
July 03 8aA.2 Amdt 5
KH 2020
Chap 8a - Annex A
5K
MAX232
Listener Input
Impedence > 3K
CD-0227
Figure 1. Simplified Other Ports Listener Circuit
SFH6156-2
Listener Input
Impedence > 500R
CD-6010
470R
Figure 2. Simplified NMEA Port Listener Circuit
+5V
MAX
238
RS232
Data Out
TTL In
400k
W
CD-2387
Figure 3. Simplified NMEA Port Talker Circuit