98-141779-G 4-1
Chapter 4
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Interfaces 4
This chapter has the following sections:
• Interfaces of the ACU
• Interfaces of the modem
4.1 Interfaces of the ACU
4.1.1 LEDs, display, keypad and connectors
The following figure shows the LEDs, display and the keypad of the ACU. For an explanation
of the texts in the display see ACU display and keypad on page 6-38.
The following figure shows the connector panel of the ACU.
The connector LAN on the front panel is typically connected to the service port at LAN3
with a straight Ethernet cable. Then you can access the service port from the front of the
ACU.
Figure 4-1: ACU: LEDs, display and keypad (detailed, example)
Main NAV:GH MDM: NETOK LAN: 1 – 3 4
TRACKING
6$7:5;/+7;0$5
Figure 4-2: ACU (connector panel) with AC power
LAN 3 (Service) to front
Tx In
Rx Out
Ground
LAN 1-4
LAN 1 + 2: Modem control
RS-422 NMEA
AC Power
RS-232
Antenna
ACU
Fuse 7AT/SB
Type label
Connect the Ethernet cable between LAN 3 and LAN to provide connection
to the service port (LAN connector) at the front of the ACU.
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