Interfaces of the FV-110 ACU
3-4
Recommended NMEA 0183 cable:
Two-wire constructed with one enclosed shield
Network signal pair:
• Size: No. 24 AWG (0.24 sq. mm) or heavier
• Characteristic impedance: 95 - 140 Ohm
• Propagation delay: 5 nanoseconds per meter, maximum
• 15 Twists (minimum) per meter
3.1.6 RS-232 and RS-422 connectors
Use these connectors to connect the ACU to the VSAT modems with serial interfaces. See
Interfaces of the VMU on page 3-5 for further details about the RS-232 or RS-422
connector.
Outline (on the ACU) Pin Pin function
1 Not connected
2RXD
3TXD
4DTR
5Ground
6DSR
7RTS
8CTS
9 Receive Signal Strength
Indicator
Table 3-4: RS-232 connector, male, outline and pin assignment
Outline (on the ACU) Pin Pin function
1Ground
2Line A RXD (+)
3Line B TXD (+)
4Ground
5Ground
6 Not connected
7 Line A RXD (-)
8Line B TXD (-)
9 Not connected
Table 3-5: RS-422 connector, male, outline and pin assignment
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General