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Training, Installation & Service Manual - Livewire Connections Ltd

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Interfaces of the SAILOR 900 VSAT ACU<br />

4. IIHDT (Integrated Instrument)<br />

5. HCHDT (Magnetic compass)<br />

Recommended NMEA 0183 cable:<br />

Two-wire constructed with one enclosed shield<br />

Network signal pair:<br />

• Size: No. 24 AWG (0.24 sq. mm) or heavier<br />

• Characteristic impedance: 95 - 140 Ohm<br />

• Propagation delay: 5 nanoseconds per meter, maximum<br />

• 15 Twists (minimum) per meter<br />

4.1.9 RS-232 and RS-422 connectors<br />

These connectors are used to access and configure the connected<br />

VSAT modem and for ACU control. See the VSAT modem<br />

requirements for use of the RS-232 or RS-422 connector.<br />

Outline (on the ACU)<br />

Pin<br />

number<br />

Pin function<br />

1 Not connected<br />

6 9<br />

2 RXD<br />

3 TXD<br />

4 DTR<br />

1 5<br />

5 Ground<br />

6 DSR<br />

7 RTS<br />

8 CTS<br />

9 Receive Signal Strength<br />

Indicator<br />

Table 4-5: RS-232 connector, male, outline and pin assignment<br />

4-6 Chapter 4: Interfaces 98-133966-E2

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