LLZ 421
Operation and Maintenance Installation
ILS 420
2−17Ed. 01.04
SOAC
2.4.4.3 LGM2/DME (J23)
SubD,9pin, male, from connector J3 or J1 BP−Digital
J3 = Modem output
PIN ASSIGNMENT PIN ASSIGNMENT
1 La 6 DSR
2Lb 7RTS
3A2 8CTS
4B2 9RI
5 GND
J1 = TTL/RS232 (direct)
PIN ASSIGNMENT PIN ASSIGNMENT
1 DCD 6 DSR
2RXD 7RTS
3 TXD 8 CTS
4DTR 9RI
5 GND
J1 = RS422 (direct)
PIN ASSIGNMENT PIN ASSIGNMENT
1 TXD+ 6 RXD+
2 TXD− 7 RXD−
3 not used 8 not used
4 not used 9 not used
5 not used
2.4.4.4 COM4/NDB (J22)
SubD, 9pin, female, from connector J14 BP−Digital
J14 = TTL/RS232 (direct)
PIN ASSIGNMENT PIN ASSIGNMENT
1 DCD 6 DSR
2RXD 7RTS
3 TXD 8 CTS
4DTR 9RI
5 GND
J14 = RS422 (direct)
PIN ASSIGNMENT PIN ASSIGNMENT
1 TXD+ 6 RXD+
2 TXD− 7 RXD−
3 not used 8 not used
4 not used 9 not used
5 not used
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