Connection to vrm650/vrm660 radio, Connection to conventional astro radio – Motorola 68P02958C00-B User Manual
Page 269
APPENDIX A:
RS232 Adapter Cables
A-3
Connection to VRM650/VRM660 radio
To connect the RTU (via Port 2 or Port 3) to a VRM650/VRM660 radio, you should use the
FKN4895A adapter, which ends with the male 9-pin, D-type connector. The port should be
defined as RS232, Async, External Modem, RD-LAP, RTU (LineX).
RS232 Function
8-pin Connector
(on RTU)
9-pin Male
Direction
TX-DATA
1
→
3
from RTU
RX-DATA
2
←
2
to RTU
CTS
3
←
8
to RTU
GND
4
5
-
CD (Rec line)
5
←
1
to RTU
RTS
6
→
7
from RTU
DTR
8
→
4
from RTU
Connection to Conventional Astro radio
To connect the RTU (via Port 2 or Port 3) to a Conventional Astro radio, you should use the
FKN4905A adapter, which ends with the male 15-pin, D-type connector. The port should be
defined as RS-232, Async, SLIP, ASTRO SPECTRA, MDLC over IP.
RS232 Function
8-pin Connector
(on RTU)
15-pin Male
Direction
TX-DATA
1
→
13
from RTU
RX-DATA
2
←
11
to RTU
CTS
3
←
1
to RTU
GND
4
8
RADIO_GND/
EMERGENCY
-
DTR
8
→
15
from RTU