NavCom SR-7120 Rev.A - Manual (Page 19)

Safari Network User Guide
1-7
Radio Modules (NCU, SCU, and RU)
All radio modules have the same form factor for
convenient mounting; however, the internal configuration
differs. The radio is typically mounted outside and
preferably as high as possible to provide the best
coverage. Its chassis is fully sealed and protected to
withstand harsh environments. A plastic radome is
provided to protect the radio and optional GPS antennas
against impact. The radome can be removed when
externally mounted antennas are required.
Each radio supports four communication ports (COM1 to
COM4). Interface to the radio is through two rugged 12-
pin connectors J1 (COM3) and J2 (COM1 & COM2), as
shown in Figure 1-1 on page 1-6.
The radio is available in two different models
Model # 1 with COM1 set as Ethernet
Model # 2 with COM1 set as Serial
COM1 Serial Mode possible configurations are:
RS 232 ASYNC
RS 422 ASYNC
RS 422 SYNC
COM2 Serial Mode possible configurations are:
RS 422 ASYNC
RS 422 SYNC
COM3 Serial Mode possible configurations are:
RS 232 ASYNC
TTL ASYNC for internal GPS Engine interface.
COM4 is dedicated for a CAN Bus interface.