SEA 235, Operator'S Manual

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REAR PANEL
95
REAR PANEL CONNECTIONS
POWER CONNECTOR
:
Connect to a power supply that delivers 12 volts DC and is capable of 30 Amps
intermittent current.
RF CONNECTOR
:
Type UHF female connector for interconnecting a 50 ohm coax to the antenna
system. Coax type should be RG-58C/U, RG-213/U or equivalent using a
PL-259 UHF plug.
SEABUSS INTERFACE - P1 :
Interconnect for connecting the optional SEA 2350 remote controller(s).
Standard SEABUSS interconnect cable is used and up to 150 feet (50 meters) of
cable is permitted between the SEA 235 and the SEA 2350 controller(s).
Pins 1 and 9 - System common ground. Used for DC power return and
termination of shield braids.
Pin 2 - 13.6S terminal. Switched 13.6 volts from the transceiver to controller.
Pin 3
- PTT line for radiotelephone. Connecting this terminal to ground places
the radiotelephone in transmit.
Pins 4 and 5 - Balanced data lines. Approximately RS485 format,
differential logic. Use a shielded, twisted pair.
Pins 6 and 7 - Balanced, bi-directional audio lines. Nominal audio level is
approximately 1 volt peak-to-peak. Use a shielded twisted pair.
Pin 8 PWR buss. This is the ON-OFF control line from the controller to the
radiotelephone power control circuitry. Momentarily grounding this line will
“toggle” the power control circuitry in the SEA 235 to the opposite state.
DB-9 COMPUTER INTERFACE - P2 :
A 6-pole dip switch, located inside the SEA 235 on the mainboard, is used to
disconnect all lines EXCEPT the RS232 serial connections when operation with
a computer is intended. When the switches 2 through 5 are in the ON position,
the DB-9 connector is configured as an RS232 based SEABUSS interface and is
compatible with E-Mail systems like GLOBELINK and PINOAK DIGITAL.
The default switch position for all switches is OFF .
Pin 1 - Internal switch ON allows the radio to be turned ON and OFF when a
momentary ground is applied. (SW1-1).
Pin 2 - RXD Serial data RECEIVER pin for RS232 port.
Pin 3 - TXD Serial data TRANSMITTER pin for RS232 port.
Pin 4 - Internal switch ON allows the radio to go into transmit when a ground
is applied. (SW1-4).
Pin 5 - RS232 port ground pin.