Version C16. February 2013
Raveon Technologies Corporation
Company Confidential
14
The
RV-M7
modem is supplied with a 6-foot DC power cable, Raveon part number
1C738-1.
Note
: The RV-M7 has in internal 3-amp mini-fuse (automotive type) to protect it
and its power source against reverse voltage and serious hardware failures. In the
event it is blown due to a reverse voltage, it may be replaced by removing the
internal circuit board and replacing the fuse. This must be done by a qualified
electronic technician using ESD precautions.
4.3.
RS-232/EIA232 Serial I/O Connector
The RS-232 9-pin serial I/O connector is a female 9-pin D-subminiature connector
having the following pins configuration. It is pinned out so that it may be plugged
di
rectly into a computer or PC’s 9-pin COM port.
Front-view of DB-9 connector on modem (female)
Pin
Name
Dir
Function
Level / Specification
1
CD
out
Carrier detect
If enabled, indicates presence of carrier. Logical 0 (+
voltage on RS-232) means carrier is present. If disabled,
it is asserted (0) whenever the modem is operational, and
not in the configuration mode. It will be a 1 when the
modem is in the configuration mode.
2
RxD
out
Receive data
Data out of the modem.
3
TxD
in
Transmit data
or
IN
2
Data into the modem.
Also used as digital input IN2 for exception reporting.
GND or floating for a 0, >3V for digital 1. If enabled for
digital inputs, the serial data entering this pin is ignored
(except in the command mode). Use the TRIGBITS
command to set which bits are used as inputs.
4
DTR
in
Data terminal
ready
or
IN
0
Normally ignored by the
RV-M7
modem. May control the
power-state of the modem in low-power mode if this
feature is enabled.
Also used as digital input IN0 for exception reporting.
GND or floating for a 0, >3V for digital 1. Use the
TRIGBITS command to set which bits are used as inputs.
5
GND
Ground
connection
Signal and power ground
6
DSR
out
Data Set
Ready
Normally is set to 0 when modem is powered on and
running. Modem sets to a 1 when in low-power mode.
7
RTS
in
Request to
send
or
IN
1
Used to stop/start the flow of data coming out of the
modem TxD pin. 0 = OK to send, 1 = don’t send. Leave
disconnected if not used.
Also used as digital input IN1 for exception reporting.
GND or floating for a 0, >3V for digital 1. Use the
TRIGBITS command to set which bits are used as inputs.
8
CTS
out
Clear to send
Used to stop the flow of data going into the RxD pin from
the device connected to the
RV-M7
. 0 = OK to send, 1 =
don’t send. If the
RV-M7
cannot accept more data, it will
negate this signal (set to a 1).
9
Power
In/out
DC power
User may supply the DC power to the modem on this pin.