Raveon RV-M7-UC-GX Quick Start Manual page 5

5. RS232 Serial I/O Connector
The RS232 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
directly into a computer or PC's 9-pin COM port.
Front-view of DB-9 connector on modem (female)
Pin Name Dir Function
1 CD out Carrier
detect
2 RxD out Receive
data
3 TxD in Transmit
data
or
IN2
4 DTR in Data
terminal
ready
or
IN0
5 GND Ground
connection
out
Data Set
6 DSR
Ready
in
Request to
send
7 RTS
or
IN1
out
Clear to
8 CTS
send
In/o DC power
9 Power ut (not ring
signal)
Note: RS-232 signals use positive and negative voltages to represent digital 1s
and 0s. A positive voltage is a 0, and a negative voltage is a digital 1.
M7 GX Quick Start Guide
Level / Specification
Indicates presence of carrier. Logical 0
means carrier is present. If disabled, it is
asserted (0). It will be a 1 when the
modem is in the configuration mode.
Data out of the modem.
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.
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.
Signal and power ground
Normally is set to 0 when modem is
powered on and running. Modem sets to
a 1 when in low-power mode.
Used to stop/start the flow of data out TxD
pin. 0 = OK, 1 = don't send.
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.
Used to stop the flow of data going into
the RxD pin from the device connected to
the M7. 0 = OK to send, 1 = don't send. If
the M7 cannot accept more data, it will
negate this signal (set to a 1).
User may supply the DC power to the
modem on this pin.
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Raveon Technologies Corp.