Appendix A: Electrical Pin Descriptions
INSTALLATION AND USER GUIDE
33
ISA module: Serial Port
The
ISA
module’s
serial
port
connector
is
configured
to
look
like
a
standard
9
‐
pin
“DCE”
serial
port.
In
comparison,
a
typical
PC
computer
would
have
a
9
‐
pin
“DTE”
serial
port.
Therefore,
in
most
applications
a
straight
through
serial
cable
(DB9
‐
Male
‐
to
‐
Female)
is
used
to
connect
the
controlling
device
to
the
transmitter.
On
the
receive
side,
generally
a
null
‐
model
cable
will
be
required.
However,
check
the
user
‐
guide
for
your
equipment
before
connecting
any
cables.
The
following
figure
shows
the
serial
‐
port
pinout
for
the
ISA
module.
Note:
Both
the
transmitter
and
receiver
use
the
same
ISA
module.
Therefore,
you
will
likely
need
a
null
‐
modem
or
gender
‐
adapter
cable
at
one
end
or
the
other.
Figure
5.
Voyager
RS232
DB9
‐
Female
Connection
The
following
table
describes
the
ISA
module’s
serial
‐
port
pinout.
Note
that
this
port
is
designed
as
a
“DCE”
device.
Therefore,
a
straight
‐
through
cable
would
be
used
when
connecting
to
a
PC
(for
example,
which
is
a
“DTE”
device).
Table
16.
RS232
serial
‐
port
pinout
Pin
Signal
name
Direction
1
DCD
Data
Carrier
Detect:
output
from
ISA
module.
2
RX
Receive
‐
data:
output
from
ISA
module.
3
TX
Transmit
‐
data:
input
to
ISA
module.
4
DTR
Data
Terminal
Ready:
input
to
ISA
module.
5
Ground
Signal
common
(ground).
6
DSR
Data
Set
Ready:
output
from
ISA
module.
7
RTS
Request
to
Send:
input
to
ISA
module.
8
CTS
Clear
to
Send:
output
from
ISA
module.
9
RI
Ring
Indicator:
output
from
ISA
module.
DB9-F
Serial Port