Kantronics KPC-2 - Connecting Your Radios; DB-9 Radio Connector Pinout

DB-25 Connector
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Male (Looking at Pins) Female (Looking at Holes)
DB-9 Connector
(010101010) (010101010)
(0101010) (0101010)
Male
(Looking
at
Pins)
Female
(Looking
at
Holes)
TNC (DCE) Prewired RS-232
Pin
DB-25
DB-9
Cable
Computer
(DTE)
Name Pin No. Pin No. Color direction DB-25 9
FG*
1
N/A
black
====
1
N/A
TXD
2
3
white
<===
2
3
RXD
3
2
red
===>
3
2
SG*
7
5
orange
====
7
5
p
^
RTS
4
7
green
==
4
7
CTS
5
8
brown
===
5
8
DCD
8
1
yellow
===>
8
1
DSR
6
6
blue
===>
6
6
DTR
20
4
purple
<===
20
4
mark
11
(KAM)
To
external
scope,
if
desired
space
18
(KAM)
To
external
scope,
if
desired
test
18
(KPC-2)
DO
NOT
CONNECT
TO
COMPUTER
+12V
25
DO
NOT
CONNECT
TO
COMPUTER
*
FG
(Frame
Ground)
and
SG
(Signal
Ground)
are
tied
together
in
the
TNC.
The
shield
is
on
pin
1
of
the
DB-25
and
on
pin
5
of
the
DB-9.
The
black
wire
is
not
connected
in
the KPC-4 serial cable.
The
functions
of
these
lines
are
explained
below.
DB-25
Pin
2
TXD
DB-9
Pin
3
Transmit
Data.
This
line
is
the
serial
data
from
the
terminal
which
is
to
be
transmitted
to
the
other
station
by
the
TNC.
It
is
this
line
which
is
used
for
all
communication
from
your
terminal
to
the
TNC,
including
commands.
DB-25
Pin
3
RXD
DB-9
Pin
2
7
١
Receive
Data.
This
line
is
used
by
the
TNC
to
send
the
data
it
receives
from
the
other
station
to
your
terminal.
This
line
is
also
used
to
send
TNC
messages
to
your
terminal.
©
Copyright
1989,
1991,
Kantronics,
Inc.
All
Rights
Reserved.
,
Duplication
of
this
manual
or
the
firmware
without
Sept.
12,
1991
Version
3.0
permission
of
Kantronics,
Inc.
is
prohibited.
Installation
Manual
سس سح