Kantronics KPC-2 - 8-Pin DIN Radio Connector for KAM HF

118-25
Pin
7
and
1
SG
DB-9
Pin
5
Signal
Ground.
This
line
establishes
the
common
reference
potential
for
all
circuits
except
Protective
Ground.
DB-25
Pin
4
RTS
DB-9
Pin
7
Request
To
Send.
This
line
tells
the
TNC
that
the
terminal
is
ready
to
receive
data.
An
ON
level
tells
the
TNC
it
may
send
data
while
an
OFF
level
tells
it
to
stop
sending
data.
If
the
terminal
for
any
reason
is
unable
to
accept
data
from
the
TNC,
it
will
cause
this
line
to
change
to
an
OFF
state,
providing
that
the
terminal
supports
hardware
flow
control.
For
instance,
buffer
is
full,
terminal
is
turned
off,
and
so
on.
DB-25
Pin
5
CTS
DB-9
Pin
8
Clear
To
Send.
This
line
is
used
by
the
TNC
to
tell
the
terminal
whether
or
not
it
may
send
data
to
the
TNC.
An
ON
level
tells
the
terminal
it
may
send
data
while
an
OFF
level
tells
it
to
stop
sending
data.
This
pin
is
the
complement
to
the
RTS
pin,
implementing
hardware
flow
control
in
the
other
direction.
DB-25
Pin
8
DCD
DB-9
Pin
1
Data
Carrier
Detect.
This
line
is
an
output
from
the
TNC
indicating
connected
status
of
the
TNC.
When
a
connection
exists
on
the
current
stream,
this line
will
be
true.
(When
using
TTL
levels,
DCD
at
+5
volts
indicates
connected
status.)
This
pin
has
no
function
in
the
KPC-1.
DB-25
Pin
6
DSR
DB-9
Pin
6
Data
Set
Ready.
Some
terminal
programs
look
at
this
pin
to
see
that
the
TNC
is
operating
before
allowing
you
to
talk
to
the
TNC.
This
pin
is
pulled
true
and
is
common
with
DTR,
as
shipped
from
the
factory.
In
the
KPC-1
DSR
is
jumpered
to
DTR
and
is
not
connected
to
any
internal
circuitry.
DB-25
Pin
20
DTR
DB-9
Pin
4
Data
Terminal
Ready.
This
pin
is
common
with
DSR
in
the
TNC.
The
TNC
assumes
the
terminal
is
operating
and
does
not
require
the
terminal
to
pull
this
pin
true.
This
pin
may
be
isolated
from
DSR
if
desired.
In
the
KPC-1
DTR
is
jumpered
to
DSR
and
is
not
connected
to
any
internal
circuitry.
DB-25
Pins
11/18
Mark/Space
KAM
ONLY
Mark/Space.
These
signals
are
available
for
connecting
an
external
scope
if
desired.
Refer
to
the
Scope
Monitoring
section
for
instructions.
.DB-25 Pin 18 Test
KPC-2 ONLY
Processor
Test
Input.
This
is
used
by
factory
personnel
only
in
repair
and
service
operations.
UNDER
NO
CIRCUMSTANCES
should
you
connect
this
pin
to
your
terminal
or
computer
output
port.
DB-25
Pin
25
Plus
12
Volts
KAM,
KPC-2
and
KPC-2400
+127
This
is
an
alternate
input
pin
for
supplying
power
to
the
TNC
if
desired.
If
the
normal
+12
VDC
input
jack
is
used,
this
pin
will
be
HOT.
BE
CERTAIN
THIS
PIN
IS
NOT
CONNECTED
TO
YOUR
COMPUTER.
.
©
Copyright
1989,
1991,
Kantronics,
Inc.
All
Rights
Reserved.
2
M
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12,
1
Duplication
of
this
manual
or
the
firmware
without
nstallation
Manua
permission
of
Kantronics,
Inc.
is
prohibited.