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Serial
Communications
PT12
Manual
7/20/2021
Page
38
of
48
Signal
PT12
(9pin)
Direction
Computer
(9pin)
1
1
*
TxD
2
2
*
RxD
3
3
DSR
4
4
*
GND
5
--
5
DTR
6
6
CTS
7
7
RTS
8
8
9
9
*
Denotes
a
required
connection.
All
others
are
optional.
SERIAL
CONFIGURATION
To
communicate
with
the
PT12,
the
computer
should
be
set
to
the
following
parameters.
Baud
Rate
115200
Data
Bits
8
Stop
Bits
1
Handshaking
None
5.1.2
USB
TO
SERIAL
PORT
The
USB
type
B
host
port
is
used
for
connecting
the
PT12
to
a
PC
without
the
need
of
an
external
RS
‐
232
to
USB
converter.
The
device
will
show
up
on
a
PC
as
a
serial
port
and
will
need
to
be
configured
with
the
same
serial
settings
as
the
RS
‐
232
connection
(above).