Operation Manual
Serial Interfacing (RS-232C)
To construct a cable for
an
RS-232C serial configuration, you will
need:
• DB25P equivalent 25-pin plug, shell equivalent to DB-C2-J9.
• Beldon (or equivalent) SHIELDED cable with twisted
pair
conductors. Must
be
ULand
CSA approved.
The
cable MUST
be shielded.
• The
printer
has a 25-pin
DB-25S
receptacle.
Pin description
Pin
No.
Signal
Sym.
Direction
Description
1
I'RA\IE
GROU'\D
FG
-
Connectl>d to
printer
frame (frame
ground)
2 TRA'\SM11TED
TD
From Printer Serial
data
sign,11
DATA
transmitted from printer
~
RECEIVED DATA
RD
To
Printer
Serial
data
sign,ll
received
by
printer
4 REQUEST
TO
RTS
From
pnnter
Signal
to
indicate that
C'\ote
1)
SEND
the
printer
is not
ready
for receiving data in
Read
vI
Busy protocol
0 DATA SFT READY
DSR To
printer
Signal to notify
printer
{l'\ote2)
that transmitter is
ready
for transmission
Printer
receives data
after confirming this
signal
as
a HIGII
7 SIGJ\'AL GROUJ\;D SG -
Signal
ground
11
SUPERVISORY
SSD
From
printer
Signal to indica
!I.'
that
the
SE!'\DDATA printer is
not
ready
for
receiving
data
in
Ready
I Busy protocol
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