Compuprint 914 User Manual page 138

Appendix C
This table lists the RS-232/C interface signals (Data RDY/BSY System):
Signal Pin
Name Number
FRAME 1
GND
TXD 2
RXD 3
GND 7
ERROR
DTR 20
This table lists the RS-232/C interface signal (XON/XOFF System):
Signal Pin
Name Number
F R A M E 1
GND
TXD 2
RXD 3
RTS 4
CTS 5
C.6
Source
Local
Connect.
PRT
HOST
-
14 -
PRT
Source
Local
l onnect.
PRT
HOST
PRT
HOST
A78401745-001
Description
R e m o t e
Connect.
- The printer is shipped
with pin 1 connected to
th e
(protective ground).
PRT Not used.
D A T A Receive data.
SET
- This pin is the common
ground signal.
PRT
Active LOW level.
Indicates that the printer
is disabled because of a
paper out condition or
printer malfunction.
PRT Normally HIGH (ON).
With hardware data flow
selected.
Description
R e m o t e
Connect.
- The printer is shipped
with pin 1 connected to
the
(protective ground).
PRT Used to transmit data
DATA Used to receive data.
SET
PRT Active HIGH (ON) level
signal. It is held ON
un til the printer is
disconnected.
DATA Active HIGH (ON) level
SET signal. Indicates that
the host or data set is
ready to receive data
from the printer.
frame ground
frame ground