Serial interface, Peripheral unit drive – Mustek PP3000 User Manual
Page 45
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TM
CHAP. 5
MAIN …
Serial Interface
9 pin Female D-sub connector
Pin
#
Signal Name
I/O Function
1
DCD
O
Data carrier detect
2
TXD
O
Transmit data
3
RXD
I
Receive data
4
N.C.
5
GND
Ground
6
RTS
O
Request to send. This is always “SPACE” when the
printer is turned on.
7
N.C.
8
DTR
O
Data terminal ready. This signal changes to
PACE” when the printer is ready to receive data.
9
N.C.
Peripheral Unit Drive
6 pin telephone jack
Pin
#
Signal Name
I/O Function
1
Chassis GND
To connect the shield of cable between printer and
the peripheral device
2
L1 Drive
O
Supplies a low trigger pulse to drive the circuitry L1
with a diode protection. This shall not be driven
together with L2 at the time.
3
SW Sense
I
To connect through diode and resistor to +24VDC
to detect the status of cash drawer open detection
switch.
4
+24 V DC
O
Connected to +24VDC supplied by the printer.
5
L2 Drive
O
Supplies a low trigger pulse to drive the circuitry L1
with a diode protection. This shall not be driven
together with L2 at the time.
6
GND
O