POSIFLEX Business Machines PP3000 manual Serial Interface, Peripheral Unit Drive

TM

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.

CHAP. 5 MAIN …

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
			Supplies a low trigger pulse to drive the circuitry L1
2	L1 Drive	O	with a diode protection. This shall not be driven
			together with L2 at the time.
			To connect through diode and resistor to +24VDC
3	SW Sense	I	to detect the status of cash drawer open detection
			switch.
4	+24 V DC	O	Connected to +24VDC supplied by the printer.
			Supplies a low trigger pulse to drive the circuitry L1
5	L2 Drive	O	with a diode protection. This shall not be driven
			together with L2 at the time.
6	GND	O

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