4. connectors and signals – Rice Lake Star DP8340 Dot Matrix - User Manual User Manual
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7-4.
Connectors and Signals
Pin No.
Signal
Direction
Function
Name
1
GND
—
Shield Ground
2
GND
—
Frame Ground
3
TXD
OUT
This pin carries data from the printer.
(Return channel)
4
RXD
IN
This pin carries data to the printer.
5
RTS
OUT
This is SPACE when the printer power is ON.
6
FAULT
OUT
This is MARK when the printer is abnormal.
(Machine Error.) Or there is a paper error.
7
GND
—
Signal ground.
8
DTR
OUT
This printer turns this pin SPACE when
it is ready to receive data.
Figure 7-3. Modular Jack Connector
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