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10
Signal
name
PIN
Assignme
nt
Source
Explanation
TXD
2
Printer
Printer sends data to host
RXD
3
Host
Printer receives data from
host.
CTS
8
Printer
Flow control signal of
printer and hardware of
host (BUSY signal)
DRS
6
Pinter
Same with CTS
GND
5
-
Picture 3-5 PIN Assignment of serial port
Notice:
①
”Source” means where the source data comes from.
②
Non-listed pin No. is empty pin.
③
232 electrical level is negative logic. Negative electrical level
means data 1; while positive electrical level means data 0.
When the electrical level is 485, the definition of pins is as showed in
Picture3-6:
Signal
name
Pin No. of IDE20
Socket
Pin No. of
IDEC10Socket
(COM 1)
A
20
7
B
19
9
GND
2,6,8,12,16
5
Picture 3-6 definition of PIN Assignment
Notice:
①
Non-listed pin No. is empty pin.
During serial interface, baud rate and data structure can be set through
Setting Tool software. Default factory setting is 9600bps, 8bits data bit, no parity
and 1bit stop bit.
Summary of Contents for SP-RMD8
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