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GENERAL SPECIFICATIONS
5-2. Connector Signal and Functional Descriptions (SPC-8K, IS-8H192)
Pin No.
Signal name
1
GND
2
TXD
3
RXD
4
RTS
5
CTS
6
NC
7
GND
8~10
NC
11
RCH
12~19
NC
20
DTR
21~25
NC
5-3. DIP Switch Settings (SPC-8K, IS-8H192)
Direction
—
OUT
IN
OUT
—
—
OUT
OUT
Switch
1
8 data bits
2
No parity
3
Handshaking protocols – see table below
4
5
Odd parity
6
7
Data transfer rate – see table below
8
All switches are set to ON before the printer leaves the factory.
Protocol
DTR mode
X
/X
mode
ON
OFF
ETX/ACK mode
Baud rate
Switch 6
150
300
600
1200
2400
4800
9600
19200
Printer chassis ground.
This pin carries data from the printer.
This pin carries data to the printer.
Always space.
This signal is space when the computer is ready to send data.
The printer does not check this pin.
Unused.
Signal ground.
Unused.
The printer sets this signal to space when it is ready to receive data.
This line carries the same signal as pin 20.
Unused.
The printer sets this signal to space when it is ready to receive data.
Unused.
ON
7 data bits
Parity checked
Even parity
Switch 3
ON
ON
OFF
Switch 7
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
ON
OFF
ON
OFF
ON
ON
ON
ON
– 12 –
Function
OFF
Switch 4
ON
OFF
ON
Switch 8
OFF
ON
OFF
ON
OFF
ON
OFF
ON
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