12-3
12.3 Serial RS-232C Interface (D-SUB25 Pin/D-SUB 9 Pin)
12.3.1 Specifications
Standard: RS-232C
Transmission method: Start-Stop synchronization method
Baud Rate: 4800, 9600, 19200 bps
(Set by DIP switches)
Data Length: 7 or 8 bits DIP Switch Settings
Parity: Parity or not (Set by DIP switches)
Parity Bit: Odd or even (Set by DIP switches)
Stop Bit: 1 Bit (Fixed)
Signal polarity: Mark Logic 1 (-3 to -15 V)
Space = logic 0 (+3 V to +15 V)
12.3.2 Connectors
Pin
No.
25
Pins
Pin
No.
9 Pins
Signal
Name
Direct
ion
Function
1 - FG - Frame Ground
2 3 TXD OUT Transmission Data
3 2 RXD IN Reception Data
4 7 RTS OUT Always SPACE (Ready to Receive)
5 - N.C - Not Used
6 6 DSR IN 1) DIP Switch 1-7 (on I/F Card) = OFF
A. ESC/POS Mode
Indicates whether the host can receive data.
SPACE: Host is ready to receive data
MARK: Host is not ready to receive data
a) DTR/DSR Communications Mode
Checks that status of this signal and sends data.
(However, this excludes data transmission using <DEL><EOT>,
<GS>a)
b) XON/XOFF Communications Mode
Does not check the status of this signal.
B STAR Mode
Not Used
2) DIP Switch 1-7 (on I/F Card) = ON
Becomes an external reset signal.
Reset is applied when there is a mark status with over 1 ms pulse
width.
- 8 CTS IN Same as DSR
7 5 SG - Signal ground
8-19 1 N.C - Not Used
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