Star TSP650 SERIES - RS-232 C Connector

– 39 –
13-2. RS-232C Connector
Pin No. Signal name Direction Function
1 F-GND — Frame ground
2 TXD OUT Transmission data
3 RXD IN Receive data
4 RTS OUT Always SPACE
5 N/C Not used.
6 DSR IN 1) STAR Mode
Not used.
2) ESC/POS Mode
When DIP Switch 3-7 = OFF;
A) DTR/DSR communication mode
Indicates whether data receive from host is enabled or
disabled.
Space: Receive enabled
Mark: Receive disabled
(except when transmitting data by DLE EOT, and GS a)
B) X-ON/X-OFF communication mode
Status of this signal is not checked.
When DIP Switch 3-7 = ON;
This is an externally reset signal.
A space above 1 ms pulse width engages reset.
7 S-GND — Signal ground
8~19 N/C Not used.
20 DTR OUT 1) STAR Mode
A) DTR/DSR communication mode
Indicates whether data receive from host is enabled or
disabled.
Space: Receive enabled
Mark: Receive disabled
B) X-ON/X-OFF communication mode
Always space, except during following condi
-
tions:
• Period between reset and communication ena
-
bled
• During self printing