CD7220/CD3220 CUSTOMER DISPLAY
9
(c) RS232C to PC/HOST connector: D-sub 25 pin female pin assignment
Pin No.
Signal
Direction
Function description
1
FG
Frame ground
2
TXD
From printer to PC/Host
Printer status data
3
RXD
Input
Receive data
4
RTS
Output
Display/printer ready signal
5
CTS
From PC/HOST to printer Host
Ready signal
6
DSR
From PC/HOST to printer
Host ready signal
7
GND
Signal ground
16
V+
Input
If using power built-in
20
DTR
Output
Display/printer ready signal
Table 4-1
(d) RS232C to printer connector: D-sub 9 pin male pin assignment
Pin No.
Signal
Input / Output direction
Function description
2
RXD
From printer to PC/Host
Printer status data
3
TXD
Output
Transmit data
4
DTR
From PC/HOST to printer
Host ready signal
5
GND
Signal ground
6
DSR
Input
Printer ready signal
7
RTS
From PC/HOST to printer
Host ready signal
8
CTS
Input
Printer ready signal
Table 4-2
