EZ-Load Thermal Printer
Owner’s Manual
Communication Cables Pin-Out
The tables below detail the connection pin-out for the RS-232 interface
(Female Receptacle DB-9).
Pin
Signal Name
Printer I/O
Host I/O
Printer
Function
1
n/a
always driven low
(high on RS232
side)
Input None
2 PRT_RS232_TXD
Output Input
Data
transmit
3 PRT_RS232_RXD
Input
Output Data
receive
4 n/a
No
connect Output
None
5
Signal Ground
Signal Ground
Signal Ground
Signal
Ground
6 RS232_DSR
Output
Input
Printer
Ready
(Connected to
PRT_RS232_
RTS Pin 8)
7 PRT_RS232_CTS
(host RTS)
Input Output
Handshake
8 PRT_RS232_RTS
(host CTS)
Output Input
Handshake
9
n/a
always driven high
(low on RS232
side)
Input None
Shell
Frame Ground
Frame Ground Frame
Ground Shield
Table 9: RS-232 Interface Pin-Out
101049
Sept. 21, 2005
13
