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
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