EZ-Tear 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
51R pull up to 5V
Input
Aux Power (low
current)
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/
Fault
7 PRT_RS232_CTS
(host RTS)
Input Output
Handshake
8 PRT_RS232_RTS
(host CTS)
Output Input
Handshake
9
n/a
100k pull up to 5V
Input
None
Shell
Frame Ground
Frame Ground
Frame Ground
Shield
Table 9: RS-232 Interface Pin-Out
102136
July, 2005
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