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Updated April 2, 2009
Note: The drawer sensor should switch pin 6 to pin 3 when the drawer is open.
EIA-232 connector pin assignments
SureMark printers contain a 9-pin D-shell connector port for EIA-232
communication. This port is on the interface card, accessible under the printer
without removing printer covers. The connector has the following pin functions:
See "Description of models" on page 4 for the cable part number.
EIA-232 parameters
Protocol
Baud rate
Start
Data
Parity None
Stop
Table 8. EIA-232 connector pin functions
Pin
Signal
1
Not Connected
2
Transmit
3
Receive
4
DTR (Not connected on 3-wire
cable)
5
Signal Ground
DTR/DSR mode or XON/XOFF mode. Dip switch selectable.
9600 or 19 200 kbps. Dip switch selectable.
1 bit
8 bits
1 bit
Table 9. 9-pin to 9-pin EIA-232 connector layout
System Description
Pin 2 - Rx (input)
Pin 3 - Tx (Output)
Pin 4 - DTR (Output)
Pin 5 - Gnd
Pin 6 - DSR (Input)
Pin 8 - CTS (Input)
Table 10. 25-pin to 25-pin EIA-232 connector layout
System Description
Pin 2 - Tx (Output)
Pin 3 - Rx (Input)
Pin 5 - CTS (Input)
Pin 6 - DSR (Input)
Pin 7 - Gnd
Pin 20 - DTR (Output)
Pin
Signal
6
DSR (Not connected on 3-wire
cable)
7
Not Connected
8
RTS
9
Not Connected
Printer Description
Pin 2- Tx (Output)
Pin 3 - Rx (Input)
Pin 4 - DTR (Input)
Pin 5 - Gnd
Pin 6 - DSR (Output)
Pin 8 - RTS (Output)
Printer Description
Pin 3 - Rx (Input)
Pin 2 - Tx (Output)
Pin 8 - RTS (Output)
Pin 6 - DSR (Output)
Pin 5 - Gnd
Pin 4 - DTR (Input)
Appendix C. Technical information
91
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