Point Of Sale Devices: scanners, printers, cash registers cables and connectors pinouts
Used on the DYMO/CoStar LabelWriter thermal printers that connect through RS-232.
LabelWriter Pin
Name
LabelWriter Pin
Number
Direction computer Pin
Number
computer Pin
Name
Description
CTS 1 --> 8 CTS Clear to send
TXD 2 <-- 3 TXD RS232 Transmit (to LabelWriter)
RXD 3 --> 2 RXD RS232 Receive (from LabelWriter)
GND 4 --- 5 GND Ground
RTS 5 <-- 7 RTS Request to send
DSR 6 --> 6 DSR Data set ready

This pinout comes from the cable that came with a CoStar LabelWriter XL Plus, tested with a multimeter. (It is likely that its the same one used for other LabelWriters made by CoStar and DYMO, but this is merely speculation.)

 

6 pin RJ12 (6P6C) male connector layout
6 pin RJ12 (6P6C) male connector
at the LabelWriter
9 pin D-SUB female connector layout
9 pin D-SUB female connector
at the computer
According to 3 reports in our database (3 positive and 0 negative) this pinout should be correct.

Is this pinout
CoStar/DYMO LabelWriter RS-232 Cable visual pinout:
CoStar/DYMO LabelWriter RS-232 Cable diagram
click to enlarge
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