AMT Datasouth Fastmark 4600 PLUS Series User’s guide User Manual page 69

Serial Interface
The RS-232 connector on the printer side is a female, DB-9.
Pin Direction
1 In
2 In
3 Out
5 -
6 Out
7 Out
8 In
9 Out
Note: Pin 9 is reserved for a KDU (keyboard device unit). Do not connect this pin
if you use a general host such as a PC
.
Definition
DSR
RxData
TxData
Ground
DTR
RTS
CTS
+5V
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