AMT Datasouth 4600 - Manual (Page 61)

58
Serial Interface
The RS-232 connector on the printer side is a female, DB-9.
Pin Direction Definition
1 In DSR
2 In RxData
3 Out TxData
5 - Ground
6 Out DTR
7 Out RTS
8 In CTS
9 Out +5V
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
.