AMT Datasouth 4000 manual Connection with host

Connection with host:

Host 25S		Printer 9P	Host 9S		Printer 9P
(PC or compatible)			(PC or compatible)
DTR 20	………..	1 DSR	DTR 4	………..	1 DSR
DSR 6	………..	6 DTR	DSR 6	………..	6 DTR
TX 2	………..	2 RX	TX 3	………..	2 RX
RX 3	………..	3 TX	RX 2	………..	3 TX
CTS 5	………..	7 RTS	CTS 8	………..	7 RTS
RTS 4	………..	8 CTR	RTS 7	………..	8 CTS
GND 7	………..	5 GND	GND 5	………..	5 GND

Alternatively you can just connect the 3 wires in the following way.

Host 25S		Printer 9P	Host 9S		Printer 9P
(PC or compatible)			(PC or compatible)
TX 2	………..	2 RX	TX 3	………..	2 RX
RX 3	………..	3 TX	RX 2	………..	3 TX
GND 7	………..	5 GND	GND 5 ………..		5 GND
pin 4			pin 4
pin 5			pin 6
pin 6			pin 7
pin 20			pin 8

The simplest way to connect to other hosts (not PC compatible) or terminals is:

Printer

Pin 2- RxData

Pin 3- TxData

Pin 5- Ground

Terminal/Host

…………TxData

…………RxData

…………Ground

In general as long as the data quantity is not too large or you use Xon/Xoff as flow control, there will be no flow control issues.

80 User's Guide