N-Tron 102PC-SE user manual Serial Interface, Serial Cable, RS-232

SERIAL INTERFACE

The 102PC-SE provides an EIA-232 interface accessed via a 9 pin male connector (labeled ‘COM’ on the u nit). This is used to access the Command Line Interpreter (CLI), and to attach serial devices to the network over Ethernet. The pin-outs are shown below:

PIN

1

2

3

4

5

6

7

8

RS-232

DTR

TXD

RXD

DSR & DCD

GND

DTR

CTS

RTS

Default Port Settings:
Baud-Rate:	115200
Data Bits:	8
Parity:	None
Stop Bits:	1
Flow Control:	Hardware
	RTS-CTS

Serial Cable

Connect the serial COM port of your PC and the 102PC-SE Protocol Converter using a standard straight through cable. You will need a cable with a 9-pin or 25-pin sub-D female connector for the PC end (DTE device), and a 9-pin female sub-D connector for the 102PC-SE end (DCE device).

The following table shows the pin-out and the connections for a straight through cable:

PC/DTE Device Cable End

DTE Device	25-Pin	9-Pin
Port	Female	Female
Signal Name	Pin #	Pin #
DCD	8	1
RXD	3	2
TXD	2	3
DTR	20	4
GND	7	5
DSR	6	6
RTS	4	7
CTS	5	8

102 PC-SE Cable End

9-Pin Female

Pin # Signal Name

1DTR

2TXD

3RXD

4DSR & DCD

5GND

6DTR

7CTS

8RTS

Connect the serial COM port of your DCE device and the 102PC-SE Protocol Converter using a null modem cable. You will require a cable with a 9-pin or 25-pin sub-D connector for your DCE device end, and a 9-pin female sub-D connector for the 102PC-SE end.

The following table shows the pin-out and the connections for a null modem cable:

DCE Device Cable End

DCE Device	25-Pin	9-Pin
Port	Female	Female
Signal Name	Pin #	Pin #
DTR	8	6+1
TXD	3	2
RXD	2	3
DSR & DCD	20	4
GND	7	5
CTS	4	7
RTS	5	8

102 PC-SE Cable End

9-Pin Female

Pin #	Signal Name
4	DSR & DCD
3	RXD
2	TXD
6+1	DTR
5	GND

8RTS

7CTS

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