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Rev. 041008
13
SERIAL INTERFACE
The 102PC-SE provides an EIA-232 interface accessed via a 9 pin male connector (labeled ‘COM’ on the
unit). 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:
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 102 PC-SE Cable End
DTE Device 25-Pin 9-Pin
Port Female Female 9-Pin Female
Signal Name Pin # Pin # Pin # Signal Name
DCD 8 1 1 DTR
RXD 3 2 2 TXD
TXD 2 3 3 RXD
DTR 20 4 4 DSR & DCD
GND 7 5 5 GND
DSR 6 6 6 DTR
RTS 4 7 7 CTS
CTS 5 8 8 RTS
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 102 PC-SE Cable End
DCE Device 25-Pin 9-Pin
Port Female Female 9-Pin Female
Signal Name Pin # Pin # Pin # Signal Name
DTR 8 6+1 4 DSR & DCD
TXD 3 2 3 RXD
RXD 2 3 2 TXD
DSR & DCD 20 4 6+1 DTR
GND 7 5 5 GND
CTS 4 7 8 RTS
RTS 5 8 7 CTS
PIN RS-232
1
DTR
2
TXD
3
RXD
4
DSR & DCD
5
GND
6
DTR
7
CTS
8
RTS