DESCRIPTION
15
2.8.4.
Connection of the optional connector PORT1
Panel socket RJ45.
2.8.4.1.
Expansion port RS232
(RS232 – DCE – Data Communication Equipment)
Pin
No.
Signal
name
Description
Data flow
direction
1
RTS
Request To Send
Input
2
CTS
Clear To Send
Output
3
DTR
Data Terminal Ready
Input
4
DSR
Data Set Ready – connected to +3,3 V over 330 Ohm
resistor
Output
5
GND
GROUND – signal ground
6
RXD
Receive Data
Output
7
CD
Carrier Detect
Output
8
TXD
Transmit Data
Input
Circuit example:
The router connection to the PC:
•
cable KD2 is connected to serial port PC (example COM1)
Router
ETH
PORT1
PWR
Cable KD-2
Pin 1 – RTS
Pin 2 – CTS
Pin 3 – DTR
Pin 4 – DSR
Pin 5 – GND
Pin 6 – RXD
Pin 7 – CD
Pin 8 – TXD
Router
Meter
GND
RXD
TXD
LUCOM GmbH * Ansbacher Str. 2a * 90513 Zirndorf * Tel. 09127/59 460-10 * Fax. 09127/59 460-20 * www.lucom.de