Optional Rear Rs232 Connection; Configuring Relay Data Communication - Siemens 7SR224 Technical Manual

2.1.4

Optional Rear RS232 connection

The optional RS232 port is a 9 pin male D connector with the following pin out.
Pin
1
2
3
4
5
6
7
8
2.1.5

Configuring Relay Data Communication

Using the keys on the relay fascia scroll down the settings menu's into the 'communications' menu and change
the settings for the communication port used on the relay. All of the below settings may not be available in all
relay types. Reydisp software uses IEC60870-5-103 protocol to communicate.
COM1-RS485 Port
COM2-USB Port
COM3 – Optional Fibre Optic, RS485 or RS232
COM4 – Optional Fibre Optic
©2010 Siemens Protection Devices Limited
Figure 2.1.4-1 Direct RS232 Connection to PC
Received Line Signal Detector
7SR224 Argus Settings, Configuration & Instruments
9 pin Female D
Connector
Function
Received Data
Transmit Data
Data Terminal Ready
Signal Ground
Data set ready
Request to Send
Clear to Send
Chapter 2 Page 11 of 13