Chapter 2) 7SR23 DAD Settings, Configuration & Instruments Guide
©2013 Siemens Protection Devices Limited
Chapter 2 Page 14 of 18
2.1.4
Optional rear RS485 + IRIG-B connection (COM3)
COMMS MODULE
IRIG-B
COM3
GND
TERM
B
A
Laptop computer
RS232 straight
through cable
USB or 9 pin male
D connector
RS485 Screened
twisted pair
7SR
Figure 2-4
Additional (Optional) rear RS485 + IRIG-B connection to a PC
2.1.5
Optional rear RS232 + IRIG-B connection (COM3)
Figure 2-5
Additional (Optional) rear RS232 + IRIG-B connection to a PC
Pin
Relay Function
1
Not
Connected
2
Receive Data (RXD)
3
Transmit Data (TXD)
4
Outut 5 V 50mA
5
Signal Ground (GND)
6
Input 5 V 50mA
7
Linked to 8 (volts free)
8
Linked to 7 (volts free)
9
Output 5V 50mA
Summary of Contents for 7SR23 DAD
Page 1: ...Answers for energy 7SR23 DAD High Impedance Protection Relay Reyrolle Protection Devices ...
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Page 4: ...7SR23 DAD Contents 2013 Siemens Protection Devices Limited ...
Page 60: ...Chapter 3 7SR23 DAD Performance Specification 2013 Siemens Protection Devices Limited ...
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