Subject to alterations
Version 1.0
IPCOMM GmbH
- 6 -
IPC191X1 Manual
Walter-Bouhon-Straße 4
Copyright © IPCOMM GmbH, 2022
90427 Nuremberg
All rights reserved
Germany
2.5.3
8/16-Port RS-232 Serial Interface
8-port or 16-port serial interface cards can be installed in each IPC191X1. The following pin assignment
is realized with an 8-port DB9 male connector cable (see Figure 3).
SERIAL PORT
RS232 DTE
DB9 male connector
Pin
Direction
Description
1
INPUT
DCD
Data Carrier Detect
2
INPUT
RXD
Receive Data
3
OUTPUT
TXD
Transmit Data
4
OUTPUT
DTR
Data Terminal Ready
5
GND
Ground
6
INPUT
DSR
Data Set Ready
7
OUTPUT
RTS
Request To Send
8
INPUT
CTS
Clear To Send
9
Figure 5: pin assignment of DB9 serial interface
2.5.4
Protecting RS-232 Interfaces according to IEC 61850-3 / EN 61850
For the adequate protection against the impact of switching interferences (Burst) and surge voltage, we
recommend the use of our 4 kV isolated RS-232 isolator. The used RS-232 transceivers have ESD
protection up to 15 kV. The isolator was tested according to EMC guidelines, climatic and mechanical
requirements in compliance with the standard IEC 61850-3.
