
Installation
Electrical installation
Connection for an external modem
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28
EDSMF2181IB EN 3.0
5.2.6
Connection for an external modem
Assignment of the RS232 interface
View
Designation
Pin
V.24
RS232
Signal
Signal name
Direction
1
6
5
9
1
109
CF
DCD
Data Carrier Detector
Output
2
104
bb
RD
Data
Output
3
103
BA
TD
Transmitted Data
Input
4
108/2
CD
DTR
Data Terminal Ready
Input
5
102
from
SG
Signal Ground
−
6
107
cc
DSR
Data Set Ready
Output
7
105
CA
RTS
Request To Send
Input
8
106
CB
CTS
Clear To Send
Output
9
125
CE
−
Ring Indicator
Output