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Device description
The device shall be powered off while accessing any of the power or alarm relay connectors.
Any other connectors (e.g. RS-232 or 4-wire/2-wire communication port/X3) are hot-pluggable
while the device is operating.
No plug shall be freely accessible in normal operation due to safety reasons.
Due to the internal overvoltage protection, interrupt any connection to ground of the device for
the time of the measurement before you carry out isolation measurements. This includes the
earthing of the hat rail as well as all shields of all transmission lines and supply feedings. RJ-12
plugs or RJ-45 plugs can also establish earthing via the shield.
4.5.2
Serial interface to DTE
The RJ-45 connector marked with "DTE" forms an RS-232-D interface. If the modem is connected
to an RTU, an adapter cable has to be used which connects the pin pairs.
Serial interface to DTE
Electrical specification
Plug type
Cable
Adapter cable
Galvanic isolation
Overvoltage protection
Pin allocation serial interface DTE (RJ-45)
8
4.5.3
Interface to transmission line
In two-wire mode X3-1 and X3-2 form terminal NF1 which is used for transmission and reception.
In four-wire mode X3-1 and X3-2 form the transmitter terminal NF1 and X3-3 and X3-4 form the
receiver pair NF2.
1KGT151042 V001 1
RS-232-D
Pin
1
2
3
4
5
1
6
7
8
WARNING
WARNING
A D V I C E
ITU-T V.24, EIA RS-232, EIA/TIA-561
RJ-45 (8P8C)
shielded RS-232 cable, up to 3 m
500CAB08 1KGT038915R0001: RJ45 to
SubD9F (SWT-RS232), shielded
no
shield to earth 4 kV
Signal V.24
Signal V.28
DSR M1
107
DCD M5
109
DTR S1
108.2
GND
GND
RxD C2
104
TxD D1
103
CTS M2
106
RTS S2
105
Connections
Direction
output
output
input
-
output
input
output
input
23
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