Elster EK280, Руководство по применению, Страница: 70 / 163

EK280 Application Manual 68
7.2
EM260 to serial interface
7.2.1
EM260 connection
To connect an Elster modem EM260 to the EK280, the terminal interface of the EM260 is connected in
accordance with the following illustration to the termination interface of the EK280. The latter needs to be
parameterized for RS232 operation. This is done by loading the application-specific parameter file (analog
modem, Ethernet). The name of the parameter file to be used is given further down in the appropriate section.
For the connection of the EM260 to EK280, an 8 core cable needs to be used; this is included with the EM260
as supplied. The required cable length needs to be indicated when the EM260 is ordered (2m, 5 m or bespoke
length).
The individual cores must be taken to the inside of the EK280 through one of the metal unions; the housing of
the EK280 needs to be opened up for this purpose.
Attention! Danger!
Ensure the mains voltage is disconnected before opening the EM260 housing, ensure it is not
turned back on and verify that there is no voltage.
The cable screen must be expertly connected to the EK280 bulkhead fitting so as to prevent electromagnetic
interference.
Use of the interface terminations of the EK280 and the EM260):
EM260
EK280
230V AC
230V
PE
+9V
GND
TxD
RXD
DTR DCD
RxD TxD
DCD DTR
Ri RI
GND GND
Uext+
Telephone
connection
a
Uext-
B
a2
b2