Function Expansion Unit FE260
Elster-Instromet GmbH
7
Telecommu-
nications
network
Modem
(optional)
Local
interface
(optional)
Pulse
outputs
(4 x)
Optical
Interface
RS232
Interface
Electrical
isolation
10...30 V DC
Voltage
monitor
Intrinsically
safe circuits
Pulse
ouputs
(4 x)
RS485
Interface
Power
good
signal
Power
supply
8,5 V
Fig. 2: Block diagram of FE260, "DC" version.
Two signalling lamps fitted to the cover indicate the following states:
•
“Power”:
The device is ready for operation.
•
“Online”:
Data transmission is running via the installed or connected modem. Data
is being transmitted between the connected volume corrector and the
readout station or control station over a telecommunications network.
At the start of a remote data transmission "Online" flashes with the ringing
tones which the modem receives.