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Fieldgate FXA520
3 Function and System Design
Hauser
17
3.5.3 HART Multiplexer
The RS-485 interface of Fieldgate FXA520 can be used to connect up to two HART multiplexers,
e.g. the KFD2-HMM-16 from Fuchs. This allows up to 30 HART devices to be connected.
The HART devices can be parametrized locally with FieldCare or a service tool.
When the devices are operating in a safe area, the RNS221 transmitter power supply can be used
to power two devices.
Ex-devices can also be located in a hazardous area. In this case the signal must be connected to the
safe side of a RN221N-B transmitter power supply.
Fig. 3-9: System architecture for HART multiplexer connection
RS-485
Master
Master
e.g.
RNS221
RS-485
Fieldgate
FXA520
.
maximum 15 devices
Web browser
HTTP script
FieldCare
Service tool
…
Analog
Ethernet
GSM
HART-Multiplexer
e.g. P Fuchs
KFD2-HMM-16
HART-Multiplexer
e.g. P Fuchs
KFD2-HMM-16
WWW
maximum 15 devices
e.g.
RN221N-B
-
Содержание Fieldgate FXA520
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