User's Manual

Fieldgate FXA320, FXA520
Endress + Hauser 9
HART - Multidrop configuration (FXA520 only)
• Only HART communication possible
• Up to 30 devices (2 x 15) can be connected
• When the maximum number of devices are connected, observe the following:
– Minimum operating voltage of the connected devices,
– Voltage drop at the communication resistor,
– HART conformity multi-drop of the connected devices,
– Current consumption of the connected devices
– Output characteristics of the power supply unit
– All connected devices must first be allocated their own HART polling address
• A HART communication resistor is already integrated into the device. When the internal communication
resistor is used, the permitted number of devices in multi-drop operation is reduced due to the limited
current-carrying capacity of the resistor.
L00-FXA520xx-14-00-06-en-003
All E+H measuring devices with the HART protocol can, therefore, be used to the full extent with
the Fieldgate
A current list of all E+H measuring devices that have the HART protocol can be found under:
• www.hartcomm.org: "HART Products/Product Catalogue/ ...".
All Endress+Hauser measuring devices with HART protocol can be connected to the Fieldgate.
Even 4...20 mA devices without HART protocol can be operated in conjunction with the Fieldgate, e.g. limit
switch (Liquiphant, ...). However, then only the measured value can be read. The remote maintenance
function is not given for 4...20 mA devices because the HART protocol is required for this function.
Multidrop
Connector
FXN520
Fieldgate
FXA520
supply
voltage
24 V
Web browser
ToF Tool - FieldTool Package
HTTP script
…
Analogue
Ethernet
GSM
up to 15 devicesup to 15 devices
device address: 15 … … 03 02 01
channel 1 channel 2