4 Hardware Installation
Fieldgate FXA520
24
Hauser
Fig. 4-8: Wiring of 4-wire HART devices
4.2.4 HART multidrop with FXN520
Up to eight HART devices per channel can be connected to the Fieldgate when it is used in
conjunction with a FXN520 multidrop connector. The actual number depends upon the power
consumption of each device and can be calculated by the FieldNetCalc tool.
The power supply must be chosen such that the input voltage at the terminals L+, L– does not
exceed the maximum permissible supply voltage of the connected devices.
HART multidrop requires that each device on the bus has a unique address. Instructions on how to
set the addresses of HART devices are to be found in the individual device manuals.
Fig. 4-9: Wiring for HART multidrop with FXN520
7
11
8
12
9
13
+
–
- Promass
- Prosonic
…
Fieldgate
FXA 520
CH2
CH1
CH = Channel
e.g.
current output:
active
270 /0.55 W
Ω
7
8
9
10
11 12 13 14
1
2
t
250
Ohm
FXN520
Multidrop connector
Channel 1
250
Ohm
L+ L-
L+ L-
Power
supply
L1 N
7 8 11 12
Fieldgate
FXA520
External
power
Channel 2
Up to 8 devices per channel
(Calculation with FieldNetCalc)
U= 20...45 VDC
Summary of Contents for Fieldgate FXA520
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