Fieldgate FXA520
4 Hardware Installation
Hauser
23
4.2.3 HART point-to-point
Depending upon device and power supply there are three possibilities for connection:
• For loop-powered devices and power supply with communication resistor, see Fig. 4-6
• For loop-powered devices and power supply without communication resistor, see Fig. 4-7
• For 4-wire HART devices, see Fig. 4.8)
Fig. 4-6: Wiring for loop-powered HART devices, communication resistor in power supply
Fig. 4-7: Wiring for loop-powered HART devices, communication resistor in Fieldgate
7
11
8
12
9
13
+
+
–
–
- Prosonic M
- Micropilot M
- Levelflex M
…
Fieldgate
FXA 520
CH2
270
/0.55W
:
PSU
CH1
#
e.g.
CH = Channel
current output:
passive
PSU = Power supply unit
with communication
resistor
7
11
8
12
9
13
+
+
–
–
- Prosonic M
- Micropilot M
- Levelflex M
…
Fieldgate
FXA 520
CH2
270
/0.55W
:
PSU
CH1
#
PSU =
CH = Channel
e.g.
current output:
passive
Power supply unit
without communication
resistor
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