6.1.3
Connection values at the terminals
Input and output terminal values
Keep to the following input and output values at the terminals as shown in the wiring diagrams
in the section "Wiring diagrams" (Page 33).
Note
Due to the internal communications resistor, the supply voltage of the field device varies
depending on the set current and no-load voltage.
● Power supply for field devices (terminal 1):
– No-load voltage can be set between 8 V and 23 V in steps less than 0.1 V
– Electric current: 4 mA DC ≤ I
out
≤ 20 mA DC (according to NAMUR recommendation
NE 43)
● 4 bis 20 mA/HART input (terminal 2):
– Electric current: 4 mA DC ≤ I
in
≤ 20 mA DC (according to NAMUR recommendation
NE 43)
● High-resistance HART input/output connectors (terminals 4, 5, 6):
– Input impedance 3.7 kΩ for HART communication
– Input impedance DC = ∞
Checking the terminal connections
After wiring up the WirelessHART adapter, make the following checks:
● Are the terminals wired up correctly?
● Is the cable gland tight?
6.2
Wiring diagrams
6.2.1
Overview
Options for connecting the WirelessHART adapter to a field device
There are various options for connecting the WirelessHART adapter to a field device
electrically:
● Connection of a two-wire field device and supplying the device with power
● Connection of a four-wire field device
Connecting
6.2 Wiring diagrams
WirelessHART Adapter SITRANS AW200
Operating Instructions, 02/2020, A5E02777161-AA
33
