5 Electrical installation
WirelessHART Adapter SWA70
36
Hauser
5.3.3
Two-wire field device with power supplied by internal power
supply system
The following functions are possible with this connection version:
• Power supply to the field device
• Current measurement in the 4 to 20 mA range
• Digital HART communication if this is supported by the field device.
Connect the WirelessHART Adapter as illustrated below:
Fig. 5-11: WirelessHART Adapter with wide range power unit –
connection of a two-wire field device with power supplied by an internal power supply system
5.3.4
Four-wire field device
The following functions are possible with this connection version:
• Current measurement in the 4 to 20 mA range
• Digital HART communication if this is supported by the field device.
Connect the WirelessHART Adapter as illustrated below:
Fig. 5-12: WirelessHART Adapter with wide range power unit –
connection of a four-wire field device
1
WirelessHART Adapter terminals 1 to 6
2
Field device
1
WirelessHART Adapter terminals 1 to 6
2
Four-wire field device
1
2
3
4
5
6
+
+
–
–
24 V
1
2
24 –
230 V
1
2
3
4
5
6
24 V
+
–
+
–
1
2
24 –
230 V