
Installation
2
0
1
7
-0
5
25
Figure 3.14
Connection of loop-powered device to
active adapter
Four-wire device
In this configuration, the field device is operating independently and is powered by an external
power source. The adapter provides the following functions:
■
Current measurement via 4 ... 20 mA interface,
■
HART digital communication, if supported by the connected device.
Figure 3.15
Connection of active four-wire device to
passive adapter
3.3.2
Connecting Cables
Required tools:
■
Phillips screwdrive PZ1 to open the adapter cover,
■
Screwdriver with 2.5 mm blade to make the connections.
Note!
For HART devices, we recommend that the device is operated in multidrop mode to prolong
battery life. In this case, a polling address between 1 and 14 is set and the device outputs a
constant current of 4 mA.
1
Field device (passive)
1
Four-wire field device (active)
2
External Power Source