
2
0
1
7
-0
5
24
Installation
Figure 3.12
Connection of adapter to a control loop with communication resistor
New installations
: For new installations, we recommend that the adapter is wired as shown in
the following figure.
Figure 3.13
Alternative method of connection of adapter to a control loop with communication
resistor
Two-wire device powered by adapter
In this configuration, the field device is operating independently and is powered by the adapter.
The adapter provides the following functions:
■
Current measurement via 4 ... 20 mA interface,
■
HART digital communication, if supported by the connected device.
1
PLC, Remote I/O, DC power supply with communication resistor
2
Field device
1
PLC, Remote I/O, DC power supply with communication resistor
2
Field device