
Installation
2
0
1
7
-0
5
21
4. Thread the cable entry through the hole in the mounting bracket such that the antenna is is
on the side farthest away from the wall.
5. Remount the counternut and screw until the adapter is loosely held.
6. Align the adapter so that the antenna is vertical.
7. With the cable entry nut held with a spanner, tighten the counternut (torque 7 Nm).
3.3
Electrical Connection to other Devices
The
Wireless
HART adapter can be connected to the following device types/configurations.
■
Field device operating in a control loop without communication resistor
■
Field device operating in a control loop with communication resistor
This configuration is used for HART multidrop with 2, 3, or 4 devices
■
Two-wire field device operating independently with power supplied by the adapter
■
Four-wire field device operating independently with power supplied by an external source
The devices are connected to the terminal block located inside the adapter housing.
Figure 3.9
Terminal block (1 ... 6) and terminals for Ex ia certified HART modem (7 + 8)
Caution!
Loss of intrinsic safety
If Ex i protected circuits have been operated with non-intrinsically safe circuits, they must no
longer be used as Ex i protected circuits.
To maintain the Ex i rating of the
Wireless
HART adapter, use an Ex i rated HART modem to
communicate with the
Wireless
HART adapter.
Terminal
Function
1
Device supply
2
HART / 4 ... 20 mA
3
External Supply / GND
4, 5, 7
HART high impedance
6, 8
High impedance GND