Instruction Manual ScrubberGuard
Electrical installation
42
14830E/2
5.5.5
Overview of HART
Information on commissioning the field bus interfaces can be found in the Reference
Handbook.
Figure15: Overview of the HART module
Field bus interface (connection
PCB) for HART. Serves as interface
to HART.
HART terminals
5.5.6
Connecting to HART
The terminals of the HART module are configured as follows:
Terminals
HART
Functional description
1
mA+ In
Must be connected with terminal 19 (mA 1+)
on the AQ2Basi PCB.
2
mA- In
Must be connected with terminal 18 (mA 1-)
on the AQ2Basi PCB.
3
Shield
Cable shielding.
4
mA+ Out
Current output 1 (+) with HART.
5
mA- Out
Current output 1 (-) with HART.
The loop resistance on current output 1 can be between 230 and 500 Ohm for HART com-
munication.