IM-P736-02 EMM Issue 3
42
VLM30 In-Line Vortex Flowmeter
1 Control cabinet
2 Power supply
3 Power supply for the remote
transmitter
4 Load resistance
5 External pressure transmitter
6 VLM30S connection with
output option H1
7 VLM30E connection with
output option H5
Fig. 26 Connection of transmitters with HART communication (example)
A remote pressure transmitter with HART communication can be connected through the current output/
HART output (4 to 20 mA). Here, the remote transmitter must be operated in HART Burst mode, with the ‘P6
– HART Burst Mode’ ordering option. The VLM30 supports HART communication up to the HART7 protocol.
Note: The VLM30 cannot communicate with a control system or configuration tool via HART while the
pressure transmitter is communicating in BURST mode, because the BURST signal has priority over cyclical
HART communication.
3.18.7 HART
®
communication with remote transmitter
1 2 3
4
6
5
1 2 3
4
7
5
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