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F-2600 & F-2700 Vortex Flow Meter Manual 02/15 - 0808-7 / 19204 Page 71

SECTION 4.0: SERIAL COMMUNICATIONS

4.1 HART COMMUNICATIONS

The HART Communications Protocol (Highway Addressable Remote Transducer Protocol) is a

bidirectional digital serial communications protocol. The HART signal is based on the Bell 202

standard and is superimposed on 4-20 mA Output 1. Peer-to-peer (analog / digital) and multi-drop

(digital only) modes are supported.

4.1.1 WIRING

The diagrams below detail the proper connections required for HART communications:

Loop Powered Meter Wiring

LOOP

POWER

+ -

FREQ

OUT

PULSE

OUT

-- + +

OPTIONAL

BACKLIGHT

POWER

+ -

R load,

250 ohm

minimum

Power

Supply

Remote Connection

for Communicator

Current

Meter

Field Connection

for Communicator

Vortex Meter

Figure 50. Loop Powered Meter Wiring (HART)

WARNING

Place controls in manual mode when making conguration changes to the vortex meter.

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Onicon F-2600 Manuale Utente Pagina 71