ONICON F-2600 - Manual (Page 71)

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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
+
_
DC
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 configuration changes to the vortex meter.