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4.3.1
BUS
(
HART
®
)
COMMUNICATION
VF04 has two output options:
Current output and HART® - Passive, HART® protocol
’Ex ia’ current output and HART® - Intrinsically safe passive, HART® protocol
In accordance with the Rosemount Standard, HART® communication can be used with a VF04 2-wire.
It is used as a point-to-point connection between the VF04 2-wire as slave and the HART® master.
N x 4 mA + HART
HART
HHC
-
HART-Master
4.4
P
OWER
-
ON AND START
-
UP
The VF04 2-wire is pre-configured in accordance to customer order specifications and measurements can be made immediately.
A start-up time of approximately 60 seconds should be allowed once the unit is connected and the power is switched on.
If the probe length has been shortened since delivery, please refer to section 5.1.2: Summary of Parameter Functions, user function 1.1.6: Probe length to modify
configured probe length.
4.5
A
VAILABLE USER INTERFACES
Programming of VF04 can be done using the following instruments / accessories:
HyView software
Accessory shipped with the instrument.
See chapter “5.1 Programming with HyView software”. (PC needed.)
VGF-DISPLAY display unit
Can be ordered.
See chapter “5.2. Programming with VGF-DISPLAY display unit”.
HART® (HHC) Handheld Communicator
Sold separately. Automatic device detection on powering.
See chapter “5.3 Programming with HART® (HHC) Communicator”.
4…20 mA + HART
Modem
HART
HHC
-
HYVIEW
or HART specific
software and
operating devices
H
AR
T
M
O
D
EM