Hart  Communication - BD Sensors DPT 200 Betriebsanleitung


4. HART communication
An additional signal complying with the HART
logue output signal. Configuration of the device can be carried out with the aid of a
®
HART communication device. We would recommend our CIS 150 programming kit
(available as an accessory) for this purpose.
In order to ensure trouble-free operation, the following specifications should be taken into
account:
Maximum length of cable between measuring instrument and supply unit:
where L : maximum length of the cable in [m]
max
R : resistance of the cable together with
V
the load resistance in []
C : capacitance of the cable in [pF/m]
V
Resistance R:
where U: supply in [V
The resistance must be at least 250 .
®
]
DC
specification is superposed on the ana-
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