Device Cable requirements
977 Tank Side Indicator : Twisted pair and shielded; R
max
= 5 Ω / line, maximum cable length
50 m (160 ft).
GFC (Foundation™ Fieldbus) : Requires external supply 9 – 24 Vdc
Nominal current 11 mA
Maximum current (startup) 16.70 mA
Water bottom probe : Twisted pair and shielded; R
max
= 25 Ω / line.
(no VITO water sensor) (only with HART
7
protocol).
Note:
If also pressure transmitters are connected, use a junction box for parallel connection of the
pressure transmitters and water bottom probe.
Figure 11 Intrinsically safe option connections
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