Table A-5: Allowed Cabling Distances for Different System Configurations
Cable
diameter
Loop
resistance
Maximum cabling distance from power source to all devices
on the tank
With maximum
power usage of
250 mA
Distance in m (ft)
With typical power
usage of 128 mA
for 5900S, 2240S,
2230, 3051S
Distance in m (ft)
With typical power
usage of 178 mA for
5900S 2-in-1, 2240S,
2230, 3051S
Distance in m (ft)
20 AWG (0.5
mm²)
66 Ω/km 212 (695) 414 (1358) 298 (978)
18 AWG (0.75
mm²)
42 Ω/km 333 (1092) 651 (2136) 468 (1535)
17 AWG (1.0
mm²)
33 Ω/km 424 (1391) 829 (2720) 596 (1955)
16 AWG (1.5
mm²)
26 Ω/km 538 (1765) 1000 (3281) 756 (2480)
The typical cabling distance from the tank hub toward the control room is up to 4 km (2.5
miles) depending on which protocol is used.
A.3.4
Power and relay cabling
0.5-2.5 mm² (AWG 22-14), twisted shielded pairs
A.3.5
Maximum Tankbus cable lengths
Depends on the cable. For details, see the Rosemount Tank Gauging System Data Sheet.
A.3.6
Built-in Tankbus terminator
The Rosemount 2410 Tank Hub has a built-in tank bus terminator, which can be
disconnected if required.
Specifications and reference data Reference Manual
December 2019 00809-0100-2410
126 Reference Manual
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