Emerson Rosemount 2410 Reference Manual page 40

Installation
March 2017
Typical characteristics for such a cable is:
Table 3-3. Typical characteristics of instrumentation cable
Parameter
Loop resistance
Inductance
Capacitance
Cross-sectional area
The Rosemount 2410 outputs 12.5 Vdc. Considering the minimum voltage supply of 9 V on the field
device terminals, a maximum voltage drop of 3.5 V on the Tankbus can be allowed. At a maximum
current consumption of 250 mA (12.5 Vdc) with all field devices located at the far end of the Tankbus, a
total "worst case" cable resistance of approximately 14 Ù (3.5 V/250 mA) is allowed. This corresponds to
a cable length of 333 m (1092 ft) in case typical cable characteristics are assumed as specified in
3-3 on page
However, normally the current consumption is less than 250 mA. A typical configuration would include a
tank supplied with a Rosemount 5900S Radar Level Gauge, a Rosemount 2230 Graphical Field Display, a
Rosemount 2240S Multi-input Temperature Transmitter, and a Rosemount 3051S Pressure Transmitter.
In this case the current consumption would be 128 mA allowing a cable length of 677 m (2221 ft)
between the Rosemount 2410 Tank Hub and the field devices on the tank. With fewer devices on the
Tankbus, an even longer cable would be allowed.
Table 3-4
tank for different cable cross-sectional areas. The table shows the maximum distance to a tank at a total
current consumption of 250 mA as well as for a typical installation as outlined above.
Table 3-4. Maximum distance from power source to field devices on the tank for different cable
Cross-sectional area
20 AWG (0.5 mm
18 AWG (0.75 mm
17 AWG (1.0 mm
16 AWG (1.5 mm
30
30.
shows the maximum distance between a Rosemount 2410 Tank Hub and the field devices on a
areas
Cable characteristics
Typical loop
resistance /km)
2
) 66
2
) 42
2
) 33
2
) 26
Value
42 /km
0.65 mH/km
115 nF/km
2
0.75 mm (18 AWG)
Maximum distance to tank (m/ft)
Maximum Current
consumption
(250 mA)
212 (695)
333 (1092)
424 (1391)
538 (1765)
Reference Manual
00809-0100-2410, Rev DA
Table
Typical installation
(128 mA)
414 (1358)
651 (2136)
829 (2720)
1052 (3451)
Installation