Cable Selection For The Tankbus - Emerson Rosemount 2410 Reference Manual

Reference Manual
00809-0100-2410, Rev DA
3.4.5

Cable selection for the Tankbus

Use shielded twisted pair wiring for the Rosemount 2410 Series in order to comply with FISCO
requirements and EMC regulations. The preferred cable is referred to as type "A" fieldbus cable. The
cables must be suitable for the supply voltage and approved for use in hazardous areas, where
applicable. In the U.S. explosion-proof conduits may be used in the vicinity of the vessel.
We recommend cable size 1.0 mm
range 0.5 to 1.5 mm
The FISCO F
following parameters:
Table 3-1. FISCO cable parameters
Parameter
Loop resistance
Loop inductance
Capacitance
Maximum length of each spur
Maximum length of each trunk
1.
2.
3.
1, See IEC 61158-2 and IEC/TS 60079-27:2002.
Installation
2
or 20 to 16 AWG can be used.
™ fieldbus specification requires that cables for the Tankbus comply with the
OUNDATION
(1)
(2)
For further information see requirements of the IEC 61158-2 standard, and safety requirements in IEC/TS
60079-27:2002.
A spur is an unterminated part of the network.
A trunk is the longest cable path between two devices on the fieldbus network, and is the part of the network which
has terminations at both ends. In the Rosemount Tank Gauging system, a trunk is typically located between the
Rosemount 2410 Tank Hub and a splitter or the last device in a daisy-chain configuration.
2
or 18 AWG in order to facilitate wiring. However, cables within the
Value
15 to 150 /km
0.4 to 1 mH/km
45 to 200 nF/km
cable 60 m in apparatus class IIC and IIB
1000 m in apparatus class IIC and 1900 m in
(3)
cable
apparatus class IIB
Installation
March 2017
(1)
27