Fieldbus Devices - ABB FV4000 Operating Instruction

Models designed for hazardous areas with American approval
Models
VT43 / ST43 / VR43 / SR43

11.1.2 Fieldbus devices

Models: VT4A, VR4A, ST4A, SR4A
The hazardous area design of the device is based on the PTB's FISCO model (FISCO =
fieldbus intrinsically safe concept).
Proof of intrinsic safety for interconnection with other intrinsically safe equipment is not required
under the boundary conditions specified.
• All nodes must have FISCO approval, e.g., from the PTB, TÜV, BVS, KEMA.
• The maximum cable length in a segment is restricted to 1,000 m for EEx ia and 1,900 m for
EX ib.
• The bus cable (type A) has to exhibit the following values: R' = 15 Ω/km,
L' = 0.4 ... 1 mH/km, C' = 80 ... 200 nF/km
• The following applies for every field device (U
• All nodes act as passive current sinks.
• No power is fed in when a bus node is sending.
There is only one active device per segment (supply unit / segment coupler).
Designation: II 2G EEx ia IIC T4
D184B097U02
Approvals
• Explosion-proof
XP/Class I/Div 1/BCD/T4 Ta = 70 °C Type 4X
• Dust-ignition-proof
DIP/Class II,III/Div 1/EFG/T4 Ta = 70 °C Type 4X
DIP/Class II,III /Div 2 /EFG /T4 Ta=70°C Type 4X
• Intrinsic safety
IS/Class I, II,III/Div 1 ABCDEFG/T4 Ta = 70 °C Entity Type
4X
• Non-incendive
NI/Class I/Div 2/ABCD/T4 Ta = 70 °C Type 4X
, I , P
l l
FV4000 / FS4000
Ex relevant specifications
): U ≤ U , I ≤ I , P ≤ P
i 0 l 0 l 0 i
97