KROHNE H250 M40 FOUNDATION FIELDBUS - Manual (Page 10)

3
ELECTRICAL CONNECTIONS
10
H250 M40
www.krohne.com 02/2014 - 4001208201 - AD H250 M40 FF R02 en
3.6 Topology of FF networks
An example of mixed topology of FF networks is shown in the following example.
Connection is best made via short branch cables and T connectors. This connection type makes it
possible to connect and disconnect the devices without interrupting the bus or the
communication.
1 HSE network
2 H1 bus
3 Intrisically safe, explosive area
B1+B2 Bridge = coupling element for H1 bus
and HSE network
D1-D3 Device = field devices, own power
supply, for non potentially explosive
areas
D4-D6 Intrinsically safe devices, external
power supply, for potentially explosive
areas
I.S. Intrinsically safe barrier
JB Junction box for field devices
PS Power supply
Switch = connection of multiple HSE
sub networks
T Terminator
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