FOUNDATION Fieldbus H1

Data transmission

MBP

Transmission rate

31.25 Kbps

Cable

2-wire shielded

Topology

Line, tree, ring

FF devices per segment/FF Link

31

Active field distributors per segment/FF Link

• AFD

8

• AFDiSD or combinations of AFDiSD and AFD

5

Max. total current consumption of all FF field devices

0.5 A

Cable length per segment

1 900 m

Bus segments with AFD

Max. spur line length related to the total number of spur lines

Number of spur lines (1 device per spur line)

• 1 to 12 spur lines

120 m

• 13 to 14 spur lines

90 m

• 15 to 18 spur lines

60 m

• 19 to 24 spur lines

30 m

• 25 to 31 spur lines

1 m

Bus segments with AFDiSD

Max. spur line length independent of total number of spur lines

Number of spur lines (1 device per spur line)

• 1 to 31 spur lines

• Not intrinsically-safe

120 m

• Intrinsically-safe acc. to FISCO

120 m