Star Hub (Multiport Tap)

Shorter drop line lengths must be maintained when passive distributors ("multiport taps"), such as the Beckhoff ZS5052-4500 Distributor Box. The following table indicates the maximum drop line lengths and the maximum length of the trunk line (without the drop lines):

Baud rate

Drop line length with multiport topology

Trunk line length (without drop lines)

1 Mbit/s

< 0,3 m

< 25 m

500 kbit/s

< 1,2 m

< 66 m

250 kbit/s

< 2,4 m

< 120 m

125 kbit/s

< 4,8 m

< 310 m