Siemens SIMATIC HMI Operating Instructions Manual page 89

● Terminate the shielding of the data cable on the HMI device flush and near the
● Route the equipotential bonding conductor and data cables in parallel with minimum
Wiring diagram
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②
③
④
⑤
⑥
⑦
⑧
Industrial USB Hub 4
Operating Instructions, 09/2007, A5E00471973-02
equipotential busbar using suitable cable clamps.
clearance between these. See the connection diagram.
NOTICE
Equipotential bonding conductor
Cable shielding is not suitable for equipotential bonding. Always use the prescribed
equipotential bonding conductors. The minimum cross-section of a conductor used for
equipotential bonding is 16 mm². When you install MPI and PROFIBUS DP networks,
always use cables with a sufficient crosssection since otherwise the interface modules
may be damaged or destroyed.
Power connection to the Industrial USB Hub 4 with PE
Equipotential bonding, cross-section: 1.5 mm
Cabinet
Equipotential bonding conductor cross-section: min. 16 mm
Ground connection
Cable clip
Voltage bus
Parallel routing of the equipotential bonding conductor and data cable
Mounting and Connecting
4.4 Connecting the Industrial USB Hub 4
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