Lenze 8400 protec Manual - Manual (Page 32)

Product description
Concepts for the mains connection
Concepts for the connection of the power bus
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32 EDS84DPS424 EN 5.0
3.6.2 Concepts for the connection of the power bus
Spacious plants are often organised in lines. A clearly structured cable routing leads to a
typical line topology. Two connection types are used:
ƒ Loop−through technique from device to device
– Here, the mains voltage and the 24 V buffer voltage are applied at X10 and X11 at
the same time.
ƒ Branch of power distributors
Depending on the type of cables and the 24 V supply, the following implementations are
possible.
Possible loop−through arrangements:
Standard cable
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The mains voltage is distributed among the devices by means of a standard cable (plugs
X10 and X11). The 24 V supply of the controller is generated inside the device
(mains−operated supply). After the mains voltage has been switched off, all device
functions including the control electronics are deactivated. The switch function of
Ethernet fieldbuses is also inactive.
Hybrid cable with external 24 V buffer voltage
‚
The mains voltage and an external 24 V buffer voltage (self−contained) are distributed
among the devices using a cable (plugs X10 and X11). Depending on the state of the
external 24 V supply, it is possible for the control electronics to remain active even if the
mains is switched off.
Arrangements including power distributors:
Standard cable including power distributors ƒ
The mains voltage is carried in a cable and distributed to the device by power distributors
(plug X10). The 24 V supply of the controller is generated inside the device (mains−operated
supply). After the mains voltage has been switched off, all device functions including the
control electronics are deactivated. The switch function of Ethernet fieldbuses is also
inactive.
Hybrid cable with power distributors and external 24 V buffer voltage
„
The mains voltage and the 24 V buffer voltage are carried in a cable and distributed to the
device by power distributors (plug X10). Depending on the state of the external 24 V
supply, it is possible for the control electronics to remain active even if the mains is
switched off.