21
1 Electrical installation
Operation Manual Supply Unit SO CM-P BG1+2
ID no.: 1400.201B.5-00 Date: 02/2020
Electrical installation
4
Electrical installation
NOTE:
On installing the supply unit in the axis group it is imperative the Operation
Manuals for the other devices (axis controller, controller) are also followed.
4.1 Before you start
During the installation work
it is imperative you avoid ...
y
Screws, cable residue or other foreign bodies falling into the device
y
Moisture entering the device
It is imperative you pay attention to the following warnings and safety instructions before
and during installation.
DANGER!
Risk of injury due to electrical power!
Carelessness will result in serious injuries or death.
x
Never make or disconnect electrical connections while they are electrically live! Always
disconnect the power before working on the device. Even 10 min. after switching off the
mains supply, dangerously high voltages of ≥ 50 V may still be present (capacitor charge). So
check that electrical power is not present!
x
Only once the DC Link voltage has dropped to a residual voltage of less than 50 V (to be
measured at the DC link busbars) is it allowed to work on the device.
x
Any existing additional DC link connections as well as the connections for all components in
the mains input area are to be checked in relation to each other and in relation to earth to
ensure they are not carrying any electrical power. If necessary, all cable connections are to be
discharged using suitable means.
x
Pay attention to warning sign on the device (see front of device)
DANGER!
Risk of injury due to electrical power!
Carelessness will result in serious injuries or death.
x
A dangerous voltage may be present at the device, even if the device does not emit any visual
or audible signals/indications (e.g. with mains voltage applied to terminal X8 and missing
supply from switched-mode power supply on X7!
x
Pay attention to warning sign on the device (see front of device)
4.2 Effective EMC installation
Compliance with the EMC Directive
Commissioning (i.e. start-up of intended usage) is only permitted while strictly complying
with the EMC Directive (2014/30/EU). The installer/operator of a machine and/or system
must provide proof of compliance with the protection targets stipulated in the standard.
The essential EMC measures are already implemented in the design of the devices in
the form of optimised housing shielding, printed circuit board layout, filter measures and
selection of suitable connectors with shield plate. In addition to the internal measures,
the following installation measures are to be noted:
Routing of cables
y
If possible, signal cables should only enter from one side into the switch
cabinet.
y
It is recommended to twist lines of the same electric circuit.
y
Avoid unnecessary cable lengths and "loops of spare cable".
Shielding measures
y
Do not strip back the cable shields too far and use the shield lugs on the related
connectors for making the connection to the components
(see Figure 4.1). Connect the other end of the cable shield to the PE rail (main
earth) or the backing plate using a large area connection.
Cable type
y
Use only shielded cables with double copper braiding with 60 to 70 %
coverage. To connect KEBA servomotors we recommend the usage of pre-
assembled motor and encoder cables from KEBA, as all EMC tests have been
undertaken successfully with these cables.
Mains filter
y
Please use the mains filter recommended by KEBA.
Mains choke
y
We recommend the utilisation of mains chokes in harsh industrial systems.
y
To reduce the system interactions of the peak system currents and increase the
service life of the DC link capacitors.
