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From previous unit (if present)
Control board in the 'previous' unit
In order to terminate the bus correctly, the fourth switch (counting from left to right) from DIP switch 22 has to be set
as follows:
– High: For the first unit in a filter system (single unit filter or first physical unit of a multi-unit filter)
– High: For the last physical unit of a multi-unit filter
– Low: For all the other units
WARNING: Failing to terminate the communication bus properly will lead to equipment malfunction and
equipment damage.
5.3. Step 3: Voltage rating check/adaptation and phase rotation check
The active filter nominal voltage setting must be adapted to the actual network voltage for the auxiliary circuit by ad-
justing the power supply connection of the control voltage transformer. Ensure that the filter panel is isolated upstream
before changing the power supply connection of the control voltage transformer. The factory default setting is done at
the highest tap (480V: 230V for V1 range & 690V:230V for V2 range). For PQFS the maximum system voltage
should not exceed 415V.
Note that in addition to configuring the unit hardware for a certain voltage range, the network voltage also has to be
set up in the filter controller software (commissioning window).
WARNING: The PQFS should not be connected to systems for which it is known that the overvoltage (+10%)
will be sustained indefinitely.
– The voltage phase rotation at the active filter incoming power supply terminals must be clockwise (L1 (R, U) -> L2
(Y, V) -> L3 (B, W) -> L1 (R, U)).
WARNING: Applying voltage to the filter to check the phase rotation may only be done after ensuring that the
network voltage level is acceptable for the filter operation and after it has been found that the filter is not me-
chanically nor electrically damaged.
STATUS
Approved
Figure 20: Communication bus between different filter units
SECURITY LEVEL
Public
Control board in the 'next' unit
DOCUMENT ID
9AKK107045A4703
Q UICK STA RT-UP G UI DE
To next unit (if present)
REV.
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