ABB APC Instructions D'installation, D'utilisation Et D'entretien page 17

3.4.5. Slave (AUX) to master (PIL) unit connection (for master unit + slave unit
configuration)
In a master unit + slave unit configuration an interconnection cable must be installed between the units. This
cable is factory wired in the slave unit and allows a full control of the slave unit from the master unit. Note
that only one slave unit can be added to each master unit and the slave unit must be of the same type
(APCL2 with APCL2, APCM2 with APCM2 and APCR with APCR).
Please follow the below instruction carefully for proper connection:
Free and unwind the interconnection cable that is temporally arranged in the bottom part of the slave unit.
Take away the black grommet from the bottom plate of the enclosure. Beware the grommet shape is not
symmetrical hence look at its orientation (and even tag it). Please refer to Step 1 and Step 2 on the figure
below.
Put the interconnection cable through the grommet then through the hole from which the grommet has
been taken away. Refer to Step 3 on the figure below.
Once the whole cable length is out of the units, replace the grommet to its initial position. Refer to Step 4
on the figure below.
Depending on the installation and the type of capacitor bank, pass the cable below the enclosure or
behind the plinth. Always follow good practice of electrical installation when installing the interconnection
cable.
In the master unit, take away the black grommet from the bottom plate. You will need again to put it back
hence look at its orientation (and even tag it).
Put the interconnection cable through the hole from which the grommet has been taken away then
through the grommet.
Once the whole cable length is inside the enclosure, put the grommet back to its initial position.
APC - Chapter 3. Installation
Step 1
Step 3
Figure 3.9. Slave to master unit connection
Step 2
Step 4
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