Grounding - Lab.gruppen PLM 20K44 Operation Manual

If the mains plug (AC plug) fitted to the mains cable (AC cord) is not appropriate for your country, it can be removed
and a locally-sourced one fitted instead, observing the color coding in the table below:
powerCON pin
L
N
Green/Yellow
Table 3.1: AC Plug Configuration
If you are not 100% confident of your competence to replace the mains plug (AC plug), the task should be carried
out by qualified personnel.
Once a suitable AC power supply is connected, the device can be turned on using the front panel power button.
When the device is turned on, the power button LED changes from red (Standby) to green (Active).
Note: In-rush current is controlled and limited during the soft-start sequence. This enables multiple
PLM+ units on the same AC mains circuit to be turned on simultaneously

3.5. Grounding

Analog inputs feature Iso-Float™ ground isolation, a technology which combines the benefits of transformer
coupled isolation with the advantages of clean, direct-coupled inputs.
The audio converters are galvanically isolated, and not connected to mains ground. High-speed transformers and
opto-isolators create a barrier between the device and the outside electrical environment.
Note: The Iso-Float feature is activated by default, but may be disabled via the Lake Controller software,
or via the front panel menu.
Use correctly-shielded balanced audio input connections to minimise hum and interference. Please refer to section
8.2.4 for further information.
NEVER disconnect the earth (ground) pin on the mains cable (AC power cord).
Brown
Blue
PLM+ SERIES Operation Manual rev 1.0.0
3. Installation
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