Panasonic EverVolt Mini EVAC-105-2 Installation Manual page 38

Battery Connection & Charging Requirements
Step 5. Switch the "S <-> M" slider switch to "M" position.
Step 6. Connect up to eleven other communication cables starting with
the "M" (primary) module, from the "LOW" to "HIGH" with the Ethernet
RJ-45 cables. Up to 10 total modules may be string together (one –
Primary and one to eleven – Secondary).
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