Lencore Spectra i.Net: Installation and Operations Manual - Manual (Page 24)

section 5
5.6 | power supply
NOTE
Be sure ground cable is run between i.Net OPs.
Use the (-) Negative terminals IN and OUT appropriately.
WHEN AN ADDITIONAL POWER SUPPLY NEEDS TO BE ADDED:
Typically, one power supply is needed for 3 i.Net OP's with paging and/or music (6, masking only).
WIRING BETWEEN POWER ZONES:
Add a ground wire between OPs (negative or conductor wire). DO
NOT CONNECT THE POSITIVE WIRE BETWEEN OPs.
1
20