Fermax PBX CAM, User And Installation Manual

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or for 12V - 24VDC (direct), max. cnsumption is 250mA (+ 3,5mA x number
of visit cards).
11. Switching contact of
2nd relay
(NO=normally open, NC=normally closed
and COM= common terminal of the relay)
12. Switching contact of
1st relay
(NO=normally open, NC=normally closed
and COM= common terminal of the relay)
13. Grounding connector
GND
– it is used for antistatic protection, especially
for installation at places with marble floor, or if the plastering with
polystyrene is used, then there is quite often the static electricity available.
By grounding the door phone panel you will avoid unneccessary problems,
so we strongly suggest to use the grounding connector!
14. Connection of the telephone line