Alphatech Fermax PBX EXP Installationsanleitung PDF herunterladen (Seite 13)

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

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Alphatech Fermax PBX EXP Installationsanleitung Seite 13