
BASIC SYSTEM DIAGRAMS
sec.1a
−−−−
55
DOOR PHONE SYSTEMS
DOOR PHONE - VIDEO DOOR PHONE SYSTEMS: Installation Diagrams
SC101-0567E
CONNECTION OF TWO INTERCOMMUNICATING DOOR PHONE EXTENSIONS
TO A SYSTEM WITH DOOR UNIT
Parallel calls from door unit
Differentiated calls
-/~
+/~
-/~
+/~
(VX.006)
(VX.021)
(C4.014)
(C4.014)
(VX.021)
CALL
47
3W
POWER SUPPLY
MAIN~
FROM
RISING
COLUMN
RELAY
BOX “A”
RELAY
BOX “B”
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