V-Tec VIDEO DOOR PHONE SYSTEM Manual download pdf (Page 7)

INSTALLATION DIAGRAMS

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DOOR PHONE - VIDEO DOOR PHONE SYSTEMS: Installation Diagrams

INSTALLATION DIAGRAMS

INSTRUCTIONS FOR INSTALLER

The products described in this technical manual must be used as

expressly intended only, i.e. to build door phone and video door phone

systems.

Any other use must be considered inappropriate and, them, dangerous.

The constructor can not be considered liable for casual damages due

to inappropriate, wrong and irrational use.

• The system must be built in compliance with the regulations in

force.

• Check that the device is intact after removing it from the packaging.

(do not proceed with installation in the event of faults);

• Keep the packaging (plastic bags, polystyrene, etc.) away from

children. Packaging is potentially dangerous.

• Before connecting the set install an appropriate separation and

protection switch.

• Before connecting the set verify that the data label correspond to the

mains ones.

• Ensure that the conditions and data shown in the instruction booklets

are respected for the entire life of the device;

• Do not obstruct the openings or fessures for ventilation or heat

elimination.

• Before any cleaning or maintenance operation, disconnect the set

by means of the system switch.

• In case of failure and/or malfunctioning of the set disconnect it by

means of the general switch and do not damage it. (To repair the set

contact Urmet after sales services)

• Do not open or tamper with the monitors: HIGH VOLTAGE live parts

inside.

• Avoiding knocking or dropping the device to avoid breaking the

kinescope with consequent projection of glass fragments.

If the above mentioned prescriptions are not followed, the set safety

can be compromised.

The installer must verify that the notices for user are present on the

slave sets.

CONDUCTOR CROSS-SECTION

• Connection of traditional call door phone, 4+n wire electronic call

door phone or coax video door phone systems:

Conductor cross-section depends on the length of the connections

and must be able to guarantee a total resistance of less than 5 Ohm

on each.

Distance [m] Cross-section [mm

]

Call and speech circuit

50 0,5

100 0,5

200 0,8

300 1,0

Door release circuit

50 0,5

100 0,8

200 1,0

300 1,6

Video circuit (°)

50 0,8

100 1,0

200 1,6

300 2,5

(°) Data in the table refers to the camera and monitor power wires; a

75Ω coax wire (e.g. RG59 U75Ω) is required for the video signal.

In the table, the maximum distance is to be interpreted as between the

call station and the furthest door phone or video door phone.

For longer distances:

A) Suitably increase circuit wire cross-section area for voice and call

circuit.

B) Use of a back-up relay for operating door lock circuit is

recommended.

C) Installation of a video distributor Ref. 1794/4A is needed for the

coax wire.

In intercom systems it is advisable never to exceed 200 meters.

• Connection of 1+1 wire electronic door phone or 5-wire video door

phone systems.

The system works correctly with a maximum total (forwards and

backwards) line resistance of 12Ω.

Use the following wire cross-section areas according to distance:

Distance [m] Cross-section [mm

]

Call and speech circuit (terminals 1, 2, CA)

50 0,35

100 0,75

200 1,0

Video door phone power negative (terminal R1)

50 0,75

100 1,5

200 2,5

Video door phone power positive (terminal R2)

50 0,5

100 1,0

200 2,0

Video signal (terminals A, B)

50 0,35

100 0,35

200 0,35 double

Maximum length is between door unit (panel) and the most distant

apartment station (door phone or video door phone).

Up to two house phones can be connected in parallel.

Note: in all sistem foresee the wires for push button panel lamps

lighting with an adequate power transformer (for up to 2 lamps

the system transformer can be used), as well as the wires for

the electric lock opener next to the door.

WIRE LAYING

The wire laying of systems with different voltages is possible not only

in separated conduits but also in the same conduit. In this case all the

wires have an insulation suitable to the highest rated voltage. Wires

of systems incompatible each others as power and telephones TV

antenna, data transmission, must have different conduits and boxes.

By using external conduits it is possible to fail to observe this rule, on

the condition that the incompatible systems are separated by means of

a diaphragm. The internal diameter of the conduits has to be at least

1.3 times the diameter of the circle circumscribed to the wire group that

the conduits have to include, with a minimum of 10 mm.

Never use telephone cables; false calls may occur in installations with

long lines due to problems of cross-talk.

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V-Tec VIDEO DOOR PHONE SYSTEM Manual Page 7

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