Laskomex CD-2502 Series Installation, Service And Programming Manual page 17

6.1 Performance of wiring system
a uniphone and an electronic cassette should not exceed 150m for wire dia.
0.5 mm. This distance can be extended by increasing the cross-section of
connecting wires.
Figure 4: Method of connecting uniphones to electronic cassette.
Wiring system of entry phone in video version
Section between external panel and electronic cassette should not exceed 15 m.
Spiral wire of dia. min. 0.5 mm and impedance 100, 124 or 136 Ω should be
used. Minimal number of entry phone wires amounts 18 for entry phone without
gateway drive control and 20 with gateway control.
Number of wires can be limited if door opening button and list of occupants
are not used in the entry phone.
For the connection of electronic cassette with external panel spiral wire should
be used. For routing in the earth, wire protected against moisture should be
used. Wires YTDY, YTKSY, UTP, LAN T11 or similar are recommended.
During wire connection a special attention should be paid to correct pairing of
connections. On the diagrams a spiral pair is marked with thick and thin line
with grey filling between them.
In a multi-entrance system an electronic cassette at the main entrance
(EC-2502/H) should be connected with all electronic cassettes at the sub-
ordinate entrances (EC-2502/U). A spiral with min. two wires should be used
(at gate control two additional wires should be reserved).
Connection between electronic cassette and uniphones should be made by
means of any double wire e.g. YTDY. In case of gate control min. 4 wire
conductor should be used.
Signal video in CD-2502 system is sent by symmetrical line. Such solution
ensures low susceptibility of line to external interferences and enables sending
picture at relatively long distances, however it requires observing the regulations
during the performance of wiring system.
2
EC-2502/U
4
230 VAC
Power supply
16
6 INSTALLATION AND ACTIVATION
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