Conventional Systems Technical Manual - Alcad

CHARACTERISTICS OF COAXIAL CABLEIn electronic video door entry installations where the video signal is transmitted via coaxial cable, use coaxial cable with a characteristicimpedance of 75 ohm to obtain a high-quality video signal and to ensure correct functioning.In addition, remember that the coaxial cable line of the installation should be charged with 75 ohm. The tap-offs and the connectionbrackets include a 75 ohm end-of-line resistor.CHARACTERISTICS OF TWISTED PAIRIn electronic video door entry installations where the video signal is transmitted via twisted pair, use twisted pair of category 5eor of equivalent characteristics to obtain a high-quality video signal and to ensure correct functioning.In addition, remember that the twisted pair line of the installation should be charged with 120 ohm. The tap-offs and the connectionbrackets include a 120 ohm end-of-line resistor.DOOR ENTRY INSTALLATIONS. ELECTRONIC CALL.CONVENTIONAL 4+N SYSTEMSTANDARD INSTALLATION IN BUILDINGCONVENTIONAL 4+N SYSTEMStandard wiring diagram for door entry installations with electronic call in buildings with a single point of entry.SINGLE-WIRED DIAGRAM5 5TEL-001LAST FLOORTEL-0015 5TEL-001GROUND FLOORTEL-0014+NALA-040 (230 V )230 VV(1)22POINTOF ENTRYMAN-410+MPD-004+CMO-004(3)1234SECTION TABLEAWGUp to 50 metres1 mm 2 1.1 mm 17Up to 25 metres0.5 mm 2 0.8 mm 20Up to 100 metres2 0.25 mm 0.6 mm 222 0.5 mm 0.8 mm 202 0.75 mm 1.0 mm 182 1 mm 1.1 mm 17ABR-001(2)(1) Use separate cable hose(2) Max. 12 Vac, 800 mA(3) Section according to the numberof telephones in the dwelling197