Videx GSM Lite 4000 Series - General Directions for Installation; Cable Size Guide; General Installation Notes; Lock Release Wiring and Back EMF Protection

66250756-EN - V2.1 - 05/11/19
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4000 Series GSM Lite Audio Intercom - Technical Manual
4000 Series GSM Lite Audio Intercom
CABLE SIZE GUIDE
POWER SUPPLY AND LOCK RELEASE CONNECTIONS
Refer to the table below for the connections for the power supply output to the Art.4811 GSM LITE intercom and the lock release
connections.
Distance 20m 50m 100m
Cross Sectional Area (CSA) 0.5mm
2
1.0mm
2
1.5mm
2
Ideally the power supply should be located as close to the intercom panel as possible for best performance. The maximum
acceptable resistance for the above cables = 3 or less for best possible performance.
IMPORTANT NOTE: Only bare copper (BC) cable should be used (solid or stranded is acceptable). Please be aware that when
selecting a cable the following should NOT be used: Copper Coated Steel (CCS) and Copper Clad Aluminium (CCA). While these
types of cable may oer a low cost solution they will have a higher resistance than pure copper cable and can aect the overall
performance of the system therefore Videx DO NOT recommend these types of cable.
GENERAL INSTALLATION NOTES
• Check that all components are free from damage before installing (do not proceed with installation in the event of damage).
• Keep all packaging away from children (please dispose of any excess waste and packaging responsibly).
• Do not obstruct the ventilation openings or slots on any of the devices.
• All connections to mains voltages must be made to the current national standards (I.E.E. wiring regulations for the UK or the
appropriate standards of your country if installing overseas).
• Install an appropriate fused spur or isolation switch to isolate the mains.
• Isolate the mains before carrying out any maintenance work on the system.
• Avoid water ingress into the rear of the module, always seal the module frame after installation using a suitable silicon based
sealant.
• All intercom and access control cables must be routed separately from the mains (ideally in a separate cable tray or duct).
LOCK RELEASE WIRING AND BACK EMF PROTECTION
When tting an electric lock release back EMF protection will be required. If tting an AC lock release then a 100nF ceramic disc
capacitor should be tted across the terminals of the lock, shown in Fig.23. If tting a DC lock release (fail secure or fail safe) then
a 1N4002 diode should be tted across the terminals on the lock, shown in Fig.24.
100nF CAP
+
-
1N4002 DIODE
Fig. 23 Fig. 24
If a 100nF ceramic disc capacitor or a 1N4002 diode are not available then a 14 - 20V MOV (metal oxide varistor) can be tted across
the lock terminals instead (refer to Fig.23 above) and can be tted on both an AC and DC lock. Connection examples can also be
seen on the various wiring diagrams on pages 15 - 17.
General Directions for Installation