66251750-EN - V1.0 - 05/06/17
17
4000 Series Vandal Resistant Digital GSM - Technical Manual
4000 Series Vandal Resistant Digital GSM Audio Intercom with Proximity
CABLE SIZE GUIDE
Refer to the table below for the connections for the power supply output to the Art.4812/Art.4812R digital GSM 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 = 3Ω 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 offer a low cost solution they will have a higher resistance than pure copper cable and can affect 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.
• 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 or the
appropriate standards of your country).
• 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.
LOCK RELEASE WIRING AND BACK EMF PROTECTION
When fitting an electric lock release back EMF protection will be required. If fitting an AC lock release then a 100nF ceramic disc
capacitor must be fitted across the terminals of the lock, shown in
Fig.16
. If fitting a DC lock release (fail secure or fail safe) then a
1N4002 diode must be fitted across the terminals on the lock, shown in
Fig.17
.
100nF CAP
+
-
1N4002 DIODE
Fig. 16
Fig. 17
If a 100nF ceramic disc capacitor or a 1N4002 diode are not available then a 14 - 20V MOV (metal oxide varistor) can be fitted across
the lock terminals instead (refer to
Fig.16
above) and can be fitted on both an AC and DC lock. Connection examples can also be
seen on the wiring diagrams on page 11.
General Directions for Installation
