Videx 4000 Series Technical Manual page 31

4000 Series GSM Audio Intercom with Proximity
General Directions for Installation
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 should be fitted across the terminals of the lock, shown in Fig.45. If fitting a DC lock release (fail secure or fail safe) then
a 1N4002 diode should be fitted across the terminals on the lock, shown in Fig.46.
100nF CAP
Fig. 45
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.45 above) and can be fitted on both an AC and DC lock. Connection examples can also be
seen on the various wiring diagrams on pages 20 and 21.
CONNECTION TO MAINS, SAFETY AND GUIDANCE NOTES
IMPORTANT: PLEASE READ THESE INSTRUCTIONS CAREFULLY BEFORE COMMENCING WITH THE INSTALLATION.
IMPORTANT: IT IS RECOMMENDED THAT ANY CABLING AND VIDEX PRODUCTS BE INSTALLED BY A COMPETENT
AND QUALIFIED ELECTRICIAN, SECURITY INSTALLATION SPECIALIST OR COMMUNICATIONS ENGINEER.
• DO NOT install any Videx product in areas where the following may be present or occur:
• Excessive oil or a grease laden atmosphere.
• Corrosive or flammable gases, liquids or vapours.
• Possible obstructions which would prevent or hinder the access and/or removal of the Videx product.
MAINS CONNECTION
The system MUST be installed in accordance with the current I.E.E. regulations (in particular I.E.E. Wiring regulations BS7671 for the
UK), or the appropriate standards of your country if installing overseas, in particular Videx recommends:
• Connecting the system to the mains through an all-pole
circuit breaker (refer to Fig.47) which shall have contact
separation of at least 3mm in each pole and shall disconnect
all poles simultaneously.
• That the all-pole circuit breaker shall be placed in such a
way to allow for easy access and the switch shall remain
readily operable.
• Ensuring that the mains supply (Voltage, Frequency and
Phase) complies with the product rating label (this is usually
located on the topside of the power supply).
• Isolating the mains before carrying out any maintenance
work on the system.
4000 Series GSM Audio Intercom - Technical Manual
1N4002 DIODE
Fig. 46
1 PHASE
SUPPLY
(220 - 240Vac,
50/60Hz)
Fig. 47
- 31 -
+
-
N
FUSE
L
SWITCHED
FUSE SPUR
66250754-EN - V1.0 - 18/02/19