25H/SP/DDA/2W (1 way “2 wire” DDA audio intercom kit)
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100nF CAP 1N4002 DIODE
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 on the lock and if fitting a DC
lock release (fail secure or fail safe) then a 1N4002 diode must be fitted across the terminals on the
lock, this is shown in Fig.3 below.
Fig.3
AC Lock DC Lock
CONNECTION TO MAINS, SAFETY AND GUIDANCE NOTES
IMPORTANT: PLEASE READ THESE INSTRUCTIONS CAREFULLY
BEFORE COMMENCING WITH THE INSTALLATION.
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 ammable gases, liquids or vapours.
• Possible obstructions which would prevent or hinder the access and/or removal of the Videx product.
Videx recommends that any cabling and Videx product be installed by a competent and qualied electrician,
security installation speclialist or communications engineer.
The system MUST be installed in accordance with the current I.E.E regulations (in particular I.E.E Wiring
regulations BS7671), or the appropriate standards of your country, in particular Videx recommends:
• Connecting the system to the mains through an all-pole circuit breaker (refer to Fig.4A on page 30) 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.
• Isolating the mains before carrying out any maintenance work on the system.
Mains Connection
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