25H/SP/DDA/2W - TECHNICAL MANUAL
EN-UK - V.1.2 - 04/01/16
29
VIDEX
25H/SP/DDA/2W
(1 way “2 wire” DDA audio intercom kit)
+
-
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 flammable 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 qualified 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
