Operation Of The Cdnp Unit; Installation Of The Unit - ACO CDNP6ACC User Instruction

V.

OPERATION OF THE CDNP UNIT

The unit can be used with uniphones featuring digital decoding, such as:
INSPIRO, INS-UP720 or INS-MPR type (3.5 inch and 4 inch) monitors.
Terminals of all uniphones are connected in parallel to corresponding "Line +"
and "-" terminals of the unit. For video systems, the monitors should be
connected via active splitters (CDNVRa). In the standby mode of the unit, the
voltage on uniphone line (audio line) is approx. 9V, while during calling it goes
up to approx. 12V.
As the handset is picked up (uniphone activated), the line is loaded and the
voltage drops to approximately 5 V, which the unit recognises as permission to
connect the call. If voltage drop below 5V other then during a connection or a call
is recognised as a short-circuit by the unit - the display shows "LineEr". The line
is then de-energised and checked, at certain time intervals, if the short circuit is
still present. When the correct state of the line is detected (when short circuit
ceases), the unit is automatically restored to normal operation.
The E-lock is controlled by AC voltage generated by the unit and specially formed
for this purpose, therefore it is possible to supply the unit with DC voltage source
- for instance a buffer PSU with a battery.
VI.

INSTALLATION OF THE UNIT

Install the unit on building wall (vestibule, sheltered wall, east wall, etc.) so that to
minimise the effect of adverse weather conditions. The recommended height of
installation of the unit is such that it can be used by children (some 1.35 m) and
persons with disabilities (persons with sight impairment, in wheelchairs, etc.).
Make sure that the panel of video systems is installed at the desired height.
Typically that height is 1.60 m from the ground. For optimal field of view of the
camera, verify the installation location and position of the panel by trial and error.
CDN-I/O Input-Output Module
This module features two programmable
ports: P1 and P2. Each of these ports has an
INPUT and a relay OUTPUT.
Inputs can be used for calling or opening and
outputs can be used as control of opening an
additional entrance gate, switching on the
staircase lighting, etc. Module parameters
are set using the P18 program. Refer to page
52 for module configuration description.
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