ACO CDNP7ACC - E-Lock and Alternative Device Connections

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In case of active audio receivers (that require power supply), the door entry unit
uses 15VDC DC power supply, connection to +DC (ELOCK+) and GND (LINE-)
terminals. Same can also be used for passive receivers.
For VIDEO systems, 15VDC supply voltage is connected to combiner module
terminals: +15V and GND. In both cases the recommended power supplies are
available from ACO.
It is possible to connect a buffer power supply to the same terminals (buffer power
supply must ensure 15V, alternatively use an off-the-shelf inverter that supplies
15V from 12V to 15V input voltage).
3. Connecting the E-lock:
E-locks without any specific polarity are connected to "ELOCK" output terminals.
This output is used for direct connection of the E-lock; it generates AC voltage
during opening (hence the outside unit may be supplied from a DC voltage
source). It is recommended to use (non-reversible) E-locks that work on 8V to
12V.
It is also possible to connect a reversible E-lock (opens when de-energised). This
option can be activated by in the installer's menu No. P10 and upon closing the
Z13 jumper (under the resistor on the left side of the board). In this case,
"ELOCK" is energised when in standby and de-energised during opening. When
power supply is provided from a transformer and a reversible E-lock is used,
transformer power is calculated using the following formula: P[W] = (12V * E-lock
current [A] + 4W) * 1.6. Insufficient transformer power causes "buzzing" during
conversation. 15VDC power supply is recommended. Note! In case of reversible
E-locks, voltage appears at the "ELOCK" output depending on the power supply
or transformer used - use suitable reversible E-lock. It is also possible to use the
MOD-DC-12V module for 12VDC power supply of reversible E-lock if the door
entry unit is supplied by a 15VDC power supply or a transformer.
4. Connecting another device in place of an E-lock:
If E-lock needs to be replaced by another device instead, use a relay (12V coil)
connected to "ELOCK" terminals with an additional 100 - 470µF electrolytic
capacitor (depending on relay type), as per the diagram:
ACO offers off-the-shelf CDN-PK modules.
Relay contacts can be used as needed - it is recommended to power the unit
connected to relay contacts from a separate power supply. Do not connect other
inductive loads (such as an E-lock) via a relay from the same transformer that
powers the door entry unit.