Bellcall Digital Door Entry System
PD-083 Issue 3A
Installation and Operating Manual
Page 14 of 46
Powered bolt, shoot-bolt or other more secure door locking systems may require the use
of separate power supplies or having suppressors fitted. Shoot-bolt systems for instance
tend to require at least 1.5A peak current and this will require the use of an isolation relay
and normally a separate power supply for the lock.
Exit Button Input
The exit button is used to unlock the door for the lock operating time. The input is only for
a normally open push button. ‘Exit +’ is the input and ‘Exit –’ is internally connected to 0V.
The input can also be used for connection to other equipment to open the door as shown
in the interconnection diagrams K and L.
Door Open Switch – BSD-DIG only
The door open switch is used to provide an indication at the phone that the door has been
left open. This switch can have closed contacts when the door is closed or open contacts
when the door is closed, the choice being made in Panel Programming. The default of
‘contacts open when door closed’ must be selected when this feature is not required.
Time Clock Sharing
In a large system the time clock can be shared between distributed entrances by using
one of the Cat5 common wires for the common time clock signal. Se the detailed diagram
on page 42.
Commissioning
The many components of the Bellcall Digital system are fitted with high quality pluggable
screw terminal blocks. This enables all the connections to the system to be fully
completed, whilst easily isolating individual pieces of equipment during testing and
commissioning.
When powering up for the first time, it is highly recommended that only the most basic
system be connected. i.e. 1 phone, 1 door controller and panel, the remaining equipment
can be isolated by removing terminal blocks at the video and door controllers.
Proceed to test the system by calling the phone from the door panel in the usual way. Any
problems can be resolved by rechecking wiring and connections, assisted by the various
suggestions and tests in the section “Troubleshooting”. Once the basic system is fully
functioning, continue to reconnect and test the remaining equipment item by item until
completed.
