External Paging Adapter And Loud Ringing Bell - Panasonic Digital Business System Installation Manual

Panasonic Digital Business System - Installation Manual
March 1997 Issue 5

External Paging Adapter And Loud Ringing Bell

The External Paging Adapter (EPA) VB30966 comes with a factory fitted connector. The EPA is connected to
CN21 inside the DBS. The output side of the EPA has four screw terminals which are used to connect the paging
or bell equipment. The EPA contains an isolating transformer and relay whose out contacts are normally open.
The relay is rated at 400mA / 48v dc maximum.
When external paging is invoked the relay contacts close and the audio is fed via the transformer to the paging
system. In this case the relay can be used to switch the amplified input of amplifiers which support this function.
In the Loud Ringing Bell (LRB) mode the relay closes and remains closed until the call causing the ringing is
answered elsewhere in the system. In this mode the relay should be used to trigger a bell circuit.
Sourcing of paging systems and external bell circuits, when used, is the responsibility of the installer.
Once the hardware has been installed system programming is required to enable and configure EPA or LRB
functions.
Figure 18 - External Paging Adapter Connections
22