Edwards Signaling EBPS Remote Booster Power Supply - Manual (Page 49)

Remote Booster Power Supply Technical Reference Manual 43
Understanding BPS synchronization
When using Genesis devices, the activation of the visible and audible output
circuits on the BPS are determined by how the BPSs are connected. No matter
how BPSs are connected, their outputs are “in sync” but there is an output
activation delay of either one or four seconds. This section details how BPS
outputs work based on how they are connected.
Connection of booster power supplies
Multiple BPSs can be connected in parallel. How you connect your BPSs affects
the synchronization of your system’s outputs.
BPSs can be connected in parallel using their sense circuits. When connected
via the sense circuits, all BPS outputs have either a one- or four-second delay
from the time the driver NAC turns on to the time the BPS NACs turn on. The
four-second delay does not comply with UL 864 9th edition. Delay time is
controlled by DIP switch SW1-4. See “Setting the DIP switches” for more
information.
Figure 22: BPSs connected in parallel with sense circuits
(2)
(3)
(4)
(1)
(5)
(5)
Legend
(1) NAC
circuit
(2) BPS 1
(3) BPS
2
(4) BPS x
(5) Sense circuit
Notes
•
To ensure all BPSs are synchronized in a Genesis application, the driving NAC must provide
the Genesis synchronization pulse. Therefore, the BPSs must not be set to Genesis mode.
• The quantity of BPSs that can be connected is limited by wire run length and available
current.