you can silence the audible signaling devices and
leave the visual signaling devices active until alarm
conditions cease.
For example, a connection similar to the wiring
diagram in Figure 13 activates the flasher, the bell
and the visual and audible signaling device of the
self-powered siren in alarm conditions.
Using the SILENCE button stops the horn, but not
the flasher, which continues to signal alarm status
until you press the RESET button.
FC503 and FC506 Addressable Fire Control Panels 29
Johnson Controls - CONFIDENTIAL