9
Chapter 2 – Operation
All Normal Operation
When the Keltron S/FDACT is powered, and the input zones and other monitored status conditions are
normal, only the green power on LED will be lit. All other LEDS will be dark. The audible will be silent.
The general alarm and general trouble relay contacts will be in their normal state.
Alarm Operation
Zone Alarms
For a status change into an alarm condition (short circuit) on a given alarm zone input:
The zone alarm LED for that alarm zone input illuminates.
The common alarm relay energizes and the alarm contact active LED illuminates.
The audible device sounds the pulsed alarm signal.
The programmed (or default) alarm event code is transferred to the SIA transmitter. (see dialing
operation)
The silence pushbutton may be used to silence the audible. Zone alarms are not latching, in that no user
intervention is required to enable subsequent status change reports, for example, if the zone restores to
normal.
Serial Port Events (SDACT only)
(For supplementary use only) When a complete FACP serial data message is received and recognized by
the personality software module as a message including a valid point status change:
The serial alarm LED illuminates.
The common alarm relay energizes and the alarm contact active LED illuminates.
The audible device sounds the pulsed alarm signal.
The corresponding event code (See appendix A) is transferred to the SIA transmitter (see dialing
operation) for transmission as an ‘old’ event using a SIA ‘O’ block.
If the corresponding event code represents an AC Power Failure message from the FACP, and if User
Jumper J8 is installed, then the transmission and all local indications are delayed for 2 hours. If a
corresponding AC Power Restore message is received from the FACP before the 2 hours elapses, the
pending AC Power Failure transmission and the Restore transmission are cancelled. If an AC Power
Restore message is received from the FACP after the 2 hour delay, i.e. after the AC Power Failure
message has been transmitted, then the Restore is transmitted without delay. (Refer to Programming
features table on page 33).
Note that the supplementary FACP serial port-derived events are not prioritized. All serial events are
equivalent regardless of event type as concerns the local indication of an alarm condition. Once the event
transmission is acknowledged by the receiving station DACR, the local alarm indications will cease, i.e.
the serial alarm LED will go out, the audible will be silenced, and the common alarm relay will return to
normal (assuming no other monitored conditions require the audible or common alarm relay to remain
active) .
