bolid Signal-10, User Manual

Page: 20 / 98

Orion ISS
www.bolid.com
20
loop is considered to be in Armed status. The alarm loop can switch from the Fire Prealarm status to
the Fire Alarm status if a second detector included into this alarm loop has actuated, as well as the giv-
en Alarm Delay has expired. (If Alarm Delay is set with zero value, Fire Prealarm status will switch to
Fire Alarm status immediately.) The Alarm Delay value of 255 s (the maximum possible value) corre-
sponds to unlimited timeout, such as switching from the Fire Prealarm status to the Fire Alarm status is
implemented only after actuating of another detector included into the alarm loop.
The integration time for an alarm loop of the Type 1 is defined in accordance with the requirements
mentioned in the Alarm Integration Time section of this Manual on the page 28.
Table 2 shows the matching between current resistance values and corresponding statuses of alarm
loops of the Type 1.
The wiring diagram for including fire smoke (normally open) detectors into alarm loops of the Type 1 is
presented on the page 64.
Combined Fire Single Threshold Alarm Loop (Type 2)
A loop of the Type 2 (Combined Fire Single Threshold) is intended to involve fire smoke (normally
open) and heat (normally closed) detectors. This loop is considered to be in one of the following status-
es:
Armed The alarm loop is monitored, its resistance being normal
Disarmed The alarm loop is not monitored
Arming Delay The programmed Arming Delay has not been expired
Fire Prealarm Either activation of a heat detector or repeated activation of a smoke
detector is recognized within the loop
Fire Alarm The Alarm Delay has expired after single detector actuation
Short Circuit Failure
The resistance of the loop is less than 100
Ω
Open Circuit Failure
The resistance of the loop is more than 16 K
Ω
Arming Failed An attempt to arm the loop has failed because the loop is broken
A heat detector having actuated, the loop switches to the Fire Prealarm status.
When a smoke detector has actuated, the Signal-10 generates a FIRE SIGNAL message and repeat-
edly queries condition of the loop (see above, for a loop 1). If detector actuation is confirmed, the loop
switches to the Fire Prealarm status.
The loop can switch from the Fire Prealarm status to the Fire Alarm status after expiring of the given
Alarm Delay. If the value of the given Alarm Delay equals to zero, then the loop will switch from the Fire
Prealarm status to the Fire Alarm status immediately. The Alarm Delay value of 255 s (maximum possi-