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14
ALARM LOOPS
The Signal-10 device provides monitoring for up to ten alarm loops connected to its input contacts.
While operating with threshold detectors (opposite to operating with addressable threshold initiating
devices which will be described later), the device measures and analyses the effective resistance val-
ues of each the connected alarm loop. Depending on:
The measured resistance value, and
Whether the loop is armed or disarmed, and
The algorithm the loop is programmed to be monitored (so called Loop Type)
the Signal-10 assigns this loop to a certain status such as ‘Norm’, ‘Failure’, ‘Alarm’ and so on.
Having analyzed the loop status, the Signal-10 device:
−
Indicates the loop status by the related built-in two-color status LED on the device cover
−
Emits a specified sound signal by means of the built-in sounder (not for all statuses)
−
Activates executive outputs (if programmed)
−
While operating as a part of an Orion security system, automatically transmits loop status al-
tering to the Orion network controller
Any fire and intrusion detectors intended to be powered by DC supply can be brought into alarm loops
of the Signal-10, the detector internal resistance in Fire mode having to be:
−
No more than 2.7 k
Ω
for normally open detectors and
−
No more than 3.2 k
Ω
for normally closed detectors
Alarm Loop Configuration Parameters
Table 1 shows a set of parameters which can be programmed for the Signal-10 device to define a
monitoring algorithm for each the alarm loop of the Signal-10.
The main configuration parameter of each the Signal-10 alarm loop is the Loop Type. This parameter
defines which way the alarm loop will be monitored for and which detectors can be included into this
loop. The Signal-10 supports 10 various types of alarm loops which will be described in details in the
next section.
The Arming Delay (Exit Delay) parameter defines the time (in seconds), starting from the moment of
the receiving the arming command, after elapsing of which the Signal-10 will really attempt to arm the
alarm loop. Non-zero Arming Delay values are typically used for Entrance Alarm Loops (of the Type 7).
Moreover, if one of the Signal-10 outputs is required to be activated before arming an alarm loop, for
example, to unset power of 4-wire detectors by means of the ‘Switch On for a Time Before Arming’ ex-
ecutive program, this alarm loop must obligatory have non-zero Arming Delay (see Relay Outputs sec-
tion of this Manual).