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SIGNAL-20P DESIGN AND OPERATING PRINCIPLES

The type 2 alarm loop resolving time is determined in accordance

with the requirements of the section 4.1.2.

The compatibility of loop resistance and the corresponding status can

be shown at the Table 3.

The diagram of connection the fire smoke (normally opened) and

heat (normally closed) detectors to the type 2 alarm loop is contained into

the Appendix E.

The type 3 is the fire heat loop with double actuation recogni-

tion.

The fire heat (normally closed) detectors are included into the alarm

loop. The alarm loop statuses can be:

“Armed” – the alarm loop is monitored and the resistance is in normal

range.

“Disarmed” - the alarm loop is not monitored.

“Arm delay” – the arming delay has not yet been elapsed.

“Fire prealarm” – the one detector actuation has been fixed.

“Fire alarm” - actuating more than one detector has been fixed, or the

Intrusion/Fire delay has expired after single detector actuation.

“Loop trbl short” – the alarm loop resistance is less than 2 KOhm.

“Loop trbl open” - the alarm loop resistance is more than 25 KOhm.

“Arm Failed” – the alarm loop was broken when arming.

When the detector in such alarm loop has actuated the device enters

the “Fire Prealarm” mode. The device enters the “Fire Alarm” mode from

“Fire Prealarm” if the second detector has been activated at this loop or “In-

trusion/Fire Delay” has been expired. If “Intrusion/Fire Delay” was given as

0 then the transition from “Fire prealarm” to “Fire alarm” mode would hap-

pen instantly. If “Intrusion/Fire Delay” was given as maximum value 255

then the transition from “Fire prealarm” to “Fire alarm” would be able only if

the second detector in this loop has actuated.

The type 3 alarm loop resolving time is determined in accordance

with the requirements of the section 4.1.2.

The compatibility of loop resistance and the corresponding status can

be shown at the Table 3.

The diagram of connection the heat (normally closed) detectors to the

type 3 alarm loop is contained into the Appendix E.

The type 4 is the burglary alarm loop.

The alarm loop includes burglary detectors of all types, including nor-

mally closed, normally opened, powerless, supplied via alarm loop or sepa-

rately

The alarm loop statuses can be:

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