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Signal-10 Operation Principles

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When the alarm loop is armed, either any skip of the resistance value (by more than 10%), or actuation

of the detector (opening of its alarm contact), or tamper switch actuation causes the loop to be consid-

ered as being in the Intrusion Alarm status. When the alarm loop is disarmed, either tamper switch ac-

tuation or loop short circuit failure causes the alarm loop to be considered as being in the Tamper Alarm

status.

An alarm integration time for this type of alarm loops can be 70 ms or 300 ms depending on the pro-

grammed value of the 300-ms Integration Time parameter.

Table 2 shows the matching between current resistance values and corresponding statuses of alarm

loops of the Type 5.

The wiring diagram for including an intrusion detectors and its tamper switch into an alarm loop of the

Type 5 is presented on the page 66.

NOTE: Please take into account the following using an alarm loop of the Type 5.

If such alarm loop is disarmed when the detector brought in the loop has been responded,

in addition to receiving the Disarmed message you can receive some additional messages:

Tamper Alarm and Tamper Restored, the last message being received after 15 s since re-

storing the detector. These additional messages are due to specific operation of the device

of this version and don’t show actual conditions of the detector’s tamper switch.

So, you are not recommended to use the Type 5 in cases when alarm loops are to be sup-

posed to be disarmed after a detector’s response (after entering into the protected

area).

If such alarm loop is disarmed when the detector is in quiescent mode, no additional mes-

sages are received.

Auxiliary Alarm Loop (Type 6)

Auxiliary alarm loops (loops of the Type 6) are intended to monitor operability and conditions of fire-

fighting equipment as well as sensors and indicators not related directly with fire or intrusion alarms.

Devices with dry contact (both normally closed and open) or open collector outputs can be included into

such alarm loop.

This loop is considered to be in one of the following statuses:

Auxiliary Zone Restored

Auxiliary Zone Alarm

If the resistance of the alarm loop of the Type 6 has been out of the normal range for more than

300 ms, then the alarm loop is considered to be in the Auxiliary Zone Alarm status. When the loop is

restored (that is, its resistance has been within normal range for more than Arming Delay seconds), the

loop is considered to be in the Auxiliary Restored Status.

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