14
Table 4
Loop Type
Loop State Depending on the Loop Resistance
OK
Activated
Open Failure
Short Failure
Fire
2
÷
14 k
17 k
÷
50 k
500
Ω÷
1,6 k
>50 k
<200
Ω
Intrusion,
Panic, Entrance
2
÷
14 k
<1.6 k
>17 k
------------
----------------
For the purpose of protection against sabotage, after the intrusion alarm loops are
armed they are monitored for changes their resistance with time. If the alarm loop re-
sistance jumps more than 10% then the alarm loop is considered to be activated.
RELAY CONTROL
The UO-4S supports eight tactics of controlling its relays (see Table 5). For all the tactics apart
from Remote Control and Communication Failure operation of a relay depends on the selected
control tactics and states of the alarm loops associated with this relay. For all the tactics except for
Lamp, Communication Failure, and Switch Off upon Arming* a time in the range of 1 to 254 seconds
must be defined for which the relay will be switched on or the relay will be operated permanently until
the state of the related inputs (alarm loops) changes; the Lamp tactics regardless of the given time is
always applied until input’s state changes. For all the tactics of control excluding Remote Control it is
necessary to tick the alarm loops associated with this relay.
Table 5. Relay Control Tactics
Tactics «Lamp»*
All the alarm loops are disarmed
Off
There is an alarm loop armed
On
Fire Alarm
On/Off with a period of 0.25 s
Intrusion Alarm
Entrance Alarm
Arming Failed
On/Off with a period of 0.5 s
Loop open circuit failure
Loop short circuit failure
On/Off (0.25 s on, 1.75 s off)
Tactics «Confirmation»
All the alarm loops are disarmed
Off
Waiting for a confirmation
On/Off with a period of 2 s
A confirmation is received
On
Fire Alarm
On/Off with a period of 0.25 s
Intrusion Alarm
Entrance Alarm
Arming Failed
On/Off with a period of 0.5 s
Loop open/short circuit failure
On/Off (0.25 s on, 1.75 s off)
Tactics «Siren»
The loop(s) in Fire Alarm
On/Off (1.5 s on, 0.5 s off)
The loop(s) in Alarm
On
Other states
Off
Tactics «Lock Control»
A short circuit of the disarmed alarm loop
On,
after opening the alarm loop the relay is turned off in 4s
Disarming of the alarm loop(s)
The relay is turned on for 4 s