Cable Length; Alarm And Disqualification Relay - Interlogix SB Series Installation Manual

Cable diameter and length
Table 4: Length of 12V DC power cable (m) (screened SYT1-type)
Ø of wire Cross-section
(mm) area wire (mm²)
0,6 0,3
0,9 0,6
1,4 1,5
Table 5: Length of 12V AC/DC heating cable (m) (screened SYT1-type)
Ø of wire Cross-section
(mm) area wire (mm²)
0,6 0,3
0,9 0,6
1,4 1,5
Note: If a single cable is used to supply power to several elements, the distance given should be
divided by the number of elements connected to the cable. If several wires of the same cross-
sectional area and polarity are placed in parallel, the distances given should be multiplied by the
number of wires.

Alarm and disqualification relay

When infrared signal is significantly reduced (for example, fog, heavy rain, etc.)
then the disqualification relay will be triggered after 60 s and the Alarm LED will
blink.
In case of obstruction of the beams (for example, by an object or a person) for
more than 60 s, first alarm relay will be triggered, then disqualification relay will
be triggered and alarm relay will be reset (see Figure 6 on page 9 for details).
8
SB250-N SB2100-N
159 159
359 359
800 800
SB250-N SB2100-N
94 94
211 211
470 470
SB450-N SB4100-N
136 136
307 307
684 684
SB450-N SB4100-N
47 47
105 105
235 235
SB Series AIR Beam Detectors Installation Manual
SB4200-N
136
307
684
SB4200-N
47
105
235