Channel Selection - GE SB250 Installation Manual

∅ of wire
(mm)
0.6
0.9
1.4
1.8
2.3
T = Transmitter
Note: If a single cable is used to supply power to several elements, the distances 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
Signal
Min
4 sec
* This will free up the alarm relay when there are several alarm relays connected in series
(for example, different units on one pillar). If this option is not required, connect the alarm
and disqualification relays in series.
Connecting the tampering detection contact
Remove the PCB at the bottom of the module, connect the two wires and then replace the
PCB, sliding it in the two grooves until it can go no further, and taking care not to twist the
contact strip.
4.

Channel selection

To avoid different detectors at the same site interfering with each other, they are equipped
with a choice of 4 frequencies (channels).
Each receiving and transmitting pair must be set to use the same channel. This is done
using DIP switches 3 and 4 at the top of the terminal block. The channel is validated by
LENGTH OF 12 VAC/VDC HEATING CABLES (m)
(screened SYT1-type cable)
Cross-sectional
area of wire
2
(mm )
0.3
0.6
1.5
2.5
4
R = Receiver
Max 60 sec
SB250 and SB2100
T R T+R
75 75
170 170
400 400 200
600 600 300
1000 1000 500
T+R = Complete detector (transmitter+receiver)
Beam interuption
Alarm relay
Beam interuption
Alarm relay (NC)
Disqualification relay (NO) *
6
SB450, SB4100 and
SB4200
T R
30 40 40
80 85 85
190 190
300 300
500 500
T+R
20
40
95
160
250