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16
1 channel
2 channel
A: Line protection
Rx
Rx
Tx
Ch. 1
Ch. 1 Ch. 1
B: 2-stacked protection
Tx
Ch. 1
Tx
Ch. 3
C: Line and 2-stacked protection
1 Ch.
1 Ch. 1 Ch.
Tx
Rx
Rx
Tx
Rx
Rx
3 Ch.
3 Ch. 3 Ch.
EN: Installation Sheet
Product description
The PB501/ PB511/ PB521 photoelectric beam sensors have
an infrared transmitter (Tx) and receiver (Rx). They are
designed to be "AND gated". An alarm is initiated only when
two stacked beams are simultaneously interrupted. If one
beam is interrupted (eg, by an insect or a leaf) it does not
initiate an alarm. Four beam frequency channels are available
to prevent cross talk when using multiple units.
Part description
Figure 1:
The product is supplied with the following items.
Please check that they are all included.
1
Terminals
2
Beam channel
4 / 24
3 channel
4 channel
Tx
Rx
Tx
Ch. 1 Ch. 3
Ch. 3
Rx
Ch. 1
Rx
Ch. 3
1 Ch. 2 Ch.
2 Ch.
Tx
Rx
Tx
Tx
Tx
Rx
3 Ch. 4 Ch.
4 Ch.
17
73 mm
12 mm
20 mm
12 mm
Ø 16 mm
25 mm
12 mm
3
Lens
4
View finder
5
Operation LED
6
Horizontal adjustment
7
Vertical adjustment screw
8
Cover
9
Mounting plate
10
Alarm LED
11
Attenuation LED
12
Response time adjustment
13
Monitor jack
14
Tapping screw
15
Pole-mounting plate
16
Pole bracket
17
Attenuation sheet
1
71.5 mm
2
1
P/N 1077838 • REV 2.0 • ISS 14JUN12
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