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BOS 21M-_ _ _-_ _ _ _-S4
Photoelectric Sensors
Diffuse, retro-reflective and through-beam sensors
Installation
The sensor can be attached in three different ways:
–
Using two M4 screws and washers with the housing
through-holes
–
Using a mounting bracket (accessory)
–
Using special clamps (available separately) on the
dovetail of the housing
15.4
11.8
6.3
1) Optical axis receiver
(for BOS 21M-...-RD..., BOS 21M-...-PR..., BOS 21M-...-RE...)
Optical axis emitter (for BOS 21M-...-RS...)
2) Optical axis emitter (for BOS 21M-...-RD..., BOS 21M-...-PR...)
Fig. 2: Dimensions
The switching distance is measured beginning at the
optical window.
The M12 connector can be rotated 240°.
Each sensor must be individually aligned.
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LED ye
*
*
LED gn
42.7
29.9
19.4
8
Connections
Fig. 3: Pin configuration
Signal
Pin
BOS 21M-PAI-...-S4
1
Operating voltage (+)
2
Switching output (Q2)
3
GND (–)
Switching output (Q1),
4
IO-Link communication
(C)
Tab. 1: Pin assignment
BOS 21M-PAI-RD30-S4 and BOS 21M-PAI-PR30-S4
1
2
4
3
BOS 21M-PAI-RE30-S4
1
2
4
3
BOS 21M-XI-RS31-S4
1
2
4
3
Fig. 4: Connection diagrams
BOS 21M-XI-RS31-S4
Input function test
(emitter off)
IO-Link communication
(C)
+
Q2
Q1 / C
–
+
Q2
Q1 / C
–
+
Test
C
–
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