In through-beam photoelectric sensing, also known as opposed mode, the transmitter and emitter are in separate housings. Light emitted from the transmitter is aimed directly at the receiver. When an object breaks the beam of light between the emitter and receiver, the receiver’s output changes state.
Through-beam sensing is the most efficient sensing mode which results in the longest sensing ranges and highest excess gain. This high gain enables through-beam sensors to be reliably used in foggy, dusty and dirty environments.
| General specifications |
| Effective detection range |
0 … 30 m |
| Threshold detection range |
43 m |
| Light source |
LED |
| Light type |
modulated visible red light , 630 nm |
| Alignment aid |
LED yellow:
1. LED illuminates: Sufficient light signal received, emitter and receiver alignment is correct
2. LED flashes: Reaching switching point
3. LED off: Light beam is interrupted or the alignment is out |
| Diameter of the light spot |
approx. 800 mm at a distance of 30 m |
| Opening angle |
Emitter: 0.5 ° , Receiver: 1.5 ° |
| Ambient light limit |
50000 Lux |
| Accessories provided |
2 x Mounting bracket OMH-RL31-01 and mounting materials |
| Functional safety related parameters |
| MTTFd |
790 a |
| Mission Time (TM) |
20 a |
| Diagnostic Coverage (DC) |
0 % |
| Indicators/operating means |
| Operation indicator |
LED green: power on |
| Function indicator |
LED yellow:
1. LED lit constantly: signal > 2 x switching point (function reserve)
2. LED flashes: signal between 1 x switching point and 2 x switching point
3. LED off: signal < switching point |
| Electrical specifications |
| Operating voltage |
24 … 240 V AC
12 … 240 V DC |
| No-load supply current |
Emitter: ≤ 40 mA
Receiver: ≤ 3 mA |
| Power consumption |
Emitter: ≤ 1 VA
Receiver: ≤ 1 VA |
| Output |
| Switching type |
light-on |
| Signal output |
Relay, 1 alternator |
| Switching voltage |
max. 250 V AC/DC |
| Switching current |
max. 3 A |
| Switching power |
DC: max. 150 W AC: max. 750 VA |
| Switching frequency |
≤ 20 Hz |
| Response time |
≤ 25 ms |
| Conformity |
| Product standard |
EN 60947-5-2 |
| Compliance with standards and directives |
| Standard conformity |
|
| Standards |
EN 62103 |
| Approvals and certificates |
| Protection class |
II , rated voltage ≤ 250 V AC with pollution degree 1-2 according to IEC 60664-1 Output circuit basis insulation of input circuit according to EN 50178, rated insulation voltage 240 V AC |
| CCC approval |
Certified by China Compulsory Certification (CCC) |
| Ambient conditions |
| Ambient temperature |
-25 … 55 °C (-13 … 131 °F) |
| Storage temperature |
-40 … 70 °C (-40 … 158 °F) |
| Mechanical specifications |
| Degree of protection |
IP67 |
| Connection |
Emitter: 2 m fixed cable , 2-wire
Receiver: 2 m fixed cable , 5-wire |
| Material |
|
| Housing |
Polycarbonate |
| Optical face |
PMMA |
| Mass |
Emitter: 116 g
Receiver: 131 g |
Associated Products: LA31/LK31/25/31/115
| Kit component |
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| Mounting bracket
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