A no-blind-zone safety light curtain for industrial automation. Compact 30×28 mm body with resolutions 10/20/30 mm; standard sensing range 0.3–3 m (optional 0.3–6 m); strong ambient light immunity ≥ 10,000 Lux (incidence ≥ 5°); response time ≤ 15 ms; ingress protection IP65. Dual-channel NPN/PNP OSSD (NO/NC) with EDM; blind-spot-free window for safer detection.
Flexible install: M12 aviation plug; side / end / tubular mounting accessories available.
Specs summarized from the DQO manual; if differences exist, the datasheet and delivered certificates prevail.
Resolution & Application Guide
Resolution (K)
Typical Application
10 mm
Finger protection (assembly, fixtures, near point-of-operation)
20 mm
Palm/hand protection (packaging, access openings)
30 mm
Arm/body presence (perimeter, aisles)
Protective height H = (n − 1) × K. Overall length L ≈ H + 13.5 mm (end allowance P+J≈6.75+6.75).
Technical Parameters (DQO Series)
Category
Item
Typical Value / Option
Notes
Optical
Operating principle
Through-beam infrared LED, modulated
Emitter/receiver pair; dead-zone-free window
Resolution (K)
10 / 20 / 30 mm
Finger / Hand / Arm-body
Protective height (H)
H = (n−1) × K
n = number of beams
Response time
≤ 15 ms
Varies with beam count
Ambient light immunity
≥ 10,000 Lux
Incidence ≥ 5°
Sensing range
0.3–3 m (standard); 0.3–6 m (optional)
Specify on order
Electrical / I/O
Supply
DC 12/24 V; AC 110–220 V (with controller)
Reverse/over-voltage protection
Safety outputs
Dual-channel NPN / PNP (OSSD), NO/NC selectable
Sink ≤500 mA, short-circuit protection
Channel capability
≤ 200 mA (typ.)
Transistor output
Protection
Short / Over-current / Over-load / Reverse polarity
Auto recovery
Indicators
Power / Run / Blocked
Branch LEDs show beam status
Connector
M12 circular aviation connector
Custom cable lengths
Synchronization
Optical
Fewer cables; robust immunity
Mechanical / Environment
Body section
30 × 28 mm
Aluminum alloy; ABS end-caps
Overall length
L ≈ H + 13.5 mm
P+J ends ~6.75 mm each
Ingress protection
IP65
Dust-tight, water-jet resistant
Operating temp.
−10 ~ +40 °C
Storage −25 ~ +55 °C
Humidity
Operating 35–85 %RH
Storage 35–95 %RH
Compliance
Standards
Designed to IEC 61496-1/-2 / EN 61496-3 Type 4 architecture; suitable for EN ISO 13849-1 PL d / Cat.4 safety chains
Final PL/SIL of the complete safety function validated by integrator per ISO 13855
Conformity
CE-marked for EU market; tested to relevant standards (specific third-party certificates available on request)
Refer to delivered documents
System integration
Safety relay / Safety PLC
Independent dual inputs; EDM support
DQO Series Detailed Specifications
Model format: DQOnn/K-H. Example: DQO12/10-110 (K=10, n=12, H=110). Output suffix A/B/C/D = PNP NO / PNP NC / NPN NO / NPN NC.
K (mm)
Beams n
Protective Height H (mm)
Overall Length L (mm)
Model Example
Range
10
12
110
123.5
DQO12/10-110
0.3–3 m
10
14
130
143.5
DQO14/10-130
0.3–3 m
10
16
150
163.5
DQO16/10-150
0.3–3 m
10
18
170
183.5
DQO18/10-170
0.3–3 m
10
20
190
203.5
DQO20/10-190
0.3–3 m
10
22
210
223.5
DQO22/10-210
0.3–3 m
10
24
230
243.5
DQO24/10-230
0.3–3 m
10
26
250
263.5
DQO26/10-250
0.3–3 m
10
28
270
283.5
DQO28/10-270
0.3–3 m
10
30
290
303.5
DQO30/10-290
0.3–3 m
10
32
310
323.5
DQO32/10-310
0.3–3 m
10
34
330
343.5
DQO34/10-330
0.3–3 m
10
36
350
363.5
DQO36/10-350
0.3–3 m
10
38
370
383.5
DQO38/10-370
0.3–3 m
10
40
390
403.5
DQO40/10-390
0.3–3 m
10
42
410
423.5
DQO42/10-410
0.3–3 m
10
44
430
443.5
DQO44/10-430
0.3–3 m
10
46
450
463.5
DQO46/10-450
0.3–3 m
10
48
470
483.5
DQO48/10-470
0.3–3 m
10
50
490
503.5
DQO50/10-490
0.3–3 m
10
52
510
523.5
DQO52/10-510
0.3–3 m
10
54
530
543.5
DQO54/10-530
0.3–3 m
10
56
550
563.5
DQO56/10-550
0.3–3 m
10
58
570
583.5
DQO58/10-570
0.3–3 m
10
60
590
603.5
DQO60/10-590
0.3–3 m
10
62
610
623.5
DQO62/10-610
0.3–3 m
10
64
630
643.5
DQO64/10-630
0.3–3 m
10
66
650
663.5
DQO66/10-650
0.3–3 m
10
68
670
683.5
DQO68/10-670
0.3–3 m
10
70
690
703.5
DQO70/10-690
0.3–3 m
For 0.3–6 m builds, specify on order. Keep the model format DQOnn/K-H. Add A/B/C/D for output type (PNP NO / PNP NC / NPN NO / NPN NC).
Typical Applications
Presses / press brakes / shears: 10–20 mm for finger/hand protection; shorter safety distance with fast stop.
Assembly fixtures & robotics periphery: high resolution with interlocked safety loop and EDM.
Packaging / logistics: 30 mm for aisle and perimeter guarding.
Safety distance reference (ISO 13855): S = K × T + C, where T is machine stopping time.
Installation Method
Mounting options: side-mount (default), end-mount, tubular mount. Use M12 aviation plugs; align emitter/receiver and verify blind-spot-free window alignment with the hazard.
Resolution map: 10 mm (finger), 20 mm (hand), 30 mm (arm/body). Protective height equals the sensing window from the top beam to the bottom beam.
Working Principle
DQO forms a synchronized array of infrared beams between the emitter and receiver. When any beam is interrupted, the internal safety logic switches OSSD outputs to OFF, and the connected safety relay/PLC removes motive power. The blind-spot-free window ensures coverage up to the end caps.
Emission & reception: modulated IR LED; receiver filters spurious light.
Optical synchronization: maintains sequence without extra sync wire.
The DQO is designed to the IEC 61496-1/-2 Type 4 architecture and suits EN ISO 13849-1 PL d / Cat. 4 safety chains for presses and brakes. It is CE-marked for the EU market. The final PL or SIL of the complete safety function must be validated by the integrator, including stopping time and ISO 13855 safety distance.
Which resolution should I choose for finger protection?
Use the 10 mm resolution for finger protection at the point of operation, 20 mm for palm or hand detection on packaging and access openings, and 30 mm for arm and body presence on perimeters and aisles. Protective height H = (n − 1) × K, where n is the beam count and K is the resolution.
How do I wire the OSSD outputs with EDM in NPN or PNP?
The DQO provides dual-channel OSSD outputs, selectable NPN or PNP and NO/NC, with short-circuit, over-current, overload and reverse-polarity protection. Connect both channels to independent inputs on a safety relay or safety PLC, and use the EDM (external device monitoring) feedback loop to confirm the contactors drop out before each restart.
Can the DQO replace an Omron, SICK deTec or Keyence light curtain?
In many cases yes. The DQO offers 10/20/30 mm resolutions, 0.3–3 m range (optional 0.3–6 m), ≤15 ms response, IP65 and dual-channel NPN/PNP OSSD with EDM, so it can serve as a quality equivalent. Match the resolution, protective height and output type to the unit being replaced and verify the ISO 13855 safety distance.
What is the sensing range and ambient light immunity?
Standard sensing range is 0.3–3 m, with an optional 0.3–6 m version specified on order. Ambient light immunity is ≥10,000 Lux at an incidence angle of ≥5°, and the receiver filters EMI, welding arc and strobe interference. Ingress protection is IP65, making it dust-tight and resistant to water jets.
