A no-blind-zone safety light curtain for industrial automation. Compact 30×28 mm body with resolutions 10/20/30 mm and protective heights 90–2130 mm; standard detection distance 0.3–3 m (optional 0.3–6 m); response time ≤ 15 ms; ingress protection IP65. Transistor outputs with NPN/PNP and NO/NC selection (order suffix A/B/C/D), two 7-core cables. The first and last beams sit at the very ends of the housing, so there is no dead zone at the end caps.
No blind zone window: end-beam design eliminates dead zones near caps, improving safety near the hazard.
Fast: response ≤15 ms, which shortens the ISO 13855 safety distance.
Solid-state output: transistor, NPN/PNP and NO/NC selectable by order suffix A/B/C/D; two 7-core cables.
Protective heights 90–2130 mm across 10 / 20 / 30 mm beam pitch, up to 72 beams.
Compact 30 × 28 mm body, protection IP65.
Flexible install: DQCA-01/02/03/05 accessories, with DQCA-05 supplied as standard for side fixing.
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; 90–2130 mm
n = number of beams; no dead zone at the end caps
Response time
≤ 15 ms
Varies with beam count
Detection accuracy
Follows beam pitch (finest 10 mm)
See model list
Detection distance
0.3–3 m (standard); 0.3–6 m (optional)
Specify on order
Electrical / I/O
Outputs
Transistor, NPN/PNP signal selection
Suffix A = PNP NO, B = PNP NC, C = NPN NO, D = NPN NC
Wiring
Two 7-core cables
Emitter and receiver
Supply voltage
Contact factory
Not published for the DQO series
Indicators
Power / Run / Blocked
Branch LEDs show beam status
Mechanical / Environment
Body section
30 × 28 mm
Housing material: contact factory
Overall length
L ≈ H + 13.5 mm
P+J ends ~6.75 mm each
Ingress protection
IP65
Dust-tight, water-jet resistant
Operating temp.
Contact factory
Not published for the DQO series
Compliance
Standards
Through-beam AOPD designed with reference to IEC 61496; safety distance per ISO 13855
No type class (Type 2/4) or performance level is published for this series — confirm with the factory
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.
Beam sequencing: emitter and receiver stay in step so each beam is evaluated in turn.
What safety type / performance level does the DQO carry?
The DQO is a through-beam opto-electronic protective device (AOPD) — a product category designed with reference to IEC 61496 and to the machinery-safety standards ISO 13849 / ISO 13855. DAIDISIKE has not published a type classification (Type 2 / Type 4) or a performance level for the DQO series, so none is claimed here; request the current test documentation from the factory before specifying the DQO into a rated safety function. Where a documented Type 4 / PL e / SIL 3 device is required, use the DQT4 series. The final PL or SIL of the complete safety function is validated by the integrator in any case, 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 outputs in NPN or PNP?
The DQO uses transistor outputs ordered by model suffix: A = PNP NO, B = PNP NC, C = NPN NO, D = NPN NC. Wiring is by two 7-core cables. 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, mechanically. The DQO offers 10/20/30 mm resolutions, a 0.3–3 m detection distance (0.3–6 m optional), ≤15 ms response, IP65 and NPN/PNP transistor outputs, so it can serve as a quality equivalent. Match the resolution, protective height and output type to the unit being replaced and re-verify the ISO 13855 safety distance. Where the original carried a certified Type/PL rating, confirm the equivalent documentation with the factory.
What is the detection distance and what does blind-spot-free mean?
Standard detection distance is 0.3–3 m, with a 0.3–6 m version specified on order. Blind-spot-free refers to the first and last beam sitting at the very ends of the housing, so there is no dead zone at the end caps — the full protective height H = (n − 1) × K is usable right up to the mounting surface. Ingress protection is IP65, dust-tight and resistant to water jets. Body section is 30 × 28 mm.
