DQO Blind-Spot-Free Safety Light Curtain (ESPE)

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.

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DQO dimensions and installation
Dimensions & installation
DQO wiring examples
Wiring examples (NPN/PNP)
DQO application scenarios
Application scenarios
Product Highlights
  • No blind zone window: end-beam design eliminates dead zones near caps, improving safety near the hazard.
  • Fast & reliable: response ≤15 ms with continuous self-monitoring; supports EDM and restart interlock.
  • Solid-state OSSD: dual-channel NPN/PNP, NO/NC selectable; short/over-current/overload/reverse-polarity protection.
  • Strong immunity: filters EMI, welding arc and strobe; ambient light immunity ≥10,000 Lux (≥5° incidence).
  • Durable mechanics: aluminum alloy body, ABS reinforced end-caps; protection IP65.
  • 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 mmFinger protection (assembly, fixtures, near point-of-operation)
20 mmPalm/hand protection (packaging, access openings)
30 mmArm/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)

CategoryItemTypical Value / OptionNotes
OpticalOperating principleThrough-beam infrared LED, modulatedEmitter/receiver pair; dead-zone-free window
Resolution (K)10 / 20 / 30 mmFinger / Hand / Arm-body
Protective height (H)H = (n−1) × Kn = number of beams
Response time≤ 15 msVaries with beam count
Ambient light immunity≥ 10,000 LuxIncidence ≥ 5°
Sensing range0.3–3 m (standard); 0.3–6 m (optional)Specify on order
Electrical / I/OSupplyDC 12/24 V; AC 110–220 V (with controller)Reverse/over-voltage protection
Safety outputsDual-channel NPN / PNP (OSSD), NO/NC selectableSink ≤500 mA, short-circuit protection
Channel capability≤ 200 mA (typ.)Transistor output
ProtectionShort / Over-current / Over-load / Reverse polarityAuto recovery
IndicatorsPower / Run / BlockedBranch LEDs show beam status
ConnectorM12 circular aviation connectorCustom cable lengths
SynchronizationOpticalFewer cables; robust immunity
Mechanical / EnvironmentBody section30 × 28 mmAluminum alloy; ABS end-caps
Overall lengthL ≈ H + 13.5 mmP+J ends ~6.75 mm each
Ingress protectionIP65Dust-tight, water-jet resistant
Operating temp.−10 ~ +40 °CStorage −25 ~ +55 °C
HumidityOperating 35–85 %RHStorage 35–95 %RH
ComplianceStandardsIEC 61496-1/-2, EN 61496-3 (Type 4), EN ISO 13849-1 (PL d Cat.4)Safety distance per ISO 13855
CertificationsCE, UL, TÜVRefer to delivered certificates
System integrationSafety relay / Safety PLCIndependent 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 nProtective Height H (mm)Overall Length L (mm)Model ExampleRange
1012110123.5DQO12/10-1100.3–3 m
1014130143.5DQO14/10-1300.3–3 m
1016150163.5DQO16/10-1500.3–3 m
1018170183.5DQO18/10-1700.3–3 m
1020190203.5DQO20/10-1900.3–3 m
1022210223.5DQO22/10-2100.3–3 m
1024230243.5DQO24/10-2300.3–3 m
1026250263.5DQO26/10-2500.3–3 m
1028270283.5DQO28/10-2700.3–3 m
1030290303.5DQO30/10-2900.3–3 m
1032310323.5DQO32/10-3100.3–3 m
1034330343.5DQO34/10-3300.3–3 m
1036350363.5DQO36/10-3500.3–3 m
1038370383.5DQO38/10-3700.3–3 m
1040390403.5DQO40/10-3900.3–3 m
1042410423.5DQO42/10-4100.3–3 m
1044430443.5DQO44/10-4300.3–3 m
1046450463.5DQO46/10-4500.3–3 m
1048470483.5DQO48/10-4700.3–3 m
1050490503.5DQO50/10-4900.3–3 m
1052510523.5DQO52/10-5100.3–3 m
1054530543.5DQO54/10-5300.3–3 m
1056550563.5DQO56/10-5500.3–3 m
1058570583.5DQO58/10-5700.3–3 m
1060590603.5DQO60/10-5900.3–3 m
1062610623.5DQO62/10-6100.3–3 m
1064630643.5DQO64/10-6300.3–3 m
1066650663.5DQO66/10-6500.3–3 m
1068670683.5DQO68/10-6700.3–3 m
1070690703.5DQO70/10-6900.3–3 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.

  1. Emission & reception: modulated IR LED; receiver filters spurious light.
  2. Optical synchronization: maintains sequence without extra sync wire.
  3. Self-test & EDM: continuous diagnostics; monitors external devices.
  4. Recovery: restart interlock per risk assessment.
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