DQBT Ultra-thin Safety Light Curtain (Optical Synchronization)

Compact, installation-friendly light curtain with an ultra-slim body around ~30 × 15 mm. Resolutions 10 / 20 / 40 mm cover finger, palm and hand/arm protection. Standard sensing range 0.3–3 m; strong light immunity ≥10,000 Lux; typical response time ≤ 15 ms; enclosure rating IP65. Dual-channel NPN/PNP safety outputs (NO/NC). Optical synchronization reduces wiring and speeds commissioning.

View Detailed DQBT SeriesDQBT Video Demo
DQBT ultra-thin safety light curtain main image
DQBT machine safety light curtain, installation example
Ultra-thin housing, optical sync for simpler wiring
DQBT presence sensing safety device (PSSD) illustration
Dual-channel NPN/PNP safety outputs (OSSD1/OSSD2)
DQBT ESPE product view
ESPE compliant; IP65; clear indicators
Product Highlights
  • Optical synchronization between emitter and receiver: fewer cables, fast setup, robust against vibration.
  • Self-diagnosis plus short/over-current protection; clear front LEDs make the safety loop easy to troubleshoot.
  • ≤ 15 ms response supports shorter ISO 13855 safety distances when paired with a certified safety relay/PLC.
  • Strong ambient-light immunity ≥10,000 Lux; filtering suppresses flicker and stray light.
  • Ultra-thin body ~30×15 mm, IP65; optional aviation/M12 connection and standard brackets.
  • Designed to IEC 61496-1/-2; integrate with safety controller for high-level architectures.

Values are normalized from the supplied DQBT manual pages; if differences exist, the delivered datasheet and certificates prevail.

Resolution & Application Guide
Resolution (K)Typical Application
10 mmFinger protection near hazard points, assembly fixtures
20 mmPalm protection, access openings
40 mmHand/arm or presence detection for zone guarding

Protective height H = (n − 1) × K. Overall length L = P + H + J + 24 (12 mm allowance at each end). P/J per resolution; see spec tables.

Technical Parameters (DQBT Series)

CategoryItemTypical Value / OptionNotes
OpticalOperating principleThrough-beam infrared LED, modulatedEmitter/receiver pair; optical synchronization
Resolution (K)10 / 20 / 40 mmFinger / Palm / Hand-arm or presence
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)Longer ranges on request
Electrical / I/OSupplyDC 12/24 V; AC 110–220 V (with controller)Reverse/over-voltage protection
Safety outputsDual-channel NPN / PNP, NO/NC selectableOSSD1 / OSSD2
Channel capability≤ 200 mA (typ.)Transistor output
ProtectionShort / Over-current / Over-loadAuto recovery
IndicatorsPower / Run / BlockedClear front LEDs
ConnectorM12 / Aviation plugOptional
SynchronizationOpticalFewer cables, strong anti-interference
Mechanical / EnvironmentBody section~30 × 15 mm (ultra-thin)Aluminum + reinforced end caps
Overall lengthL = P + H + J + 24P/J depend on resolution
Ingress protectionIP65Dust-tight, water-jet resistant
Operating temp.−10 ~ +40 °CStorage −25 ~ +55 °C
HumidityOperating 35–85 %RHStorage 35–95 %RH
ComplianceStandardsIEC 61496-1/-2Safety distance per ISO 13855
CertificationsCE etc.Refer to delivered certificates
System integrationSafety relay / Safety PLCIndependent dual inputs; do not tie channels together

DQBT Series Detailed Specifications

Tables list typical beam counts (n) for each resolution (K) with protective height H and overall length L. Model format: DQBT-K-NN-H. Example: DQBT-40-04-120 (K=40, n=4, H=120).

K (mm)Beams nProtective Height H (mm)P/J (mm)Overall Length L (mm)Model ExampleRange
108705/10109DQBT-10-08-700.3–3 m
1010905/10129DQBT-10-10-900.3–3 m
10121105/10149DQBT-10-12-1100.3–3 m
10141305/10169DQBT-10-14-1300.3–3 m
10161505/10189DQBT-10-16-1500.3–3 m
10181705/10209DQBT-10-18-1700.3–3 m
10201905/10229DQBT-10-20-1900.3–3 m
10222105/10249DQBT-10-22-2100.3–3 m
10242305/10269DQBT-10-24-2300.3–3 m
10262505/10289DQBT-10-26-2500.3–3 m
10282705/10309DQBT-10-28-2700.3–3 m
10302905/10329DQBT-10-30-2900.3–3 m
10323105/10349DQBT-10-32-3100.3–3 m
10343305/10369DQBT-10-34-3300.3–3 m
10363505/10389DQBT-10-36-3500.3–3 m
10383705/10409DQBT-10-38-3700.3–3 m
10403905/10429DQBT-10-40-3900.3–3 m
10424105/10449DQBT-10-42-4100.3–3 m
10444305/10469DQBT-10-44-4300.3–3 m
10464505/10489DQBT-10-46-4500.3–3 m
10484705/10509DQBT-10-48-4700.3–3 m
10504905/10529DQBT-10-50-4900.3–3 m
10525105/10549DQBT-10-52-5100.3–3 m
10545305/10569DQBT-10-54-5300.3–3 m
10565505/10589DQBT-10-56-5500.3–3 m
10585705/10609DQBT-10-58-5700.3–3 m
10605905/10629DQBT-10-60-5900.3–3 m
10626105/10649DQBT-10-62-6100.3–3 m
10646305/10669DQBT-10-64-6300.3–3 m
10666505/10689DQBT-10-66-6500.3–3 m
10686705/10709DQBT-10-68-6700.3–3 m
10706905/10729DQBT-10-70-6900.3–3 m
10727105/10749DQBT-10-72-7100.3–3 m
10747305/10769DQBT-10-74-7300.3–3 m
10767505/10789DQBT-10-76-7500.3–3 m
10787705/10809DQBT-10-78-7700.3–3 m
10807905/10829DQBT-10-80-7900.3–3 m
10828105/10849DQBT-10-82-8100.3–3 m
10848305/10869DQBT-10-84-8300.3–3 m
10868505/10889DQBT-10-86-8500.3–3 m
10888705/10909DQBT-10-88-8700.3–3 m
10908905/10929DQBT-10-90-8900.3–3 m
10929105/10949DQBT-10-92-9100.3–3 m
10949305/10969DQBT-10-94-9300.3–3 m
10969505/10989DQBT-10-96-9500.3–3 m
10989705/101009DQBT-10-98-9700.3–3 m
101009905/101029DQBT-10-100-9900.3–3 m

Overall length uses L = P + H + J + 24. Keep the model format DQBT-K-NN-H.

Typical Applications

  • Presses / shears / press brakes: 10–20 mm resolutions suit hand protection; fast response enables shorter safety distance.
  • Assembly fixtures & robot periphery: finger/palm detection with interlocked safety loop; easy maintenance.
  • Packaging / logistics: 40 mm for aisle and presence detection.
  • General machinery: integrate with a safety relay/PLC for stop, interlock and EDM monitoring.

Safety distance reference (ISO 13855): S = K × T + C, where T is machine stopping time.

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