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DQM High-Accuracy Measurement Safety Light Curtain

High-speed detection light curtain for product presence checks and counting. 36ร—36 mm robust body; resolutions 2.5/5/10/20/40/80 mm; typical detection distance 0.3โ€“3 m (for 2.5 mm up to 0.3โ€“2 m); response time 0.5 ms across all specifications. NPN or PNP transistor outputs, strong anti-interference against welding light/flicker, and convenient installation with aviation/M12 connectors.

Application clarification: the historical page name and URL are retained. DQM is primarily for product detection and counting, with no RS485 or RS232 communication. Its response speed is not a safety certification or an EDM function. Compare the detection and measurement light curtain range by the signal your machine needs; for personnel safeguarding, select a documented safety light curtain system after risk assessment.

View Detailed DQM Series
Object detection arrangement โ€” not evidence of a personnel-safety rating
High-speed detection and counting applications
36ร—36 mm body, standard brackets & cables
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Product Highlights
  • Small-part detection with options down to 2.5 mm beam spacing; select against the actual object size and orientation.
  • 0.5 ms response across all specifications for high-throughput detection and counting; validate total control-system timing separately.
  • Robust anti-interference against ambient light, flicker and welding glare; reliable blocking detection.
  • 36ร—36 mm compact body with aviation/M12 connectors and standard right-angle brackets.
  • NPN or PNP transistor outputs for compatible PLC inputs; select the single- or dual-output wiring variant.
  • No RS485 or RS232 communication. For numeric measurement data, compare the DQL measurement light curtain.

Values summarized from product manual. If any discrepancy exists, the official datasheet and delivered certificates prevail.

Resolution & Application Guide
Resolution (K)Typical Application
2.5 mmSmall-part detection and counting
5 mmFine object presence detection
10 mmGeneral product detection
20 mmPackage presence and counting
40 mmLarger-object presence checks
80 mmLarge-object detection across a wide opening

Detection height H = (n โˆ’ 1) ร— K. Overall length L = P + H + J + 30 (15 mm allowance at each end). P/J depend on resolution; see tables below.

Technical Parameters (DQM Series)

CategoryItemTypical Value / OptionNotes
OpticalOperating principleThrough-beam infrared LED, modulatedEmitter/receiver pair; measurement-grade beam array
Resolution (K)2.5 / 5 / 10 / 20 / 40 / 80 mmMeasurement to wide presence detection
Detection height (H)H = (n โˆ’ 1) ร— Kn = number of beams
Response time0.5 msAll specifications; manufacturer confirmed. PLC/system delay is additional.
Ambient light immunityHigh immunityAnti-flicker & anti-welding-glare design
Detection distance0.3โ€“3 m (2.5 mm: 0.3โ€“2 m)Longer distances available on request
Electrical / I/OSupplyDC 12/24 VReverse/over-voltage protection
Switching outputsNPN or PNP transistorSingle/dual output and NO/NC selection depend on the ordered wiring variant
Channel capabilityโ‰ค 200 mA (typ.)Check the ordered variant and PLC input load
Serial communicationNo RS485 or RS232Switching detection/counting, not serial measurement data
ProtectionShort / Over-current / Over-loadAuto recovery
IndicatorsPower / Run / BlockedFront indicators; optional numeric display
ConnectorM12 / Aviation plugStandard cables & brackets
SynchronizationOpticalReduced wiring, stable commissioning
Mechanical / EnvironmentBody section~36 ร— 36 mmAluminum housing
Overall lengthL = P + H + J + 30P/J by resolution
Ingress protectionIP65Dust-tight, water-jet resistant
Operating temp.โˆ’10 ~ +40 ยฐCStorage โˆ’25 ~ +55 ยฐC
HumidityOperating 35โ€“85 %RHStorage 35โ€“95 %RH
Application / DocumentationIntended taskProduct detection and counting0.5 ms does not establish a Type, PL or SIL rating
CertificatesCheck exact-model documentsDo not infer personnel-safety suitability from a general certificate or output label
System integrationCompatible PLC counting/digital inputCheck input common, pulse capture, supply and ordered wiring; no EDM capability is claimed here

DQM Series Detailed Specifications

Tables list typical beam counts (n) for each resolution (K) with detection height H and overall length L. Model format: DQM-K-NN-H.

K (mm)Beams nDetection Height H (mm)P/J (mm)Overall Length L (mm)Model ExampleDetection Distance
2.53277.51.25/25.75134.5DQM-2.5-32-77.50.3โ€“2 m
2.54097.51.25/25.75154.5DQM-2.5-40-97.50.3โ€“2 m
2.548117.51.25/25.75174.5DQM-2.5-48-117.50.3โ€“2 m
2.556137.51.25/25.75194.5DQM-2.5-56-137.50.3โ€“2 m
2.564157.51.25/25.75214.5DQM-2.5-64-157.50.3โ€“2 m
2.572177.51.25/25.75234.5DQM-2.5-72-177.50.3โ€“2 m
2.580197.51.25/25.75254.5DQM-2.5-80-197.50.3โ€“2 m
2.588217.51.25/25.75274.5DQM-2.5-88-217.50.3โ€“2 m
2.596237.51.25/25.75294.5DQM-2.5-96-237.50.3โ€“2 m
2.5104257.51.25/25.75314.5DQM-2.5-104-257.50.3โ€“2 m
2.5112277.51.25/25.75334.5DQM-2.5-112-277.50.3โ€“2 m
2.5120297.51.25/25.75354.5DQM-2.5-120-297.50.3โ€“2 m
2.5128317.51.25/25.75374.5DQM-2.5-128-317.50.3โ€“2 m
2.5136337.51.25/25.75394.5DQM-2.5-136-337.50.3โ€“2 m
2.5144357.51.25/25.75414.5DQM-2.5-144-357.50.3โ€“2 m
2.5152377.51.25/25.75434.5DQM-2.5-152-377.50.3โ€“2 m
2.5160397.51.25/25.75454.5DQM-2.5-160-397.50.3โ€“2 m
2.5168417.51.25/25.75474.5DQM-2.5-168-417.50.3โ€“2 m
2.5176437.51.25/25.75494.5DQM-2.5-176-437.50.3โ€“2 m
2.5184457.51.25/25.75514.5DQM-2.5-184-457.50.3โ€“2 m
2.5192477.51.25/25.75534.5DQM-2.5-192-477.50.3โ€“2 m
2.5200497.51.25/25.75554.5DQM-2.5-200-497.50.3โ€“2 m
2.5208517.51.25/25.75574.5DQM-2.5-208-517.50.3โ€“2 m
2.5216537.51.25/25.75594.5DQM-2.5-216-537.50.3โ€“2 m
2.5224557.51.25/25.75614.5DQM-2.5-224-557.50.3โ€“2 m
2.5232577.51.25/25.75634.5DQM-2.5-232-577.50.3โ€“2 m
2.5240597.51.25/25.75654.5DQM-2.5-240-597.50.3โ€“2 m
2.5248617.51.25/25.75674.5DQM-2.5-248-617.50.3โ€“2 m
2.5256637.51.25/25.75694.5DQM-2.5-256-637.50.3โ€“2 m
2.5264657.51.25/25.75714.5DQM-2.5-264-657.50.3โ€“2 m
2.5272677.51.25/25.75734.5DQM-2.5-272-677.50.3โ€“2 m
2.5280697.51.25/25.75754.5DQM-2.5-280-697.50.3โ€“2 m
2.5288717.51.25/25.75774.5DQM-2.5-288-717.50.3โ€“2 m
2.5296737.51.25/25.75794.5DQM-2.5-296-737.50.3โ€“2 m
2.5304757.51.25/25.75814.5DQM-2.5-304-757.50.3โ€“2 m
2.5312777.51.25/25.75834.5DQM-2.5-312-777.50.3โ€“2 m
2.5320797.51.25/25.75854.5DQM-2.5-320-797.50.3โ€“2 m

Model example format: DQM-K-NN-H. For special ranges or bespoke heights, contact DAIDISIKE.

Typical Applications

  • High-speed detection & counting: product passage counting, spraying/dispensing presence checks and process triggering.
  • Assembly and electronics lines: small-part detection with 2.5โ€“5 mm resolutions; fast reject via 0.5 ms response.
  • Packaging & logistics: select spacing and detection height for the package or item window.
  • General automation: integrate the ordered transistor output with a compatible PLC input for non-safety process control.

For reliable counting, test the smallest product, shortest gap, PLC input filter and counter timing at operating speed. See NPN/PNP sensor-to-PLC wiring principles; use the DQM variant drawing for actual wire assignments.

Frequently Asked Questions

What resolution should I choose on the DQM for measurement versus presence detection?

Match beam spacing, detection height and the target orientation to the smallest product you must detect. The DQM offers 2.5/5/10/20/40/80 mm options. Finer spacing suits small-part detection; wider spacing suits larger objects. Validate the smallest target across the detection field. Beam spacing is not a dimensional-accuracy specification, and a transistor presence signal does not provide a numerical height or width value.

How fast is the DQM response time and why does it matter for high-speed lines?

All DQM specifications achieve a 0.5 ms sensor response time, as confirmed by the manufacturer. This supports fast product detection and counting. The complete counting or reject system also includes PLC input filtering, scan or counter timing, output switching and actuator delay; validate the shortest object pulse and gap at the actual line speed. Sensor response alone does not establish a personnel-safety function.

How do I calculate the safety distance for the DQM measurement light curtain?

Do not select DQM for personnel safeguarding by substituting 0.5 ms into a safety-distance formula. DQM is primarily offered for product detection and counting; this page does not establish a certified safety function. A guarding application needs a risk assessment, the exact model safety documentation, a suitable safety controller and validated machine stopping performance. Choose a documented safety light curtain system for that task.

Can the DQM be used as a measurement grating, not just a safety curtain?

DQM is primarily a high-speed object-detection and counting light curtain with NPN or PNP switching outputs. It does not have RS485 or RS232 communication and should not be described as delivering numerical dimensions or beam-position data over those interfaces. The detection height follows H = (n โˆ’ 1) ร— K. For serial or analog measuring data, compare the DQL measurement light curtain and its ordered interface.

How do I wire the DQM NPN or PNP outputs to a PLC for counting?

Match the ordered NPN or PNP variant to the PLC input circuit and use its wiring drawing. The factory drawings show a five-wire NPN single-output version and a seven-wire PNP dual-output version; not every DQM has two outputs. Check supply, input common, allowable load and PLC pulse capture. Labels such as OSSD on a catalogue drawing are not, by themselves, evidence of a certified safety output or EDM capability.

What detection range and ingress protection does the DQM offer?

The DQM has a typical detection distance of 0.3โ€“3 m (0.3โ€“2 m at 2.5 mm resolution), with longer ranges available on request. It is rated IP65 (dust-tight, water-jet resistant) with high ambient-light immunity and anti-welding-glare design, making it suitable for most indoor measurement, assembly and packaging environments.

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Application support: Engineer Cai, Senior Application Engineer. NPN/PNP output options, no serial communication and 0.5 ms across all specifications were confirmed by the manufacturer on September 6, 2026. For documentation, review certificates against the exact ordered model; a general certificate is not proof of a personnel-safety rating.

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