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DQC Safety Light Curtain (ESPE)

The general-purpose safety light curtain in the DAIDISIKE range. Resolutions 10/14/20/25/30/40/80/200 mm and protective heights 50–3800 mm (H = (n − 1) × K); standard detection distance 0.3–3 m (0.3–6 m as a custom build); response time ≤ 15 ms; enclosure rating IP65; supply DC 12/24 V (AC 110–220 V with a controller). Transistor outputs with NPN/PNP and NO/NC selection (order suffix A/B/C/D), 4/5/6-core wiring.

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Dimensions & installation details
Appearance & wiring examples
Application in machinery
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Product Highlights
  • High resolution: Minimum beam spacing of 10mm, supporting fine detection (Resolution), suitable for finger protection (Finger Protection).
  • High protection rating: IP65, dust-tight and water-jet resistant, suitable for normal industrial environments.
  • Fast response: response time ≤ 15 ms, which shortens the ISO 13855 safety distance you can mount the operator at.
  • Solid-state output: transistor outputs with PNP/NPN and NO/NC selection (order suffix A = NPN NC, B = PNP NC, C = NPN NO, D = PNP NO); no mechanical wear, long lifespan. Wiring by 4-core, 5-core or 6-core cable.
  • Widest resolution span in the range: eight beam pitches from 10 mm finger protection to 200 mm area presence, in protective heights from 50 mm to 3800 mm.
  • Multi-beam configuration: 4–32 beams; above 32 beams the DQCE series is the catalogue's designated alternative.
  • Full accessory set: DQCA-01 (option), DQCA-02 (standard), DQCA-03 (option), DQCA-04 (standard), DQCA-05 (standard) mounting brackets.

Data normalized from the provided manual pages; if differences exist, the official datasheet/warranty documents prevail.

Resolution & Application Guide
Resolution (K)Typical Application
10 mm / 14 mmFinger protection (assembly, fixtures, close-to-hazard stations)
20 mm / 25 mm / 30 mmPalm protection (packaging, access openings)
40 mm / 80 mm / 200 mmHand/arm or body presence (aisles, zone guarding)

Protective height H = (n − 1) × K. Overall length L = H + addon (varies by K; see spec tables below).

Technical Parameters (DQC Series)

CategoryItemTypical Value / OptionNotes
OpticalOperating principleThrough-beam infrared LED, modulatedEmitter/receiver pair; filtering and anti-interference design
Resolution (K)10 / 14 / 20 / 25 / 30 / 40 / 80 / 200 mmFinger / Palm / Hand-arm or Body
Protective height (H)H = (n−1) × Kn = number of beams
Response time≤ 15 msVaries with beam count
Detection accuracyFollows beam pitch (finest 10 mm)See model list
Detection distance0.3–3 m (standard); 0.3–6 m (custom)Specify on order
Electrical / I/OSupplyDC 12/24 V; AC 110–220 V (with controller)Per catalogue
OutputsTransistor, NPN/PNP signal selectionSuffix A = NPN NC, B = PNP NC, C = NPN NO, D = PNP NO
Wiring4-core / 5-core / 6-corePer build
IndicatorsPower / Run / BlockedStatus indication
Mechanical / EnvironmentBody sectionContact factoryHousing dimensions and material not published for this series
Overall lengthL = H + addon (varies by K)Approx. values; see tables
Ingress protectionIP65Dust-tight, water-jet resistant
Operating temp.Contact factoryNot published for the DQC series
ComplianceStandardsThrough-beam AOPD designed with reference to IEC 61496; safety distance per ISO 13855No type class (Type 2/4) or performance level is published for this series — confirm with the factory
System integrationSafety relay / Safety PLCUse only an exact documented compatible safety interface; catalogue OUT/CP is not a dual safety OSSD pair

DQC Series Detailed Specifications

Tables list typical beam counts (n) for each resolution (K) with protective height H and overall length L. Model format: DQCnn/K-H. Example: DQC06/10-50 (K=10, n=6, H=50). Output: Add A/B/C/D (NPN NC / PNP NC / NPN NO / PNP NO).

K (mm)Beams nProtective Height H (mm)Overall Length L (mm)Model ExampleRange
10650111DQC06/10-500.3–3 m
10870131DQC08/10-700.3–3 m
101090151DQC10/10-900.3–3 m
1012110171DQC12/10-1100.3–3 m
1014130191DQC14/10-1300.3–3 m
1016150211DQC16/10-1500.3–3 m
1018170231DQC18/10-1700.3–3 m
1020190251DQC20/10-1900.3–3 m
1022210271DQC22/10-2100.3–3 m
1024230291DQC24/10-2300.3–3 m
1026250311DQC26/10-2500.3–3 m
1028270331DQC28/10-2700.3–3 m
1030290351DQC30/10-2900.3–3 m
1032310371DQC32/10-3100.3–3 m

For 0.3–6 m builds, specify on order. Keep the model format DQCnn/K-H. Add A/B/C/D for output type (PNP NO / PNP NC / NPN NO / NPN NC).

Typical Applications

  • Presses / shears / press brakes: 10–30 mm resolutions suit finger and hand protection; the ≤15 ms response enables a shorter safety distance.
  • Assembly fixtures & robot periphery: finger/palm detection with interlocked safety loop; easy maintenance.
  • Packaging / logistics: 40–200 mm for aisle and presence detection.
  • General machinery: confirm exact-model safety evidence and compatible evaluation before a protective-stop application. Reset and EDM must be documented for the chosen controller.

Positioning requires the applicable ISO 13855 case and complete stopping performance: sensor, safety-control and final-switching response plus machine stopping, without double-counting measured components.

Installation Method

Determine the installation method: Side installation method (This item is sent by default), Two-end installation method, Tubular installation method.

Finger protection Spacing 10mm, Palm protection Spacing 20mm, Arm or body protection Spacing 40mm.

The DQC series safety light curtains can be used with the DQCA-01 (option), DQCA-02 (standard), DQCA-03 (option), DQCA-04 (standard) and DQCA-05 (standard) mounting accessories.

Mutual shooting distance: It is suggested that you inform us of the actual range to achieve a better detection effect.

Protection height: The distance between the highest light spot and the lowest light spot is the range of the area that can be sensed on the grating.

Working Principle

The working principle of the DQC series safety light curtain is based on through-beam photoelectric sensing technology, using infrared beams to create a virtual protective barrier. The specific process is as follows:

  1. Beam Emission and Reception: The emitter emits modulated infrared beams, and the receiver detects light intensity.
  2. Synchronization Mechanism: the standard catalogue example uses wired CP synchronisation. Match the pair and revision, and align it as the manual specifies.
  3. Detection of Interruption: Object interrupts beam, triggering alarm.
  4. Signal Processing: the documented output changes after beam interruption. Catalogue transistor OUT is not proof of a dual safety OSSD interface or a complete protective stop.
  5. Recovery: clearing the beams does not itself approve a restart. Reset and restart interlocking depend on the actual controller, documented functions and validated machine design.
  6. Anti-Interference: Filters to filter interference.

Frequently Asked Questions

What resolution should I choose for finger, hand or body protection?

Pick by the smallest body part that can reach the hazard: 10–14 mm for finger protection, 20–30 mm for hand/palm protection, and 40 mm or larger for arm or body/area guarding. The DQC offers 10/14/20/25/30/40/80/200 mm, so one series covers presses, robot cells and perimeter zones.

What safety type / performance level does the DQC carry?

The DQC 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 DQC series, so none is claimed here. Request the current test documentation from the factory before specifying the DQC into a rated safety function; where a documented Type 4 / PL e / SIL 3 device is required, use the DQT4 series, which is catalogued with that rating.

Can the DQC replace an Omron F3SG-SR, SICK or Keyence safety light curtain?

Do not assume a drop-in safety replacement. Matching housing, beam pitch, range or transistor polarity does not establish equivalent detection capability, safety rating or output diagnostics. Compare the complete ordering code, protective field, response, mounting, documented safety interface and certificate scope. Revalidate positioning and the complete machine safety function; the standard DQC catalogue OUT/CP interface is not proof of compatibility with a dual OSSD safety input. See the comparison guides for the evidence checklist.

How do I wire the DQC outputs to a PLC or safety relay?

The DQC uses transistor outputs ordered by suffix: A = NPN NC, B = PNP NC, C = NPN NO, D = PNP NO. Cable versions vary. The standard catalogue example identifies white as transistor OUT and black as CP synchronisation; these are not OSSD1 and OSSD2. Do not copy a dual-channel safety circuit onto that interface. Personnel-protection use requires the exact model's documented safety capability and compatible evaluation. Reset and feedback depend on the selected controller: current DA31 material documents reset selection but does not state EDM; DQSRN provides neither. Separate ordinary PLC diagnostics from protective-stop evaluation.

How do I calculate the minimum safety distance for the DQC?

Determine positioning from the applicable ISO 13855 access case, detection capability and complete stopping performance. Use the exact configured curtain response, relevant safety-control and final-switching delays, and measured machine stopping time without double-counting a component already included in a verified measurement. Include applicable intrusion and reach allowances; a single generic formula or sensor value is not a complete installation assessment.

What detection distance and response time does the DQC have?

The DQC has a standard detection distance of 0.3–3 m, extendable to 0.3–6 m as a custom build, and a response time of ≤15 ms. The housing is rated IP65 (dust-tight, water-jet resistant). Supply is DC 12/24 V, or AC 110–220 V with a controller.

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Technical specs reviewed by Engineer Cai, Senior Application Engineer. See certificates.

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