DQA Long-distance Safety Light Curtain

Name: DQA Long-distance Safety Light Curtain
Brand: DAIDISIKE
SKU: dqa-long-distance-safety-light-curtain
Availability: InStock

Long-range through-beam safety light curtain for large presses, hydraulic and shearing machines: a transmitter/receiver pair spanning up to 40 m, in 8 beam pitches from 10 to 200 mm, with NPN, PNP or relay output and a selectable single- or dual-output signal. Designed to the Type 4 architecture of IEC 61496 and Category 4 of ISO 13849-1.

▶ Watch it in action: Pre-Wired Safety Light Curtain Kit with Aviation Connectors — Unbox to Hook-Up

DQA Long-distance Safety Light Curtain - product photo

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Technical Specifications

Curtain Type	Through-beam (opposed mode) — separate transmitter and receiver
Safety Design Basis	Type 4 architecture (IEC 61496-1/-3); Category 4 (ISO 13849-1). Catalog cites EN 61496-3:2019 Type 4, EN 13849-1:2015. Certification documents available on request.
EMC Certification	Holds TÜV SÜD Attestation of Conformity No. E8A 104143 0001 (Rev. 00) for electromagnetic compatibility under EU Directive 2014/30/EU, tested to EN 61000-6-2:2005 and EN 61000-6-4:2007/A1:2011. Certificate held by Foshan DAIDISIKE; covers the DQA, DQR, DQRF, DQC, DQZ, DQE and DQT series. (This is an EMC certificate; it does not certify the machine-safety / ESPE function.)
Beam Pitch	10 / 14 / 20 / 25 / 30 / 40 / 80 / 200 mm
Detection Accuracy (min. detectable object)	18 / 22 / 28 / 33 / 38 / 48 / 88 / 208 mm (= beam pitch + 8 mm)
Number of Beams	6, 8 … 32 (10/14/25 mm pitch); 4, 6 … 32 (20/30/40/80 mm); 4, 6 … 18 (200 mm)
Protected Height	Beam pitch x (number of beams - 1)
Sensing Distance	Selectable by model code: 0.3-3 / 0.3-6 / 0.3-10 / 0.3-15 / 0.3-20 / 0.3-25 / 0.3-30 / 0.3-40 m (codes A-H). Base configurations 30-3000 mm and 30-6000 mm.
Response Time	<= 15 ms
Ambient Light Immunity	10,000 lux (incidence angle >= 5 degrees)
Dimensions	51 x 35 mm x L (L = transmitter / receiver length)
Enclosure Rating	IP65
Controller	DQCA / DQCA2
Supply Voltage	DC 12/24 V; AC 110-220 V (relay-output version)
Current Consumption	<= 200 mA
Output	NPN / PNP type, sink current 500 mA, residual voltage < 1.5 V, with polarity, short-circuit and overload protection
Output State	ON when beams clear (receiver indicator green)
Indicators	Transmitter: power (red). Receiver: output — clear (green) / blocked (red)
Light Source	Modulated infrared LED
Connection	Circular aviation connector with dedicated cable; transmitter 4-core, receiver 5-core
Housing Material	Aluminium alloy; end caps ABS-reinforced nylon
Ambient Light Tolerance	Incandescent: 3,000 lux at receiver face; sunlight: 10,000 lux at receiver face
Operating Temperature	-10 to +40 degrees C (non-condensing); storage -25 to +55 degrees C
Ambient Humidity	Operating 35-85% RH; storage 35-95% RH

Overview

The DQA is DAIDISIKE's long-range through-beam (opposed-mode) safety light curtain: a separate transmitter and receiver bar that project a plane of modulated infrared beams across a machine opening. Breaking any beam switches the output and stops the machine. It is designed to the Type 4 architecture of IEC 61496-1 and -3 and to Category 4 of ISO 13849-1 (the catalog also cites EN 61496-3:2019 Type 4 and EN 13849-1:2015). It is built for presses, hydraulic and oil presses, shearing machines, automatic doors and other large machinery, and for danger zones that need protection over a long span.

What sets the DQA apart from a standard-range curtain is reach: the sensing distance is selectable by model code from 0.3-3 m up to 0.3-40 m, so one transmitter/receiver pair can guard a wide opening that a short-range curtain cannot span. It is configured from 4 to 32 beam axes across eight pitch steps (10, 14, 20, 25, 30, 40, 80 and 200 mm); above 32 axes the DQT series (up to 72 axes) takes over.

Output is flexible: NPN or PNP, normally open or normally closed, or a relay (volt-free) output, wired via the transmitter's 4-core and the receiver's 5-core aviation connector, with a single- or dual-output-signal option. The 51 x 35 mm aluminium housing is rated IP65, self-checks continuously, and rejects ambient light to 10,000 lux at an incidence angle of 5 degrees or more.

Key Facts — DQA at a glance

The DQA is designed to the Type 4 architecture of IEC 61496-1/-3 and to Category 4 of ISO 13849-1, as stated in the DAIDISIKE light-curtain catalog. Certification documents are available on request.
The DQA is covered by TÜV SÜD Attestation of Conformity No. E8A 104143 0001 for electromagnetic compatibility (EU EMC Directive 2014/30/EU), tested to EN 61000-6-2:2005 and EN 61000-6-4:2007/A1:2011.
The DQA sensing distance is selectable by model code across eight steps — 0.3-3 m, 0.3-6 m, 0.3-10 m, 0.3-15 m, 0.3-20 m, 0.3-25 m, 0.3-30 m and 0.3-40 m (codes A to H).
The DQA offers eight beam pitches — 10, 14, 20, 25, 30, 40, 80 and 200 mm — with a corresponding detection accuracy (minimum detectable object) of 18, 22, 28, 33, 38, 48, 88 and 208 mm respectively (pitch + 8 mm).
The DQA response time is 15 ms or less, and it rejects ambient light up to 10,000 lux at an incidence angle of 5 degrees or greater.
The DQA protected height equals beam pitch multiplied by (number of beams - 1); model numbers run from 4 to 32 beam axes, and installations needing more than 32 axes use the DQT series (up to 72 axes).
The DQA output is NPN or PNP (normally open or normally closed) or a relay output, selected by model code (A = NPN NC, B = PNP NC, C = NPN NO, D = PNP NO, J = relay), with sink current 500 mA, residual voltage under 1.5 V, and polarity, short-circuit and overload protection.
The DQA runs on DC 12/24 V, or AC 110-220 V on the relay-output version, drawing 200 mA or less, in a 51 x 35 mm aluminium housing rated IP65 over an operating range of -10 to +40 degrees C (non-condensing).

Features & Benefits

Purpose-Built Long-Range Series

The DQA is the catalog-designated long-distance variant of Daidisike's safety light curtain line, intended for spans beyond the standard-range DQC series (0.3-3 m standard, customizable to 6 m).

Full 10-200 mm Pitch Range at Long Range

The complete 8-step pitch lineup (10/14/20/25/30/40/80/200 mm) available in the standard DQC series is also offered in DQA, so fine-resolution protection down to 10 mm does not have to be sacrificed for a longer detection range.

Scalable 4-32 Beam-Axis Configuration

Beam-axis count scales from 4 to 32 across every pitch option, e.g., DQA06/10-50 through DQA32/10-310 at 10 mm pitch, letting the protected height be matched to the actual opening or machine side.

Systematic Model Naming

Model numbers follow DQA + beam-axis count + "/" + pitch + "-" + protected height, so the part number itself encodes the physical protected height and resolution, simplifying selection and re-ordering.

Dedicated End-Mounting Brackets for Long Spans

In addition to the common DQCA-01/02/03/05 brackets, DQA-specific end-mounting accessories (DQA-01/DQA-02) are available for two-end installation, aimed at stable mounting and easier beam alignment over a long transmitter-receiver span.

Transistor Output with Single/Dual Signal Selection

The catalog documents transistor output (labeled PNP in the wiring diagram) with a choice of single or dual output signal, wired via 5-core or 7-core cable.

Applications

Perimeter Guarding for Robot Work Cells — Long-range through-beam capability suits guarding the outer boundary of a robot cell where the transmitter-receiver span is longer than a compact machine footprint requires.

Entry Detection on Gantry/Truss Machining Centers — The pitch and beam-axis range let the curtain be configured to the side height and required detection resolution of large gantry equipment.

Access Guarding at Warehouse Dock and Aisle Openings — Wider pitch options (80/200 mm) support larger opening protection where the goal is presence/entry detection rather than fine body-part resolution.

Wide-Opening Area Guarding with Large-Pitch Configuration — The 80 mm and 200 mm pitch steps, combined with up to 32 beam axes, are suited to guarding wide access openings.

Automated Production Line Boundary Protection — The DQA structure, shared with DQC, is a general-purpose safety light curtain platform, applicable wherever a machine or line boundary needs continuous through-beam monitoring.

Long-Span Installations Beyond Standard-Range DQC — Per the catalog's series positioning, DQA is the option to reach for once the required transmitter-receiver distance exceeds the standard DQC range.

Models & Ordering Information

16 standard models across 8 beam-pitch options. Select the pitch your risk assessment calls for, then the protective height that covers the opening.

Beam-axis count from 6 to 32; protected height (mm) = beam-axis count x 10 - 10.

DQA Long-distance Safety Light Curtain — 10 mm beam pitch, 2 standard models
Model	Beam pitch K (mm)	Number of beams N	Protective height H (mm)
DQA06/10-50	10	6	50
DQA32/10-310	10	32	310

DQA Long-distance Safety Light Curtain — 14 mm beam pitch, 2 standard models
Model	Beam pitch K (mm)	Number of beams N	Protective height H (mm)
DQA06/14-70	14	6	70
DQA32/14-434	14	32	434

DQA Long-distance Safety Light Curtain — 20 mm beam pitch, 2 standard models
Model	Beam pitch K (mm)	Number of beams N	Protective height H (mm)
DQA04/20-60	20	4	60
DQA32/20-620	20	32	620

DQA Long-distance Safety Light Curtain — 25 mm beam pitch, 2 standard models
Model	Beam pitch K (mm)	Number of beams N	Protective height H (mm)
DQA06/25-125	25	6	125
DQA32/25-775	25	32	775

DQA Long-distance Safety Light Curtain — 30 mm beam pitch, 2 standard models
Model	Beam pitch K (mm)	Number of beams N	Protective height H (mm)
DQA04/30-90	30	4	90
DQA32/30-930	30	32	930

DQA Long-distance Safety Light Curtain — 40 mm beam pitch, 2 standard models
Model	Beam pitch K (mm)	Number of beams N	Protective height H (mm)
DQA04/40-120	40	4	120
DQA32/40-1240	40	32	1240

DQA Long-distance Safety Light Curtain — 80 mm beam pitch, 2 standard models
Model	Beam pitch K (mm)	Number of beams N	Protective height H (mm)
DQA04/80-240	80	4	240
DQA32/80-2480	80	32	2480

DQA Long-distance Safety Light Curtain — 200 mm beam pitch, 2 standard models
Model	Beam pitch K (mm)	Number of beams N	Protective height H (mm)
DQA04/200-600	200	4	600
DQA18/200-3400	200	18	3400

2 standard models at 10 mm pitch · 16 across the series. Protective height is derived as H = (N − 1) × K. Intermediate beam counts can usually be built to order — send the opening height you need to cover.

How to read the DQA model code

DQA [beams] / [pitch] - [protected height] [output groups] [signal] [sensing distance]

DQA = series. [beams] = 04, 06, 08, 10 … 32. [pitch] = 10/14/20/25/30/40/80/200 mm. [protected height] in mm = pitch x (beams - 1). [output groups] = blank for one group, 2 for two groups. [signal] = A (NPN NC), B (PNP NC), C (NPN NO), D (PNP NO), J (relay). [sensing distance] = A (0.3-3 m), B (0.3-6 m), C (0.3-10 m), D (0.3-15 m), E (0.3-20 m), F (0.3-25 m), G (0.3-30 m), H (0.3-40 m). Example: DQA08/40-280 1 D A = 8 beams, 40 mm pitch, 280 mm protected height, single output, PNP NO, 0.3-3 m sensing distance.

Application by resolution (per the catalog)

Finger: 10 / 14 mm pitchHand: 20 / 25 mm pitchArm or body: 30 / 40 / 80 mm pitch

The catalog groups pitches by protection task. Note the detection accuracy (minimum detectable object) at the finest 10 mm pitch is 18 mm; if your risk assessment demands 14 mm finger detection capability, confirm the exact figure with us before specifying.

How to Select

Model number structure is DQA + beam-axis count (2 digits) + "/" + pitch (mm) + "-" + protected height (mm); protected height = beam-axis count x pitch - pitch.
Choose the pitch by the smallest object or body part that must be reliably detected: finer pitch (10/14 mm) for higher-resolution protection, coarser pitch (80/200 mm) for area, body, or vehicle-presence detection over wide openings.
For a given pitch, pick the beam-axis count (4-32, per the catalog's listed steps) whose protected height matches the physical opening or machine side to be guarded.
Select DQA when the required transmitter-to-receiver span exceeds the standard DQC range (0.3-3 m standard, customizable to 6 m); use DQC when the span fits within that standard range.
The catalog documents transistor (PNP) output with a choice of single or dual output signal, using 5-core or 7-core wiring; confirm other output options with the factory before ordering.
For standard mounting use the common DQCA-01/02/03/05 brackets; for two-end mounting on long spans, use the dedicated DQA-01/DQA-02 brackets.
DQA is available up to 32 beam axes per pitch; if more beam axes are required, select the DQT series (up to 72 axes) instead.

📘 Need the full method? How to Choose a Safety Light Curtain · Type 2 vs Type 4 Safety Light Curtains

When NOT to specify the DQA — and what to use instead

You need true 14 mm finger detection capability

Why not: The finest DQA pitch is 10 mm, but its detection accuracy — the minimum object it reliably detects — is 18 mm (pitch + 8 mm). That is a hand-level rather than a strict 14 mm finger-detection figure, even though the catalog labels the 10/14 mm pitches as finger protection.

Use instead: Confirm the required detection capability against your ISO 13855 risk assessment; ask us for a finer-resolution series if 14 mm finger detection is mandatory.

Short-range guarding on a compact machine, 0.3-3 m span

Why not: The DQA is the long-range variant, with sensing distance selectable up to 0.3-40 m. On a small machine you pay for reach you do not use, and the long-range optics are not the most economical choice for a short span.

Use instead: The standard-range DQC series for typical 0.3-3 m machine guarding, or a compact ultra-thin series (DQB / DQZ) where mounting space is tight.

Washdown, high-pressure hosing or wet environments

Why not: The DQA housing is rated IP65 — dust-tight and protected against low-pressure water jets, but not against high-pressure jetting or immersion.

Use instead: The DQR waterproof safety light curtain series for wet or washdown areas.

Ambient temperature outside -10 to +40 degrees C, or condensing conditions

Why not: The DQA operating range is -10 to +40 degrees C, non-condensing. Outside that band, or where the optical faces can condense or ice, detection is not guaranteed.

Use instead: A heated or sheltered enclosure that holds the curtain within spec, or confirm a wide-temperature option with us.

More than 32 beam axes are needed for the protected height

Why not: DQA model numbers stop at 32 beam axes. A taller field at a given pitch needs more axes than the DQA provides.

Use instead: The DQT series, which extends the same platform to 72 beam axes.

The machine control needs a relay (volt-free) output but an NPN/PNP variant was ordered, or vice versa

Why not: Output type is fixed by the model code letter (A/B/C/D = NPN/PNP solid-state, J = relay) and cannot be changed in the field. A solid-state PNP output will not drive a circuit expecting a volt-free relay contact.

Use instead: Order the J (relay-output) variant for volt-free contacts, or the matching A/B/C/D code for the sinking/sourcing and NO/NC logic your controller expects.

Specifications we do not publish yet

We only publish a figure once we are confident it is true. The items below are still being validated through further testing and real-world customer feedback, so for now we would rather leave them open than guess. If one of them matters to your design, ask us for the latest validated status.

PFHd, MTTFd and DCavg figures needed to integrate the DQA into a full ISO 13849-1 machine calculation. The catalog states Category 4 but does not publish these numbers.
Safety-distance calculation guidance (ISO 13855) and the exact response time per beam count — the catalog gives only the <= 15 ms maximum.
The front cover of the catalog advertises sensing distance up to 50 m, but the model-code table stops at code H = 0.3-40 m. The maximum orderable sensing distance needs confirming.
Machine-safety (ESPE) certification: the TÜV SÜD certificate on file (E8A 104143 0001) covers EMC (Directive 2014/30/EU) only. An IEC 61496 EU-Type Examination certificate from a notified body — the document that would substantiate a Type 4 / Category 4 safety-function claim — and any UL listing are not yet on hand. Certification documents available on request.
The difference between the DQCA and DQCA2 controllers, and which models require an external controller versus operating stand-alone.
Muting and fixed/floating blanking function availability and configuration.
Cable length options and the aviation-connector pinout.
Available cable exit / connector variants and maximum cable run.

Frequently Asked Questions

What is the DQA safety light curtain used for?

The DQA is a through-beam (transmitter/receiver pair) safety light curtain used for perimeter and access guarding on machines and openings where the detection span is longer than what the standard-range DQC series is intended for, such as large gantry machining centers, robot cell perimeters, and wide warehouse or dock openings.

What pitch (resolution) options does the DQA series offer?

DQA is available in eight pitch steps: 10, 14, 20, 25, 30, 40, 80, and 200 mm, matching the full pitch range of the standard DQC series.

How many beam axes can a DQA safety light curtain have?

DQA is configured from 4 to 32 beam axes depending on pitch and required protected height. For applications needing more than 32 beam axes, the DQT series (up to 72 axes) is the designated alternative.

How do I read a DQA model number?

The model number follows DQA + beam-axis count + "/" + pitch (mm) + "-" + protected height (mm). For example, DQA32/10-310 means 32 beam axes, 10 mm pitch, and a 310 mm protected height (protected height = beam-axis count x pitch - pitch).

What output signal type does the DQA use?

The catalog documents transistor output, labeled PNP in the wiring diagram, with a choice of single or dual output signal, wired via 5-core or 7-core cable.

What is the difference between DQA and the standard DQC safety light curtain?

DQA and DQC share the same pitch range (10-200 mm) and 4-32 beam-axis structure. DQA is the catalog's long-range variant, positioned for spans beyond the standard DQC range (0.3-3 m standard, customizable to 6 m); DQC is the more economical choice when the required span is within its standard range.

What is the difference between DQA and DQT?

DQA is capped at 32 beam axes. DQT is the catalog's long-range option for applications that also need more than 32 beam axes, up to 72 axes.

What mounting accessories are available for DQA?

DQA can use the common DQCA-01/02/03/05 mounting brackets, plus dedicated two-end mounting brackets DQA-01 and DQA-02 designed for stable installation and easier beam alignment over long spans.

Is the DQA suitable for outdoor or washdown environments?

The DQA housing is rated IP65 -- dust-tight and protected against low-pressure water jets, but not high-pressure jetting or immersion. For outdoor rain, washdown or wet areas, use the DQR / DQRF waterproof series.

What is the maximum operating (detection) distance for DQA?

The DQA sensing distance is selectable by model code from 0.3-3 m up to 0.3-40 m (codes A-H). Note the catalog front cover advertises up to 50 m while the model-code table stops at 0.3-40 m, so the exact maximum orderable distance should be confirmed with us.