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DQZ Ultra-thin (Front-emitting) Safety Light Curtain

Ultra-thin, front-emitting safety light curtain, 17.2 x 30 mm in cross-section, that mounts flush in slots too narrow for standard-body units: 7 beam pitches (10-80 mm), 0.3-3 m sensing distance, NPN/PNP output. Designed to the Type 4 architecture of IEC 61496-1/-2/-3 and Category 4 (PLd) of EN ISO 13849-1:2015.

▶ Watch it in action: 3D Animation: How Light Curtains, Door Locks, Safety Mats & LiDAR Guard a Machine

DQZ Ultra-thin (Front-emitting) Safety Light Curtain - product photo🔍 Click to enlarge · 1/10

Technical Specifications

Curtain TypeThrough-beam (opposed mode) -- separate transmitter and receiver
Safety Design BasisDesigned to the safety level of IEC 61496-1/-2 and to EN 61496-3:2019 Type 4; Category 4 (PLd) per EN 13849-1:2015. Catalog also cites GB/T19436.1, GB4584-2007 and GB/T19001-2016 idt ISO 9001:2015 (quality management system). Certification documents are available on request.
EMC CertificationHolds 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.)
Housing Dimensions17.2 x 30 mm x L (L = transmitter/receiver length) -- ultra-thin, front-emitting: optical window on the 17.2 mm face
Beam Pitch10 / 14 / 20 / 25 / 30 / 40 / 80 mm (80 mm pitch and other special specifications are made to order per the catalog)
Detection Accuracy (min. detectable object)18 / 22 / 28 / 33 / 38 / 48 mm for the 10/14/20/25/30/40 mm pitches (= beam pitch + 8 mm), per the catalog's technical-parameter table. Not separately tabulated there for the 80 mm pitch.
Number of Beams6, 8 ... 32 (10/14/25 mm pitch); 4, 6 ... 32 (20/30/40/80 mm pitch)
Protected HeightBeam pitch x (number of beams - 1); 50 mm (DQZ06/10-50) up to 2480 mm (DQZ32/80-2480) across the catalog's model list
Sensing (Detection) Distance0.3-3 m for every model in the catalog's spec-overview table; a shorter 0.3-1 m code is also defined in the model-code breakdown
Response Time<= 15 ms
Ambient Light Immunity10,000 lux (incidence angle >= 5 degrees)
Enclosure RatingIP65
ControllerDQCA / DQCA2
Supply VoltageDC 12/24 V; AC 110-220 V (relay-output version)
Current Consumption<= 200 mA
OutputNPN/PNP type, sink current 500 mA, residual voltage under 1.5 V, with polarity, short-circuit and overload protection
Output StateON when beams clear (receiver indicator green)
IndicatorsTransmitter: power (red). Receiver: output -- clear (green) / blocked (red)
Light SourceModulated infrared LED
ConnectionCircular aviation connector with dedicated cable; transmitter 4-core, receiver 5-core per the parameter table (the wiring-diagram section is titled "dual 5-core")
Housing MaterialAluminium alloy; end caps ABS-reinforced nylon
Ambient Light ToleranceIncandescent: 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 HumidityOperating 35-85% RH; storage 35-95% RH
Mounting BracketDQBZ-01 fixing-screw set, included as standard equipment

Overview

DQZ is DAIDISIKE's ultra-thin, front-emitting through-beam safety light curtain: the optical window sits on the narrow 17.2 mm face of a 17.2 x 30 mm aluminium-alloy housing, rather than the wider 30 mm face used by standard-body curtains. This lets it be mounted flush in mold-area gaps, slide-table edges, and door-frame recesses where the available depth is too limited for a standard 30-35 mm-thick light curtain, without protruding into the machine's working envelope. Per the catalog, it is designed to the safety level of IEC 61496-1/-2, and separately cited against EN 61496-3:2019 Type 4 and EN 13849-1:2015 Category 4 (PLd); the catalog also references GB/T19436.1, GB4584-2007 and a GB/T19001-2016 idt ISO 9001:2015 quality-management-system certification. Certification documents are available on request.

The series covers seven beam pitches (10, 14, 20, 25, 30, 40 and 80 mm) within the same ultra-thin housing -- grouped by the catalog into finger (10/14 mm), palm (20/25 mm) and arm-or-body (30/40/80 mm) protection -- giving protective heights from 50 mm up to 2480 mm, so the same slim-body line can guard both small openings and full-height openings. The catalog notes that the 80 mm pitch and other special specifications are made to order rather than stock configurations.

Output is NPN/PNP transistor type (sink current 500 mA, residual voltage under 1.5 V), wired through a circular aviation connector via a dedicated cable (transmitter 4-core, receiver 5-core in the parameter table; the wiring-diagram section itself is titled "dual 5-core"). Sensing distance is 0.3-3 m for every model listed in the catalog's spec-overview table; the model-code breakdown also defines a shorter 0.3-1 m code. Response time is <=15 ms, ambient light immunity is 10,000 lux at an incidence angle of 5 degrees or more, the housing is rated IP65, and the DQBZ-01 fixing-screw mounting set ships as standard equipment.

Features & Benefits

17.2 mm Front-emitting Profile Fits Where Standard Units Cannot

The housing cross-section is 17.2 x 30 mm with the beam-emitting window on the 17.2 mm face, so the curtain installs flush into narrow slots, mold-area gaps, and door-frame recesses without protruding into the machine's working envelope.

Full Pitch Range Despite the Slim Housing

Seven pitch options (10, 14, 20, 25, 30, 40 and 80 mm) are all available in the same ultra-thin housing, covering finger-level detection through to hand/arm and body-level detection in one product family.

Protective Heights Up to 2480 mm

Model coverage runs from short 4-axis units up to 32-axis units at 80 mm pitch (2480 mm protective height), so the same slim-body series can guard both small openings and full-height openings.

NPN/PNP Selectable Transistor Output, Dual 5-core Wiring

Output signal type can be selected between NPN and PNP, allowing compatibility with both NPN-common and PNP-common PLC/controller input conventions; wiring uses dual 5-core cable.

Dedicated DQBZ-01 Mounting Bracket Included as Standard

Because the ultra-thin housing differs from standard-body light curtains, a matched low-profile mounting bracket (DQBZ-01) is supplied as standard equipment rather than as an optional accessory.

Systematic Model Naming for Straightforward Part Identification

Model codes follow a fixed pattern: DQZ + number of beam axes + '/' + pitch (mm) + '-' + protective height (mm), making it easy to cross-check a spec sheet against the correct part number.

Applications

Mold-area Guarding on Injection or Die-casting Machines — Narrow gaps around mold platens often leave only enough depth for a slim housing; the 17.2 mm front-emitting profile can be mounted flush in this space without interfering with mold travel.
Slide-table Edge / Stamping Die Opening Protection — Stamping and slide-table applications frequently have limited clearance at the point of operation; the same narrow-slot mounting capability applies to hand/finger protection at the die opening.
Automatic Door and Safety Door Frame Entry Detection — Mounting inside a door frame without reducing the usable door opening is possible because the curtain's depth footprint is small, unlike wider-bodied curtains that would eat into the passage width.
Compact Assembly Equipment and Desktop/Benchtop Machine Openings — Small machines with limited internal mounting depth, such as benchtop presses and compact automation cells, can accommodate the DQZ where standard-body curtains would not fit inside the enclosure.
Retrofitting Existing Machines with Narrow Guard-opening Depth — Where an existing machine opening was not originally designed to accept a full-depth safety light curtain, the slim profile allows a guarding upgrade without machine structural modification.
Finger-level and Hand/Arm-level Detection Selection Within One Family — The 10 mm pitch option supports finger-level detection while the 40/80 mm pitch options serve hand/arm or body-level detection, letting one product family serve multiple detection resolutions in narrow-depth installations.

Models & Ordering Information

102 standard models across 7 beam-pitch options. Select the pitch your risk assessment calls for, then the protective height that covers the opening.

Beam axis count 06-32

DQZ Ultra-thin (Front-emitting) Safety Light Curtain — 10 mm beam pitch, 14 standard models
ModelBeam pitch K (mm)Number of beams NProtective height H (mm)
DQZ06/10-5010650
DQZ08/10-7010870
DQZ10/10-90101090
DQZ12/10-1101012110
DQZ14/10-1301014130
DQZ16/10-1501016150
DQZ18/10-1701018170
DQZ20/10-1901020190
DQZ22/10-2101022210
DQZ24/10-2301024230
DQZ26/10-2501026250
DQZ28/10-2701028270
DQZ30/10-2901030290
DQZ32/10-3101032310

14 standard models at 10 mm pitch · 102 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 DQZ model code

DQZ [beams] / [pitch] - [protected height] [signal output] [sensing distance] [special marking]
DQZ = series (17.2 x 30 mm ultra-thin, front-emitting). [beams] = 04, 06, 08, 10 ... 32. [pitch] = 10-10 / 14-14 / 20-20 / 25-25 / 30-30 / 40-40 mm (80 mm pitch also available, made to order). [protected height] in mm = pitch x (beams - 1). [signal output] = A (NPN NC), B (PNP NC), C (NPN NO), D (PNP NO) -- default is A if not specified. [sensing distance] = A (0.3-1 m), B (0.3-3 m); every model in the catalog's own spec-overview table lists 0.3-3 m as its detection distance. [special marking] = blank box, used for special/custom requirements. Worked example from the catalog: DQZ08/40-280 D = 8 beams, 40 mm pitch, 280 mm protected height, PNP NO (D) output.

How to Select

  1. Choose 10 mm pitch for finger-level protection needs; 14/20/25 mm for hand-level; 30/40 mm for hand/arm-level; 80 mm for larger body/arm-level detection where finer resolution is not required.
  2. Match the required guarded opening height to the height value in the model code, for example DQZ12/20-240 denotes 240 mm protective height at 20 mm pitch.
  3. Select NPN output for controllers/PLCs expecting NPN (sinking) input signals, or PNP for controllers expecting PNP (sourcing) input signals, confirming against the receiving PLC's input module specification before ordering.
  4. Confirm the available mounting-slot depth is compatible with the 17.2 x 30 mm housing cross-section before specifying DQZ over a standard-body light curtain.
  5. DQBZ-01 mounting brackets are included as standard, so no separate bracket purchase is required for a standard installation.

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

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

Mounting depth is not constrained -- a standard-body curtain fits the opening

Why not: DQZ's whole point is the 17.2 mm ultra-thin front-emitting profile for slots too narrow for standard units; where depth is not a constraint, the ultra-thin housing adds cost and complexity without a corresponding benefit.

Use instead: The DQC general-purpose safety light curtain for openings where mounting depth is not restricted.

The beams need to exit from the side of the housing, not the narrow front face

Why not: DQZ is front-emitting -- the optical window is on the 17.2 mm face of a 17.2 x 30 mm housing. Where the front face has no exit clearance but the side of the housing does, a front-emitting curtain cannot be oriented to suit the gap.

Use instead: The DQB ultra-thin side-emitting safety light curtain (15 x 30 mm housing, beams exit the side face).

True sub-15 mm finger-detection accuracy is required by the risk assessment

Why not: The finest DQZ pitch is 10 mm, but its detection accuracy (minimum detectable object) is 18 mm (pitch + 8 mm) per the catalog's parameter table -- a hand-level rather than a strict fingertip figure, even though the catalog labels the 10/14 mm pitches as finger protection.

Use instead: Confirm the required detection capability against an ISO 13855 risk assessment before specifying; ask us for a finer-resolution option if true sub-15 mm finger detection is mandatory.

The transmitter-to-receiver span needs a sensing distance materially beyond 0.3-3 m

Why not: Every model in the DQZ catalog's spec-overview table lists 0.3-3 m as its sensing distance (with a shorter 0.3-1 m code also defined); the catalog does not publish a longer stock DQZ configuration and directs long-range requests to customer service.

Use instead: The DQA long-distance safety light curtain (sensing distance selectable up to 0.3-40 m) for spans beyond DQZ's catalogued range.

Washdown, high-pressure hosing, or ambient temperature outside -10 to +40 degrees C

Why not: The DQZ housing is rated IP65 -- dust-tight and protected against low-pressure water jets, but not against high-pressure jetting or immersion -- and its operating range is -10 to +40 degrees C, non-condensing.

Use instead: The DQR waterproof safety light curtain series for wet or washdown areas, or a heated/sheltered enclosure (or confirm a wide-temperature option with us) for out-of-range ambient temperatures.

More than 32 beam axes, or a protected height beyond 2480 mm, are needed

Why not: DQZ's catalogued model list stops at 32 beam axes and a 2480 mm protected height (DQZ32/80-2480 at the coarsest 80 mm pitch).

Use instead: The DQT series for taller openings requiring more beam axes at a compact pitch, on the same general safety-light-curtain platform.

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.

  • Detection accuracy (minimum detectable object) for the 80 mm pitch is not listed in the catalog's technical-parameter table (only the 10-40 mm pitches are tabulated); the pitch+8 mm pattern would suggest 88 mm, but this exact figure is not stated by the factory for 80 mm.
  • The catalog notes that the 80 mm pitch and other special specifications are made to order -- lead time, minimum order quantity, and stock availability for 80 mm-pitch DQZ units need confirming.
  • PFHd, MTTFd and DCavg figures needed to integrate DQZ into a full ISO 13849-1 machine-level calculation. The catalog states a Category 4 (PLd) design basis but does not publish these numbers.
  • TUV and UL certificate numbers and their exact scope (which models/configurations they cover). Certification documents are available on request.
  • Exact cable core count and pinout (transmitter 4-core / receiver 5-core vs dual 5-core appear in different catalog sections) — ask us for the confirmed wiring diagram before installation
  • Cable length options beyond what is shown in the wiring diagrams.
  • Safety-distance calculation guidance (ISO 13855) and any response-time variation by beam count -- the catalog gives only the <= 15 ms maximum.
  • Muting or fixed/floating blanking function availability and configuration -- not mentioned on the DQZ catalog pages.

Frequently Asked Questions

What makes the DQZ different from a standard safety light curtain?
Its housing cross-section is 17.2 x 30 mm with the optical (beam) window on the 17.2 mm front face, rather than the wider face used by most standard safety light curtains. This lets it be installed in mounting spaces too narrow for standard-body units.
What beam pitch options does DQZ offer?
Seven pitch options: 10, 14, 20, 25, 30, 40 and 80 mm, selected via the model number.
What is the maximum protective height available?
Up to 2480 mm, at the 80 mm pitch, 32-axis configuration (model DQZ32/80-2480).
What is the minimum protective height available?
50 mm, at the 10 mm pitch, 6-axis configuration (model DQZ06/10-50).
Does DQZ support both NPN and PNP output?
Yes, the output type is transistor output with NPN/PNP signal selectable, so it can interface with either NPN-common or PNP-common controller inputs.
How is the DQZ wired?
Dual 5-core wiring is used for connection.
What mounting bracket comes with DQZ?
The DQBZ-01 mounting bracket is included as standard equipment.
How do I read a DQZ model number?
The format is DQZ + number of beam axes + '/' + pitch (mm) + '-' + protective height (mm). For example, DQZ12/20-240 means 12 beam axes, 20 mm pitch, 240 mm protective height.
What is the smallest configuration available for narrow openings?
DQZ04/20-60 (4 axes, 20 mm pitch, 60 mm protective height) is among the smallest configurations listed, alongside DQZ04/30-90 and DQZ04/40-120 in the 30 mm and 40 mm pitch series.
What is the difference between DQZ and DQB ultra-thin safety light curtains?
DQZ emits from the narrow front face of a 17.2 x 30 mm housing, while DQB emits from the side of a thinner housing. Selection depends on which face of the guarded gap the beams need to exit from.
Can DAIDISIKE provide certification documents for the DQZ series?
Certification documents are available on request.

Works Well Together

On the same machine or line, DQZ is typically ordered together with: Safety Relays · Safety Door Locks & Switches · Press & Press Brake Protection

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Non-contact coded-magnet safety switch with 17 mm sensing range and high misalignment tolerance for guard doors.

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Ram-mounted laser guarding that tracks the punch tip on press brakes and shears without blocking hand-fed work.

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