DQS Press Photoelectric Safety Guard

Name: DQS Press Photoelectric Safety Guard
Brand: DAIDISIKE
SKU: dqs-press-photoelectric-safety-guard
Availability: InStock

Type 4 press light curtain plus dedicated controller: dual relay outputs wire straight into your press circuit.

▶ Watch it in action: Installing a Safety Light Curtain on a Punch Press — Mounting, Alignment & Test

DQS Press Photoelectric Safety Guard - product photo

🔍 Click to enlarge · 1/24

Technical Specifications

Series	DQS
Safety category	Type 4
Beam pitch (resolution)	10 / 14 / 20 / 25 / 30 / 40 / 80 mm
Sensing (detection) range	A = 0.3-3m ~ H = 0.3-40m (selected by order code)
Response time	≤ 10 ms
Output	Via controller, dual relay outputs; NPN/PNP options; some controllers include EDM
Controller output contact rating	AC250V/5A or DC30V/5A
Sensor supply voltage	DC 12/24V
Controller supply voltage	AC110-220V ±15%
Protection rating	IP65
Housing dimensions	approx. 35 × 51 mm

Overview

DQS is a Type 4 electro-sensitive protective equipment (ESPE) light curtain system built specifically for point-of-operation guarding on mechanical, pneumatic, and hydraulic power presses. It consists of an emitter/receiver light curtain pair and one of four controller variants (DQSW, DQSN, DQSS, DQSP), which convert the beam-interrupt signal into dual relay dry-contact outputs suitable for direct integration into a press's safety control circuit. It is intended for two buyer groups: machine builders/OEMs integrating point guarding into new press designs, and plant engineers retrofitting older mechanical or pneumatic presses that lack modern electrical safety circuits.

DQS ships as a complete guarding solution rather than a bare light curtain: the dedicated controller's dual relay dry-contact outputs wire directly into a press's clutch-brake or control circuit without a separate safety relay module or PLC. It offers seven beam-pitch options (10/14/20/25/30/40/80 mm) across 4 to 32 beams, covering protective heights from 50 mm to 2480 mm, with a response time of ≤10 ms, NPN/PNP output selection, and optional EDM (External Device Monitoring) on some controller variants.

Key Facts — DQS at a glance

DQS is a Type 4 photoelectric safety light curtain system for point-of-operation guarding on power presses, combining a light curtain with a dedicated safety controller that outputs dual relay dry contacts.
DQS has a response time of ≤10 ms.
DQS is available in seven beam-pitch options — 10, 14, 20, 25, 30, 40, and 80 mm — with 4 to 32 beams, giving protective heights from 50 mm to 2480 mm.
DQS controllers are available in external stand-alone form (DQSW, DQSS) for retrofit installations and built-in panel-mount form (DQSN, DQSP) for OEM integration.
DQS controller output contacts are rated AC250V/5A or DC30V/5A.
DQS sensor operates on DC12/24V; the controller operates on AC110-220V (±15%); the housing is IP65-rated with a body cross-section of approximately 35 x 51 mm.

Features & Benefits

Complete guarding solution, no separate safety relay or PLC needed

DQS ships as a light curtain plus dedicated safety controller (DQSW/DQSN/DQSS/DQSP) whose dual relay dry-contact outputs wire directly into a press control/clutch-brake circuit, so a facility retrofitting an older mechanical or pneumatic press can install it without adding a separate safety relay module or PLC logic.

≤10 ms response time shortens the required safety distance

Because minimum safety mounting distance is a function of response time plus stopping time, DQS's ≤10 ms response allows the light curtain to be positioned closer to the die opening than curtains with slower response, leaving more working space on the press bed for loading and unloading parts.

Type 4 rating, the category used for point-of-operation guarding

DQS is rated Type 4, the ESPE category commonly required for point-of-operation guarding applications on power presses.

Seven beam-pitch options let buyers match resolution to the die opening precisely

With beam pitches of 10/14/20/25/30/40/80 mm and 4-32 beams, DQS covers protective heights from 50 mm to 2480 mm across the model range, so buyers can select a resolution/height combination that fits their press opening instead of jumping to a coarser or oversized standard step.

External and built-in controller options serve both retrofit and OEM integration

DQSW/DQSS are external stand-alone controller enclosures suited to retrofitting existing presses without modifying original wiring, while DQSN/DQSP are built-in controllers suited to being panel-mounted inside a new machine's electrical cabinet by an OEM machine builder.

NPN/PNP output options and optional EDM for downstream contactor monitoring

DQS supports NPN and PNP output selection to suit sinking or sourcing control architectures, and some controller variants include EDM (External Device Monitoring), which checks the status of downstream contactors/relays and inhibits restart if a monitored contact has welded shut.

Universal AC110-220V (±15%) controller supply plus dual-voltage DC12/24V sensor supply

The controller accepts AC110-220V with ±15% tolerance and the sensor operates on DC12/24V, so the same part number can be used across 110V and 220V mains without changing model, and the tolerance band accommodates factory grids with voltage fluctuation.

IP65-rated, compact 35 x 51 mm housing

The IP65 rating protects against dust and water jets, relevant to the oil mist and metal particulate environment of a stamping shop, and the roughly 35 x 51 mm cross-section keeps the sensor housing compact alongside the press bed.

Applications

Point-of-operation guarding on mechanical power presses — Type 4 rating and dual relay dry-contact output are the two features commonly required for this application on power presses.

Point-of-operation guarding on pneumatic presses — The same guarding principle applies to pneumatic clutch-brake presses; controller relay outputs can be wired into the pneumatic press's control circuit.

Point-of-operation guarding on hydraulic presses — Applicable wherever a vertical closing hazard point needs light-curtain interruption to stop the ram/slide.

Safety retrofit of older mechanical presses without modern safety circuits — The external controller (DQSW/DQSS) is a stand-alone enclosure with dry-contact relay output, letting a plant add point guarding to an existing press without redesigning the original electrical control panel.

OEM integration into new press designs — The built-in controller (DQSN/DQSP) is intended for panel mounting inside a machine builder's own electrical cabinet, allowing point guarding to be engineered in from the start.

Manual load/unload workstations on stamping automation lines — The light curtain guards the opening where an operator reaches in to place or remove parts near the die.

Guarding of comparable vertical closing-hazard machinery (press brakes, shears, riveting machines) — These machine types share the same point-hazard guarding principle as power presses, which is a common industry application pattern for this class of light curtain.

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.

DQS Press Photoelectric Safety Guard — 10 mm beam pitch, 14 standard models
Model	Beam pitch K (mm)	Number of beams N	Protective height H (mm)
DQS06/10-50	10	6	50
DQS08/10-70	10	8	70
DQS10/10-90	10	10	90
DQS12/10-110	10	12	110
DQS14/10-130	10	14	130
DQS16/10-150	10	16	150
DQS18/10-170	10	18	170
DQS20/10-190	10	20	190
DQS22/10-210	10	22	210
DQS24/10-230	10	24	230
DQS26/10-250	10	26	250
DQS28/10-270	10	28	270
DQS30/10-290	10	30	290
DQS32/10-310	10	32	310

DQS Press Photoelectric Safety Guard — 14 mm beam pitch, 14 standard models
Model	Beam pitch K (mm)	Number of beams N	Protective height H (mm)
DQS06/14-70	14	6	70
DQS08/14-98	14	8	98
DQS10/14-126	14	10	126
DQS12/14-154	14	12	154
DQS14/14-182	14	14	182
DQS16/14-210	14	16	210
DQS18/14-238	14	18	238
DQS20/14-266	14	20	266
DQS22/14-294	14	22	294
DQS24/14-322	14	24	322
DQS26/14-350	14	26	350
DQS28/14-378	14	28	378
DQS30/14-406	14	30	406
DQS32/14-434	14	32	434

DQS Press Photoelectric Safety Guard — 20 mm beam pitch, 15 standard models
Model	Beam pitch K (mm)	Number of beams N	Protective height H (mm)
DQS04/20-60	20	4	60
DQS06/20-100	20	6	100
DQS08/20-140	20	8	140
DQS10/20-180	20	10	180
DQS12/20-220	20	12	220
DQS14/20-260	20	14	260
DQS16/20-300	20	16	300
DQS18/20-340	20	18	340
DQS20/20-380	20	20	380
DQS22/20-420	20	22	420
DQS24/20-460	20	24	460
DQS26/20-500	20	26	500
DQS28/20-540	20	28	540
DQS30/20-580	20	30	580
DQS32/20-620	20	32	620

DQS Press Photoelectric Safety Guard — 25 mm beam pitch, 14 standard models
Model	Beam pitch K (mm)	Number of beams N	Protective height H (mm)
DQS06/25-125	25	6	125
DQS08/25-175	25	8	175
DQS10/25-225	25	10	225
DQS12/25-275	25	12	275
DQS14/25-325	25	14	325
DQS16/25-375	25	16	375
DQS18/25-425	25	18	425
DQS20/25-475	25	20	475
DQS22/25-525	25	22	525
DQS24/25-575	25	24	575
DQS26/25-625	25	26	625
DQS28/25-675	25	28	675
DQS30/25-725	25	30	725
DQS32/25-775	25	32	775

DQS Press Photoelectric Safety Guard — 30 mm beam pitch, 15 standard models
Model	Beam pitch K (mm)	Number of beams N	Protective height H (mm)
DQS04/30-90	30	4	90
DQS06/30-150	30	6	150
DQS08/30-210	30	8	210
DQS10/30-270	30	10	270
DQS12/30-330	30	12	330
DQS14/30-390	30	14	390
DQS16/30-450	30	16	450
DQS18/30-510	30	18	510
DQS20/30-570	30	20	570
DQS22/30-630	30	22	630
DQS24/30-690	30	24	690
DQS26/30-750	30	26	750
DQS28/30-810	30	28	810
DQS30/30-870	30	30	870
DQS32/30-930	30	32	930

DQS Press Photoelectric Safety Guard — 40 mm beam pitch, 15 standard models
Model	Beam pitch K (mm)	Number of beams N	Protective height H (mm)
DQS04/40-120	40	4	120
DQS06/40-200	40	6	200
DQS08/40-280	40	8	280
DQS10/40-360	40	10	360
DQS12/40-440	40	12	440
DQS14/40-520	40	14	520
DQS16/40-600	40	16	600
DQS18/40-680	40	18	680
DQS20/40-760	40	20	760
DQS22/40-840	40	22	840
DQS24/40-920	40	24	920
DQS26/40-1000	40	26	1000
DQS28/40-1080	40	28	1080
DQS30/40-1160	40	30	1160
DQS32/40-1240	40	32	1240

DQS Press Photoelectric Safety Guard — 80 mm beam pitch, 15 standard models
Model	Beam pitch K (mm)	Number of beams N	Protective height H (mm)
DQS04/80-240	80	4	240
DQS06/80-400	80	6	400
DQS08/80-560	80	8	560
DQS10/80-720	80	10	720
DQS12/80-880	80	12	880
DQS14/80-1040	80	14	1040
DQS16/80-1200	80	16	1200
DQS18/80-1360	80	18	1360
DQS20/80-1520	80	20	1520
DQS22/80-1680	80	22	1680
DQS24/80-1840	80	24	1840
DQS26/80-2000	80	26	2000
DQS28/80-2160	80	28	2160
DQS30/80-2320	80	30	2320
DQS32/80-2480	80	32	2480

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.

Controllers

DQSWDQSNDQSSDQSP

DQSW and DQSS are external stand-alone enclosures; DQSN and DQSP are built-in controllers. Output code (OC = one NO + one NC, 2C = two NC, 2O = two NO) is appended to the controller model, e.g. DQSW-OC.

Accessories

DQCA-01

Optional accessory; specific function not detailed in the source catalogue.

How to Select

Choose beam pitch (10/14/20/25/30/40/80 mm) to match resolution to the die opening: finer pitch (10-14mm) suits small openings needing finger-level resolution, coarser pitch (40-80mm) suits larger openings where hand/arm-level detection is sufficient.
Choose protective height by beam count (4-32) at the chosen pitch; the model number encodes this directly, e.g. DQS16/20-320 = 16 beams at 20mm pitch = 320mm protective height.
Select sensing (operating) range via the detection-distance code (A-H) appended to the order code, and confirm the exact distance-band table with the factory before specifying.
Choose controller form factor: external stand-alone (DQSW, DQSS) for retrofitting an existing press without modifying its control cabinet, or built-in/panel-mount (DQSN, DQSP) for OEM integration into a new machine's electrical cabinet.
Choose output configuration — OC (one NO + one NC), 2C (two NC), or 2O (two NO) — appended to the controller code (e.g. DQSW-OC), to match the press's existing safety circuit logic.
Choose NPN or PNP sensor-side output to match whether the press's control architecture is sinking (NPN) or sourcing (PNP).
Confirm sensor supply DC12/24V and controller supply AC110-220V (±15%) match the plant's available power before ordering.

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

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

Guarding a press brake bend zone or shear blade where the guard must track the moving ram/tool tip

Why not: DQS is a fixed area-type Type 4 light curtain covering a set protective height (50-2480 mm); it does not move with a ram the way a beam-tracking device would.

Use instead: DKE-L3 ram-mounted laser guard

The die opening needs more than 32 beams or a protective height beyond 2480 mm

Why not: DQS's model range covers 4 to 32 beams per side, giving protective heights up to 2480 mm at 80 mm pitch.

Use instead: DQV series (same platform, extends to 72 beams and 5680 mm)

The machine has two separate hazardous access sides that both need light-curtain interlocking

Why not: DQS is built as a single-side light curtain with one controller and one output circuit.

Use instead: DQV double-sided photoelectric safety protection device

The downstream circuit needs a multi-mode safety relay (e-stop, door interlock, two-hand control) rather than a simple dry-contact/transistor trip signal

Why not: DQS controller output is limited to dual relay dry contacts or NPN/PNP transistor signals; it is not a configurable multi-function safety relay.

Use instead: DA31 or DQSRN safety relay module downstream of the DQS controller output

A formal ISO 13849 risk assessment requires documented PFHd/MTTFd/B10d/PL or Category figures beyond the Type 4 rating

Why not: The published spec gives a Type 4 (IEC 61496 ESPE category) rating but no PFHd, MTTFd, B10d, or PL/Category figure specific to DQS.

Use instead: Request this documentation from the factory before specifying

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 figure separate from the beam-pitch resolution spec
Operating temperature range
Housing/lens material
Certificate numbers and scope for the Type 4 / IEC 61496 rating
PFHd, MTTFd, B10d, and Category/PL figures for formal ISO 13849 risk-assessment documentation
Exact sensing-range distance-band table for order codes A through H
Function and wiring of the optional DQCA-01 accessory
EDM (External Device Monitoring) availability confirmed per specific controller/output-code combination

Frequently Asked Questions

What does DQS stand for and what is it used for?

DQS is a Type 4 photoelectric safety light curtain system designed specifically for point-of-operation guarding on power presses — protecting the die opening/closing point on mechanical, pneumatic, or hydraulic presses.

Does DQS need a separate safety relay module to connect to my press?

No. The DQS controller (DQSW, DQSN, DQSS, or DQSP) outputs dual relay dry contacts that wire directly into the press control or clutch-brake circuit, so a separate safety relay module is not required for the light curtain interface itself.

What is the response time of DQS?

The response time is ≤10 ms as stated in the product data. This applies to the safety distance calculation between the light curtain and the hazard point.

What beam pitch (resolution) options are available?

Seven beam-pitch options: 10, 14, 20, 25, 30, 40, and 80 mm.

What protective heights does DQS cover?

From 50 mm (e.g. DQS06/10-50) up to 2480 mm (e.g. DQS32/80-2480) across the model range, depending on beam count and pitch selected.

What is the difference between DQSW, DQSN, DQSS, and DQSP controllers?

DQSW and DQSS are external, stand-alone controller enclosures suited to retrofit installations. DQSN and DQSP are built-in controllers suited to panel-mounting inside an OEM machine builder's electrical cabinet.

Does DQS support both NPN and PNP output?

Yes, NPN and PNP output options are both available to suit different control architectures.

What is EDM and does DQS have it?

EDM (External Device Monitoring) checks the status of downstream contactors/relays and inhibits machine restart if a monitored contact has welded closed. Some DQS controller variants include this feature; confirm availability on the specific controller and output configuration ordered.

What power supply does DQS require?

The sensor operates on DC12/24V; the controller operates on AC110-220V with ±15% tolerance.

What is the difference between DQS and DQV?

DQS and DQV are on the same platform. DQS covers 4-32 beams (protective heights up to 2480mm). For openings requiring more than 32 beams or greater protective height, the DQV series is used instead.

What is the housing protection rating and size?

IP65, with a body cross-section of approximately 35 x 51 mm.

Is DQS certified to IEC 61496 Type 4 or other safety standards?

Certification documents are available on request.

Works Well Together

On the same machine or line, DQS is typically ordered together with: Safety Light Curtains · Safety Relays · Safety Mats

Related Products in Press & Press Brake Protection

Browse all Press & Press Brake Protection →