DQB Ultra-Thin Safety Light Curtain (ESPE)

Name: DQB Ultra-Thin Safety Light Curtain
Brand: DAIDISIKE
SKU: DQB-SERIES

Safety light curtain — installation and operation — video thumbnail — Watch on YouTube

Product Highlights

Ultra-thin design: Detection side only 15mm, saving installation space, easy to integrate into compact equipment.
Opto-electronic protective device: through-beam AOPD designed with reference to IEC 61496 and to the machinery-safety standards ISO 13849 / ISO 13855. No type class or performance level is published for this series — request the factory test documentation before specifying it into a rated safety function.
Solid-state output: transistor outputs with NPN/PNP and NO/NC selection (order suffix A = PNP NO, B = PNP NC, C = NPN NO, D = NPN NC); no mechanical wear, long lifespan.
Simple wiring: two 5-core cables; status indicators for troubleshooting.
Two pitch options: 20 mm for palm-level protection, 40 mm for hand/arm and body presence, in 100–1240 mm protective heights.

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

Resolution & Application Guide

Resolution (K)	Typical Application
20 mm	Palm protection (packaging, access openings)
40 mm	Hand/arm or body presence (aisles, zone guarding)

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

Technical Parameters (DQB Series)

Category	Item	Typical Value / Option	Notes
Optical	Operating principle	Through-beam infrared LED, modulated	Emitter/receiver pair
	Beam pitch (K)	20 / 40 mm	Palm / Hand-arm or Body
	Protective height (H)	H = (n−1) × K; 100–620 mm (K=20), 120–1240 mm (K=40)	n = number of beams
	Detection accuracy	18 mm (K=10) / 28 mm (K=20) / 48 mm (K=40)	Smallest object reliably detected
	Response time	≤ 15 ms	Catalogue value — use this in your ISO 13855 calculation
	Detection distance	0.3–3 m (code A 0.3–1 m, code B 0.3–3 m)	Per model-code legend and specification list
Light source	Modulated infrared LED	Catalogue: 调制红外LED
Ambient light immunity	10,000 Lux (incidence angle ≥ 5°)	Incandescent 3,000 Lx / sunlight 10,000 Lx on the receiving surface
Electrical / I/O	Outputs	NPN / PNP transistor, 500 mA max, saturation voltage < 1.5 V; polarity, short-circuit and overload protection	Suffix A = NPN NC, B = PNP NC, C = NPN NO, D = PNP NO (A is the default)
	Wiring	Two 5-core cables	Circular aviation socket; catalogue table lists 4-core emitter + 5-core receiver
	Supply voltage	DC 12 V / 24 V; AC 110–220 V on the relay-output build	Per catalogue technical-parameter table
	Current consumption	≤ 200 mA	Per catalogue technical-parameter table
	Indicators	Emitter: power indicator (red). Receiver: output indicator green = all beams clear, red = beam blocked	Status indication
Mechanical / Environment	Body section	15 × 30 mm (rectangular, ultra-thin side profile)	Catalogue outline size 30 × 15 × L mm
	Housing material	Aluminium alloy body, ABS reinforced-nylon end caps	Catalogue: 铝合金，端盖 ABS 增强尼龙
	Overall length	L = H + addon (59 mm for K=20; 52 mm for K=40)	Approx. values; see tables
	Ingress protection	IP65	Per catalogue technical-parameter table
	Operating temp.	−10 to +40 °C (non-freezing)	Storage −25 to +55 °C
	Humidity	35–85 % RH operating	35–95 % RH storage
Compliance	Standards	Through-beam AOPD designed with reference to IEC 61496 and machinery-safety standards ISO 13849 / ISO 13855	No type class (Type 2/4) or performance level is published for this series — confirm with the factory
Compliance	System integration	Safety relay / Safety PLC	Independent dual inputs recommended; confirm EDM support with the factory

DQB Series Detailed Specifications

Tables list the catalogued beam counts (n) for each beam pitch (K) with protective height H and overall length L. Model format: DQBnn/K-H. Example: DQB06/20-100 (K=20, n=6, H=100). Output: add A/B/C/D (PNP NO / PNP NC / NPN NO / NPN NC).

K (mm)	Beams n	Protective Height H (mm)	Overall Length L (mm)	Model Example	Detection Distance
20	6	100	159	DQB06/20-100	Contact factory
20	8	140	199	DQB08/20-140	Contact factory
20	10	180	239	DQB10/20-180	Contact factory
20	12	220	279	DQB12/20-220	Contact factory
20	14	260	319	DQB14/20-260	Contact factory
20	16	300	359	DQB16/20-300	Contact factory
20	18	340	399	DQB18/20-340	Contact factory
20	20	380	439	DQB20/20-380	Contact factory
20	22	420	479	DQB22/20-420	Contact factory
20	24	460	519	DQB24/20-460	Contact factory
20	26	500	559	DQB26/20-500	Contact factory
20	28	540	599	DQB28/20-540	Contact factory
20	30	580	639	DQB30/20-580	Contact factory
20	32	620	679	DQB32/20-620	Contact factory

Keep the model format DQBnn/K-H. Add A/B/C/D for output type (PNP NO / PNP NC / NPN NO / NPN NC). Detection distance is not published in the DQB catalogue data — contact the factory to confirm the operating range for your span.

Typical Applications

Presses / shears / press brakes: the 20 mm pitch suits palm-level hand protection where the ultra-thin 15 mm detection side has to fit a tight mounting channel.
Assembly fixtures & robot periphery: palm detection with interlocked safety loop; easy maintenance.
Packaging / logistics: 40 mm for aisle and presence detection.
General machinery: integrate with a safety relay/PLC for stop, interlock and EDM monitoring.

Safety distance reference (ISO 13855): S = K × T + C, where T is machine stopping time.

Frequently Asked Questions

What safety type / performance level does the DQB carry?

The DQB 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 (PL) for the DQB series, so no such rating is claimed here — request the current test documentation from the factory before specifying the DQB into a rated safety function. If your risk assessment requires a documented Type 4 / PL e / SIL 3 device, use the DQT4 series, which is catalogued with that rating.

Which resolution should I pick?

The DQB catalogue offers two beam pitches: 20 mm for palm protection on packaging and access openings, and 40 mm for hand, arm or body presence in aisles and zone guarding. For finger-resolution protection choose a finer-pitch series such as the DQC (from 10 mm) or DQT4 (7.5 mm). Protective height follows H = (n − 1) × K, where K is the beam pitch and n the beam count.

How do I wire the outputs, and does it support NPN and PNP?

The DQB uses transistor outputs with a selectable signal type, ordered by model suffix: A = NPN NC, B = PNP NC, C = NPN NO, D = PNP NO (A is supplied by default when nothing is specified). Rating is 500 mA with a saturation voltage below 1.5 V, with polarity, short-circuit and overload protection. Wiring is by two 5-core cables. Wire the safety outputs into independent dual inputs on a certified safety relay or PLC and connect EDM (external device monitoring) feedback so the system verifies the contactors before each restart. Confirm output current rating and EDM support with the factory for your build.

Can the DQB replace an Omron, Keyence or SICK safety light curtain?

In many cases yes, mechanically. The DQB shares the common through-beam infrared design and selectable NPN/PNP transistor outputs, so it fits similar brackets and safety-relay wiring. Match the beam pitch (20 or 40 mm), the protective height and the required operating distance to the unit being replaced, and re-verify the safety distance per ISO 13855. Where the original unit was a certified Type 4 device, confirm the equivalent documentation with the factory before swapping.

What is the response time, detection distance and ingress protection?

The DQB catalogue technical-parameter table gives a response time of ≤ 15 ms, an operating distance of 0.3–3 m (order code A = 0.3–1 m, code B = 0.3–3 m) and an IP65 aluminium housing. Also documented for the series: 15 × 30 mm ultra-thin body section, 20 / 40 mm beam pitch, protective heights 100–620 mm (20 mm pitch) and 120–1240 mm (40 mm pitch), DC 12/24 V supply at ≤ 200 mA, −10 to +40 °C operating range, transistor outputs A/B/C/D, two 5-core cables.

Specs reviewed by Engineer Cai, Senior Application Engineer. See certificates.