A long-range, through-beam safety light curtain for large machinery and guarding at distance — the DQA series extension for installations that need more than 32 beams. Resolutions 10/20/40/80 mm, up to 72 beams, protective heights 110–2840 mm. Transistor outputs with single- or dual-output signal selection and 5-core or 7-core wiring. Operating distance and response time are not published for this series — contact the factory with your actual span before finalising a layout.
Up to 72 beams — the highest beam count in the long-range family, for protective heights to 2840 mm from a single pair.
Long-range through-beam design for wide gates, large presses and perimeter spans.
Four beam pitches (10 / 20 / 40 / 80 mm), so a long span does not force a coarse resolution.
Self-diagnosis, short/over-current protection and clear indicators for fast commissioning and troubleshooting.
Simple wiring: 5-core or 7-core, with single- or dual-output signal selection.
The DQT is a through-beam AOPD 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 this series, nor a confirmed operating distance, response time, supply voltage, IP rating or operating temperature — none of these are stated on this page. Contact the factory for the confirmed values, or use the DQT4 series where a documented rating is required.
Resolution & Application Guide
Resolution (K)
Typical Application
10 mm
Finger / close-in guarding with long spans
20 mm
Palm / access openings
40 mm
Hand/arm or body presence along aisles and perimeters
80 mm
Perimeter / body detection with fewer beams
Protective height H = (n − 1) × K. Overall length L = P + H + J + 36 (18 mm end allowance on both sides). P/J vary with resolution; see spec tables below.
Technical Parameters (DQT Series)
Category
Item
Typical Value / Option
Notes
Optical
Operating principle
Through-beam infrared LED, modulated
Emitter/receiver pair
Resolution (beam pitch K)
10 / 20 / 40 / 80 mm
Finger / Palm / Hand-arm / Body
Beam count
Up to 72
The DQA extension above 32 beams
Protective height (H)
H = (n−1) × K; 110–2840 mm
n = number of beams
Response time
Contact factory
Not published for the DQT series
Detection distance
Contact factory
Long-distance series; confirmed range not published
Electrical / I/O
Outputs
Transistor; single- or dual-output signal selection
Specify on order
Wiring
5-core or 7-core
Per build
Supply voltage
Contact factory
Not published for the DQT series
Indicators
Power / Run / Blocked
Front LEDs
Mechanical / Environment
Body section
35 × 51 mm × L (same extrusion as the DQA series)
Per the DQA/DQT dimension drawing
Overall length
L = P + H + J + 36
18 mm allowance ×2; connector tail adds 44 mm
Ingress protection
Contact factory
Not published for the DQT series
Operating temp.
Contact factory
Not published for the DQT series
Compliance
Standards
Through-beam AOPD designed with reference to IEC 61496; safety distance per ISO 13855
No type class (Type 2/4) or performance level is published for this series — confirm with the factory
System integration
Safety relay / Safety PLC
Independent dual inputs
DQT Series Detailed Specifications
Tables enumerate the catalogued beam counts (n) per beam pitch (K) with protective height H and overall length L. Model format: DQTnn/K-H (e.g., DQT08/40-280).
K (mm)
Beams n
Protective Height H (mm)
P/J (mm)
Overall Length L (mm)
Model Example
Detection Distance
10
12
110
5/32
183
DQT12/10-110
Contact factory
10
14
130
5/32
203
DQT14/10-130
Contact factory
10
16
150
5/32
223
DQT16/10-150
Contact factory
10
18
170
5/32
243
DQT18/10-170
Contact factory
10
20
190
5/32
263
DQT20/10-190
Contact factory
10
22
210
5/32
283
DQT22/10-210
Contact factory
10
24
230
5/32
303
DQT24/10-230
Contact factory
10
26
250
5/32
323
DQT26/10-250
Contact factory
10
28
270
5/32
343
DQT28/10-270
Contact factory
10
30
290
5/32
363
DQT30/10-290
Contact factory
10
32
310
5/32
383
DQT32/10-310
Contact factory
10
34
330
5/32
403
DQT34/10-330
Contact factory
10
36
350
5/32
423
DQT36/10-350
Contact factory
10
38
370
5/32
443
DQT38/10-370
Contact factory
10
40
390
5/32
463
DQT40/10-390
Contact factory
10
42
410
5/32
483
DQT42/10-410
Contact factory
10
44
430
5/32
503
DQT44/10-430
Contact factory
10
46
450
5/32
523
DQT46/10-450
Contact factory
10
48
470
5/32
543
DQT48/10-470
Contact factory
10
50
490
5/32
563
DQT50/10-490
Contact factory
10
52
510
5/32
583
DQT52/10-510
Contact factory
10
54
530
5/32
603
DQT54/10-530
Contact factory
10
56
550
5/32
623
DQT56/10-550
Contact factory
10
58
570
5/32
643
DQT58/10-570
Contact factory
10
60
590
5/32
663
DQT60/10-590
Contact factory
10
62
610
5/32
683
DQT62/10-610
Contact factory
10
64
630
5/32
703
DQT64/10-630
Contact factory
10
66
650
5/32
723
DQT66/10-650
Contact factory
10
68
670
5/32
743
DQT68/10-670
Contact factory
10
70
690
5/32
763
DQT70/10-690
Contact factory
Specify the wiring (5-core or 7-core) on order. Keep model format DQTnn/K-H. The DQT is the catalogue's long-distance series, but the operating distance is not published in the DQT catalogue data — contact the factory to confirm the range for your span before you commit to a layout.
Typical Applications
Presses / shears / large gates: long-range guarding with fewer cables, high noise immunity.
Robot cells / logistics perimeters: body/presence detection with 40–80 mm resolutions.
Assembly / access openings: 10–20 mm for finger/palm detection over long spans.
General machinery: integrate with a safety relay/PLC (EDM/feedback) for reliable stops and interlocks.
Safety distance reference (ISO 13855): S = K × T + C, where T is the measured machine stopping time.
Frequently Asked Questions
What resolution should I choose for the DQT long-range light curtain?
Match the resolution to the smallest body part that can reach the hazard: 10 mm for finger protection, 20 mm for palm/hand access, and 40/80 mm for hand-arm or body/perimeter guarding. The DQT catalogue lists four beam pitches — 10, 20, 40 and 80 mm — so one long-range series covers presses, large gates and robot-cell perimeters.
What is the difference between the DQT and the DQA?
Beam count. The DQA is the long-range through-beam series up to 32 beams; the DQT is its extension for installations that need more — up to 72 beams, giving protective heights of 110–2840 mm. The two share the same long-range through-beam design and 5-core / 7-core wiring. If your part number would need more than 32 beams at the pitch you have chosen, the catalogue directs you from DQA to DQT.
What safety type / performance level does the DQT carry?
The DQT 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 DQT series, so none is claimed here; request the current test documentation from the factory before specifying the DQT into a rated safety function. Where a documented Type 4 / PL e / SIL 3 device is required, use the DQT4 series.
How do I calculate the minimum safety distance for the DQT?
Use ISO 13855: S = K × T + C, where K = 2000 mm/s is the hand-speed constant, T is the machine stop time plus the curtain response time, and C is the intrusion factor derived from the resolution. The DQT response time is not published in the catalogue data — obtain the confirmed figure from the factory before you calculate T. Our ISO 13855 calculator handles the rest.
What operating distance does the DQT reach?
The DQT is the catalogue's long-distance series, but DAIDISIKE has not published a confirmed operating-distance figure for it — an older DAIDISIKE web page quoted 3–35 m, which has not been verified against the current catalogue, so it is not stated here. Tell the factory your actual emitter-to-receiver span when you enquire and ask for the confirmed range in writing; on a long-span installation this figure decides whether the layout works at all.
