Type 4 safety light curtain engineered for high-risk machinery. Conforms to PLe (EN ISO 13849), SIL3, Cat.4. Redundant OSSD dual-channel outputs with self-diagnostics and EDM monitoring. 30×30 mm compact body; resolutions 7.5/15/30 mm. Model sizing follows L = P + H + J, where H=(n−1)×K.
Type 4 architecture: PLe / SIL3 / Cat.4Redundant OSSD dual outputs with self-diagnosticsStandard brackets and aviation/M12 connectors
Product Highlights
Type 4 safety level — PLe (EN ISO 13849), SIL3, Cat.4; designed for high-risk safeguarding.
Redundant OSSD with self-diagnostics; fault/short/over-current protection and clear indicators.
EDM monitoring ready; supports reset logic and external device feedback.
Flexible options: muting/blanking, cascade, mirror protection and more (per model).
Resolutions 7.5 / 15 / 30 mm; robust anti-interference up to strong ambient light.
30×30 mm compact body; IP65; aviation/M12 connectors and standard right-angle brackets.
Summarized from supplied manuals. If any discrepancy exists, the official datasheet and delivered certificates prevail.
Resolution & Application Guide
Resolution (K)
Typical Application
7.5 mm
Finger protection near hazard; dense beam fields
15 mm
Palm protection; general access openings
30 mm
Hand/arm or body presence; aisle and perimeter guarding
Protective height H = (n − 1) × K. Overall length L = P + H + J. P/J depend on resolution; see spec tabs.
Technical Parameters (DQT4 Series)
Category
Item
Typical Value / Option
Notes
Safety
Standard level
Type 4; PLe (EN ISO 13849), SIL3, Cat.4
Designed for high-risk applications
Outputs
Redundant OSSD dual-channel (PNP/NPN models)
Self-diagnostics; EDM monitoring
Response
≤ 20 ms (typ.)
Varies with beams/resolution
Functions
Muting / Blanking / Cascade (per model)
Reset logic supported
Immunity
High ambient-light immunity
Designed to resist flicker/glare
Compliance
IEC 61496-1/-2
Safety distance design per ISO 13855
Optical
Resolutions (K)
7.5 / 15 / 30 mm
Finger / Palm / Hand–Body
Protective height (H)
H = (n − 1) × K
n = beam count
Detection distance
0.3–3 m
Application dependent
Operating principle
Through-beam infrared LED, modulated
Emitter/Receiver pair
Indicators
Power / Blocked / Status
Optional numeric display
Electrical
Supply
DC 12/24 V; AC 110–220 V (with controller)
Reverse/over-voltage protection
Channel capability
≤ 200 mA (typ.)
Transistor outputs
Protection
Short / Over-current / Over-load
Auto recovery
Connector
Aviation / M12
Standard cables & brackets
Sync
Optical synchronization
Reduced wiring, stable commissioning
Mechanical / Environment
Body section
~30 × 30 mm
Aluminum housing
Overall length
L = P + H + J
P/J by resolution
Ingress protection
IP65
Dust-tight, water-jet resistant
Temperature / Humidity
−10 ~ +55 °C; 20 °C, RH ≤ 85%
Typical values
DQT4 Series Detailed Specifications
Tables list typical beam counts (n) for each resolution (K) with protective height H and overall length L. Model format: DQT4-K-NN-H. Sizing constants taken from mechanical drawings.
K (mm)
Beams n
Protective Height H (mm)
P/J (mm)
Overall Length L (mm)
Model Example
Detection Distance
7.5
15
105
13.74/19.46
138.2
DQT4-7.5-15-105
0.3–3 m
7.5
23
165
13.74/19.46
198.2
DQT4-7.5-23-165
0.3–3 m
7.5
31
225
13.74/19.46
258.2
DQT4-7.5-31-225
0.3–3 m
7.5
39
285
13.74/19.46
318.2
DQT4-7.5-39-285
0.3–3 m
7.5
47
345
13.74/19.46
378.2
DQT4-7.5-47-345
0.3–3 m
7.5
55
405
13.74/19.46
438.2
DQT4-7.5-55-405
0.3–3 m
7.5
63
465
13.74/19.46
498.2
DQT4-7.5-63-465
0.3–3 m
7.5
71
525
13.74/19.46
558.2
DQT4-7.5-71-525
0.3–3 m
7.5
79
585
13.74/19.46
618.2
DQT4-7.5-79-585
0.3–3 m
7.5
87
645
13.74/19.46
678.2
DQT4-7.5-87-645
0.3–3 m
7.5
95
705
13.74/19.46
738.2
DQT4-7.5-95-705
0.3–3 m
7.5
103
765
13.74/19.46
798.2
DQT4-7.5-103-765
0.3–3 m
7.5
111
825
13.74/19.46
858.2
DQT4-7.5-111-825
0.3–3 m
7.5
119
885
13.74/19.46
918.2
DQT4-7.5-119-885
0.3–3 m
7.5
127
945
13.74/19.46
978.2
DQT4-7.5-127-945
0.3–3 m
7.5
135
1005
13.74/19.46
1038.2
DQT4-7.5-135-1005
0.3–3 m
7.5
143
1065
13.74/19.46
1098.2
DQT4-7.5-143-1065
0.3–3 m
7.5
151
1125
13.74/19.46
1158.2
DQT4-7.5-151-1125
0.3–3 m
7.5
159
1185
13.74/19.46
1218.2
DQT4-7.5-159-1185
0.3–3 m
7.5
167
1245
13.74/19.46
1278.2
DQT4-7.5-167-1245
0.3–3 m
7.5
175
1305
13.74/19.46
1338.2
DQT4-7.5-175-1305
0.3–3 m
7.5
183
1365
13.74/19.46
1398.2
DQT4-7.5-183-1365
0.3–3 m
7.5
191
1425
13.74/19.46
1458.2
DQT4-7.5-191-1425
0.3–3 m
7.5
199
1485
13.74/19.46
1518.2
DQT4-7.5-199-1485
0.3–3 m
7.5
207
1545
13.74/19.46
1578.2
DQT4-7.5-207-1545
0.3–3 m
7.5
215
1605
13.74/19.46
1638.2
DQT4-7.5-215-1605
0.3–3 m
7.5
223
1665
13.74/19.46
1698.2
DQT4-7.5-223-1665
0.3–3 m
7.5
231
1725
13.74/19.46
1758.2
DQT4-7.5-231-1725
0.3–3 m
7.5
239
1785
13.74/19.46
1818.2
DQT4-7.5-239-1785
0.3–3 m
7.5
247
1845
13.74/19.46
1878.2
DQT4-7.5-247-1845
0.3–3 m
7.5
255
1905
13.74/19.46
1938.2
DQT4-7.5-255-1905
0.3–3 m
7.5
263
1965
13.74/19.46
1998.2
DQT4-7.5-263-1965
0.3–3 m
7.5
271
2025
13.74/19.46
2058.2
DQT4-7.5-271-2025
0.3–3 m
7.5
279
2085
13.74/19.46
2118.2
DQT4-7.5-279-2085
0.3–3 m
7.5
287
2145
13.74/19.46
2178.2
DQT4-7.5-287-2145
0.3–3 m
7.5
295
2205
13.74/19.46
2238.2
DQT4-7.5-295-2205
0.3–3 m
7.5
303
2265
13.74/19.46
2298.2
DQT4-7.5-303-2265
0.3–3 m
7.5
311
2325
13.74/19.46
2358.2
DQT4-7.5-311-2325
0.3–3 m
7.5
319
2385
13.74/19.46
2418.2
DQT4-7.5-319-2385
0.3–3 m
Model example format: DQT4-K-NN-H. Use L = P + H + J with P/J from drawings. For special lengths or functions (muting/blanking), contact DAIDISIKE.
Typical Applications
Presses / press brakes / shears: near-hazard finger and palm protection with 7.5–15 mm resolutions.
Robot cells & assembly lines: perimeter and access guarding; muting/blanking for material flow.
Packaging & logistics: 30 mm for aisle and body presence detection.
General machinery: integrate with a safety relay/PLC for interlock, EDM and monitored reset.
Safety distance reference (ISO 13855): S = K × T + C, where T is machine stopping time.
