DQS Safety Light Curtain (Press Photoelectric Hand Guard)
Type 4 photoelectric safety light curtain engineered for press point-of-operation guarding. Compact ≈35×51 mm body with beam pitches 10/14/20/25/30/40/80 mm, 4–32 beams and protective heights 50–2480 mm; standard sensing range 0.3–3 m (order-code options up to 40 m); response ≤10 ms; enclosure IP65. Supplied with an external (DQSW/DQSS) or built-in (DQSN/DQSP) controller giving dual relay dry-contact outputs.
Type 4 — the ESPE category commonly required for point-of-operation guarding on power presses.
Complete solution: light curtain plus dedicated controller with dual relay dry-contact outputs (AC 250 V/5 A or DC 30 V/5 A) wiring straight into the press control / clutch-brake circuit — no separate safety relay module or PLC needed.
Fast response ≤10 ms helps shorten the required safety mounting distance while maintaining productivity.
Seven beam pitches (10/14/20/25/30/40/80 mm) with 4–32 beams cover protective heights from 50 mm to 2480 mm — match the die opening precisely instead of over-buying.
35×51 mm compact body; IP65 against the oil mist and metal dust of stamping shops.
NPN/PNP options; EDM (External Device Monitoring) available on selected controllers to detect welded downstream contactors and inhibit restart.
If any discrepancy with delivered datasheets/certificates, official documents prevail.
Resolution & Application Guide
Resolution (K)
Typical Application
10 / 14 mm
Finger protection (assembly, fixtures, close guarding)
20 / 25 mm
Palm protection (access openings on presses/packaging)
30 / 40 / 80 mm
Hand-arm / body presence, aisles or zone guarding
Protective height H = (n − 1) × K. Overall length for DQS L = P + H + J + 36 (diagram shows 18 mm + 18 mm end allowances). P/J depend on resolution; see tables.
Technical Parameters (DQS Series)
Category
Item
Typical Value / Option
Notes
Optical
Operating principle
Through-beam
Emitter/receiver pair
Beam pitch (K)
10 / 14 / 20 / 25 / 30 / 40 / 80 mm
Seven options, finger → body
Beam count (n)
4–32
More than 32 beams → DQV series
Protective height (H)
H = (n−1) × K; 50–2480 mm
Encoded in the model number
Response time
≤ 10 ms
—
Sensing range
0.3–3 m (code A) up to 0.3–40 m (code H)
Confirm the exact A–H band with the factory when ordering
Electrical / I/O
Sensor supply
DC 12/24 V
—
Controller supply
AC 110–220 V ±15%
Serves both 110 V and 220 V mains
Controller output
Dual relay, dual output (volt-free dry contact)
Wires directly into the press control / clutch-brake circuit
Contact rating
AC 250 V / 5 A or DC 30 V / 5 A
Controller output contacts
Output configuration code
OC = 1 NO + 1 NC / 2C = two NC / 2O = two NO
e.g. DQSW-OC
Sensor output options
NPN / PNP
EDM available on selected controllers
Mechanical / Environment
Body section
≈35 × 51 mm
—
Overall length
L = P + H + J + 36
P/J from dimension table
Ingress protection
IP65
Dust-tight, water-jet resistant
Housing material
Contact factory
Not stated in current factory data
Operating temperature
Contact factory
Not stated in current factory data
Compliance
Safety type
Type 4
ESPE category relevant to point-of-operation guarding, per the IEC 61496 classification
Certificates
Contact factory
Third-party certificates supplied with the order; no certification level is claimed here
Controller family
DQSW / DQSN / DQSS / DQSP
W/S external stand-alone, N/P built-in
Optional accessory
DQCA-01
Optional
DQS Series Detailed Specifications
Tables compute beam count n, protective height H and overall length L from the dimension chart: H=(n−1)×K, L=P+H+J+36. P/J(mm) by resolution: 10→5/32, 14→7/32, 20→10/25, 25→12.5/25, 30→15/25, 40→20/25, 80→40/25. Standard range is 0.3–3 m; extended ranges available by code.
K (mm)
Beams n
Protective Height H (mm)
P/J (mm)
Overall Length L (mm)
Model Example
Range
10
6
50
5/32
123
DQS06/10-50
0.3–3 m (std)
10
8
70
5/32
143
DQS08/10-70
0.3–3 m (std)
10
10
90
5/32
163
DQS10/10-90
0.3–3 m (std)
10
12
110
5/32
183
DQS12/10-110
0.3–3 m (std)
10
14
130
5/32
203
DQS14/10-130
0.3–3 m (std)
10
16
150
5/32
223
DQS16/10-150
0.3–3 m (std)
10
18
170
5/32
243
DQS18/10-170
0.3–3 m (std)
10
20
190
5/32
263
DQS20/10-190
0.3–3 m (std)
10
22
210
5/32
283
DQS22/10-210
0.3–3 m (std)
10
24
230
5/32
303
DQS24/10-230
0.3–3 m (std)
10
26
250
5/32
323
DQS26/10-250
0.3–3 m (std)
10
28
270
5/32
343
DQS28/10-270
0.3–3 m (std)
10
30
290
5/32
363
DQS30/10-290
0.3–3 m (std)
10
32
310
5/32
383
DQS32/10-310
0.3–3 m (std)
Extended ranges 0.3–6/10/15/25/30/40 m available by code (A..H). Keep model format similar to catalog rows (e.g., DQS06/10-50).
Typical Applications
Mechanical / pneumatic / hydraulic power presses: point-of-operation (die opening) hand guarding; 10–25 mm pitch for finger and palm protection, ≤10 ms response suits short stopping-time systems.
Safety retrofit of older presses: external DQSW/DQSS controller with dry-contact relay output adds guarding without redesigning the original control panel.
Shears, riveting machines and similar vertical closing-hazard machinery: same point-hazard guarding principle.
Manual load/unload stations on stamping lines: 30–80 mm pitch for hand-arm or body presence at the opening.
General machinery: integrate with a safety relay/PLC for safe stop, interlock and EDM monitoring.
Safety distance calculation method (ISO 13855): S = K × T + C, where T is machine stopping time plus the curtain response time. Method reference only — no certification to this standard is claimed.
Frequently Asked Questions
Is the DQS a Type 4 safety light curtain?
Yes — the DQS is rated Type 4, the ESPE category commonly required for point-of-operation guarding on power presses. It is supplied as a light curtain plus a dedicated DQSW/DQSN/DQSS/DQSP controller with dual relay dry-contact outputs, and selected controllers offer EDM. For any specific performance-level or third-party certificate requirement, request the current certificates from the factory and validate the complete safety function against your machine's risk assessment.
Which resolution should I pick — 14 mm finger or larger?
Choose by the body part you must detect. 10/14 mm gives finger protection for close press and fixture guarding; 20/25 mm covers hand/palm access openings; 30/40/80 mm suits hand-arm or whole-body presence and aisle guarding. Protective height follows H = (n − 1) × K, where K is the resolution and n the beam count.
How do I calculate the safety mounting distance for the DQS?
Use ISO 13855: S = K × T + C. K is the approach speed constant (2000 mm/s for hand approach), T is the total stopping time of the machine plus the curtain's ≤10 ms response, and C is an intrusion factor based on the 14 mm or coarser resolution. The fast ≤10 ms response helps keep the required safety distance short.
Can the DQS replace an Omron, SICK or Keyence press light curtain?
In most cases yes. The DQS offers comparable Type 4 protection, 10–80 mm beam pitches, 0.3–3 m standard range (order-code options up to 40 m), ≤10 ms response and IP65, with NPN/PNP options and dual relay dry-contact controller outputs rated AC 250 V/5 A or DC 30 V/5 A. Match the protective height, resolution and output type to the unit being replaced and confirm wiring with the controller datasheet.
What enclosure protection does the DQS provide?
The DQS housing is rated IP65 — dust-tight and protected against water jets — which suits the oil mist and metal dust of a stamping shop, and the body cross-section is approximately 35 × 51 mm so it takes little room alongside the press bed. Housing material, operating temperature range and detection-accuracy figures are not published in the current factory data; contact the factory if your specification requires them.
