Narrow machine frames
Slots into a 32 × 20 mm frame opening without a redesign of the guarding.
Safety Light Curtain · Slim Profile
LE-E Series Safety Light Curtain (Slim Profile)
A slim-profile 32 × 20 mm light curtain for machine frames where mounting space is scarce. Standard protective heights run from 70 mm to 2992 mm with 4–292 b
Model LE-E Series · Brand LE Raun · Category: Safety Light Curtains
Sectional size32 × 20 mm
Protective height70–2992 mm
Detection distance0.01–3 m / 7 m
Protection levelIP65 / IP67
Overview
The LE-E Series is the slim-profile model: a 32 × 20 mm section that still carries the full optical range — 4–292 beams, 70–2992 mm protective height, 10/20/30/40 mm beam pitch.It is the model to reach for when the machine frame offers little room but the opening still has to be guarded to full height. Supply is 10–30 VDC, output is NPN, PNP or relay, synchronization can be optical or line-based, and the response time is ≤10 ms.
Application scenarios
Semiconductor and SMT equipment
Full-height protection where the machine front is only a few centimetres deep.
Vertical form-fill-seal machines
Guards the jaw area of a packaging machine with a slim profile.
Labelling and packaging machines
Fits between existing guards and the operator position.
Test and inspection stations
Keeps the working area visible while the opening is guarded.
Industries
- Electronics
- Semiconductor
- Packaging
- Medical
Technical specifications
| Model | LE-E Series |
|---|---|
| Sectional size | 32 × 20 mm |
| Beam number | 4–292 beams (standard) |
| Protective height | 70–2992 mm (standard) |
| Detection distance | 0.01–3 m / 0.01–7 m |
| Beam pitch | 10 / 20 / 30 / 40 mm |
| Supply voltage | 10–30 VDC |
| Signal output | NPN / PNP / Relay (optional) |
| Sync type | Optical / line synchronization (optional) |
| Response time | ≤10 ms |
| Protection level | IP65 / IP67 (optional) |
| Light curtain form | Through-beam type |
| Product application | All kinds of automation equipment, jig equipment, packaging machines, food machinery, 3C semiconductor equipment, photovoltaic equipment, lithium equipment, new energy equipment, medical equipment. |
| Ambient light immunity | Incandescent ≤1000 lux, sunlight ≤10000 lux |
| Circuit protection | Reverse polarity, output short-circuit |
| Power consumption | 3–8 W |
| Operating temperature | −25 to +70 °C operating, −40 to +80 °C storage |
| Max load current | 100 mA (OSSD) |
Dimensions
| Item | Value |
|---|---|
| Beam pitch | 10 / 20 / 30 / 40 mm |
| Effective height | beam count × pitch − pitch |
| Dead bands | 10 mm pitch 34 / 17 · 20 mm 29 / 22 · 30 mm 24 / 27 · 40 mm 24 / 32 mm |
| Mounting | 2 × Ø4.5 through holes on the body; M12 connector |
The 20 mm depth is what lets it drop into a slim frame opening; the dead bands still grow with pitch, so a 40 mm pitch version loses 56 mm of body to the end caps.
Wiring & output
| Lead | Colour |
|---|---|
| 2 | Blue |
| 3 | Black |
| 4 | White |
| 5 | Shield / drain |
How to specify
- 01
Pick the detection capability
Finger protection is Φ15 mm with a 10 mm beam pitch; hand protection Φ25 mm at 20 mm; arm and body detection Φ35 mm at 30 mm; whole-body detection Φ45 mm at 40 mm. The finer the pitch, the closer the operator may stand to the hazard.
- 02
Check how far the hazard is
Where the operator cannot reach the danger zone before the curtain responds, a coarser pitch is acceptable. Where the reach-over distance is short, step down one pitch class — this is the single decision that most often changes the model.
- 03
Choose the profile
30 × 30 mm general-purpose, 35 × 40 mm long range, 32 × 20 mm front slim, 25 × 12 mm front ultra-slim, 10 × 22 mm side ultra-slim, 28 × 28 mm no-blind-zone. The profile is set by the space around the opening, not by the electrical specification.
- 04
Set the protective height
Beam count N and pitch define the effective height: B = N × pitch − pitch. Overall housing length A = B + D + E, where D and E are the lower and upper dead zones including the end caps. Choose the next size up rather than leaving part of the opening unguarded.
- 05
Choose output, sync and connection
NPN or PNP, normally-open or normally-closed, in four combinations. Optical synchronisation needs no link wire (5-wire); line synchronisation is immune to cross-talk between adjacent curtains (7-wire). Cable gland or M12 connector at order.
- 06
Confirm the working distance
Standard series align over 0.1–8 m; the long-range series reaches 25–30 m. Check the emitter/receiver pairing table before ordering a mixed set — not every series can be cross-paired.
Why this series
32 × 20 mm profile
The narrowest full-height option in the range — it tucks into frame slots and behind guards without forcing a redesign of the machine.
Full 2992 mm stroke
Protective heights reach 2992 mm with up to 292 beams, so slim does not mean short.
Concealed mounting
The slim section leaves more of the machine visible and reduces the risk of the curtain being knocked or used as a step.
Questions
Where does the slim profile help most?
On machines where a 30 × 30 mm or 35 × 40 mm section will not fit — narrow frame slots, recessed openings, or cells where the curtain must sit behind an existing guard.
Is the beam performance the same as the LE-B?
Beam count (4–292), pitch (10/20/30/40 mm), response time (≤10 ms) and protection level (IP65, IP67 optional) match the general-type series. The difference is the 32 × 20 mm housing and a maximum protective height of 2992 mm.
Can it be mounted vertically and horizontally?
The through-beam arrangement works in either orientation; brackets are chosen to suit the frame.
Related products
Need a quotation for LE-E Series?
Send your application details or the guard opening dimensions and we will specify the right model and configuration for your machine.