SchmersalType 4 Safety Light Curtain Set, 250 mm Protective Height, 30 mm Resolution, 3-10 m Range, PL e / SIL 3

Product Description

What this part is

A Schmersal SLC440-ER-0250-30-01 — a Type 4 safety light curtain with a 250 mm protective field height and 30 mm resolution. It is an active opto-electronic protective device (AOPD): the emitter projects a grid of infrared beams to the receiver, and interrupting any beam switches the safety outputs off. Used to guard an opening on a machine so that a hand or arm entering the field stops the hazardous motion.

Decoding the order code

SLC440 — Schmersal SLC440 safety light curtain series, Type 4.

ER — emitter and receiver, the matched pair that makes up a working curtain.

0250 — protective field height in millimetres: 250 mm.

30 — resolution in millimetres: 30 mm, the hand-detection class.

Published specifications

Type: Type 4 safety light curtain (AOPD) per IEC 61496.

Protective field height: 250 mm.

Resolution: 30 mm (hand protection).

Operating range: 3 m to 10 m at 30 mm resolution.

Safety rating: suitable for safety circuits up to PL e (EN ISO 13849) / SIL 3 (IEC 61508).

Housing: one-piece extruded reinforced profile, approx. 33 mm section.

Enclosure rating: IP65.

Operating temperature: −30 °C to +70 °C.

Origin: Germany (Schmersal nameplate).

What these specs mean in practice

Resolution and protective height are the two numbers that decide whether a curtain is legal for a given guard, and they are not adjustable. 30 mm resolution is the hand-detection class; it will not detect a finger, so a finger-protection application needs a 14 mm curtain instead. The 250 mm field height is short: this is an opening or point-of-operation guard, not a perimeter or access guard. The one-piece extruded housing is the practical selling point on this series, because the sticks stay straight, which is where cheaper curtains generate nuisance trips.

Hazard and rating notes

Rated up to PL e / SIL 3, but the achieved performance level depends on the whole safety function: the curtain, the safety relay or controller, the contactors and the feedback loop.

Quantity and configuration

Sold as one emitter/receiver set — both sticks, as the ER designation denotes. A curtain does not function with only one half.

What is not included

Curtain sticks only. No mounting brackets, swivel mounts or protective columns, no cordsets or connection cables, no safety relay or safety controller, no muting sensors, muting arm or muting kit, no deflecting mirrors, no laser alignment aid, no test rod and no documentation.

Interchange guidance

SLC440-ER-0250-30-01 and SLC440ER02503001 are the same part. Other SLC440 numbers differ in the fields that matter: SLC440-ER-1610-30-01 and SLC440-ER-1850-30-01 are the same 30 mm resolution at 1610 mm and 1850 mm protective heights, and a 14 mm resolution version is a different detection class entirely. SLC440COM is the communicating variant of the series. None of these substitute for one another in a validated safety function without recalculating the safety distance.