3SK1111-1AB30 Siemens SIRIUS Standard Safety Relay 24V

Product Description / Overview

The Siemens 3SK1111‑1AB30 is a high-performance safety relay from the SIRIUS 3SK1 series, designed for industrial automation.
It monitors safety devices such as emergency stops, protective doors, light barriers, and laser scanners, ensuring immediate shutdown during hazardous conditions.

Moreover, the relay provides three NO enabling contacts for switching safety outputs and one NC signaling contact for diagnostics or feedback.
Its 24 V AC/DC supply and screw terminal connection simplify integration into compact control panels and automation systems.

In addition, the relay is SIL3 and PL e rated, offering the highest level of safety integrity for demanding applications.

Technical Data / Specifications

Product Type: Safety relay basic unit
Series: SIRIUS 3SK1
Contacts: 3 NO enabling + 1 NC signaling
Supply Voltage: 24 V AC/DC
Connection: Screw terminal
Housing Protection: IP20
Rated Insulation Voltage: 300 V
Impulse Withstand Voltage: 4 kV
Operating Temperature: –25 … +60 °C
Storage Temperature: –40 … +80 °C
Relative Humidity: 10 … 95 % (operation)
Installation Altitude: Up to 2000 m
Shock Resistance: 10 g / 11 ms
Vibration Resistance: 5–500 Hz, 0.75 mm (IEC 60068-2-6)
Safety Integrity Level (SIL): SIL3 (IEC 61508)
Performance Level (PL): PL e, Category 4 (EN ISO 13849-1)
Safe Failure Fraction (SFF): 99 %
PFHD: 1.7 × 10⁻⁹ /h (EN 62061)
PFDavg: 1 × 10⁻⁶ (IEC 61508)
Test Interval (T1): 20 years
Overvoltage Category: 3
Pollution Degree: 3
Weight: 0.15 kg
Packaging Dimensions (L × W × H): 109 × 36 × 152 mm

FAQ

What is the supply voltage of the 3SK1111-1AB30?
It operates on 24 V AC/DC supply, suitable for standard industrial control panels.

How many enabling contacts are included?
The relay provides three NO enabling contacts and one NC signaling contact.

Which safety standards does it meet?
It complies with SIL3 (IEC 61508) and PL e (EN ISO 13849-1) standards.

What is the protection class?
The device is IP20 rated and should be installed inside a protected cabinet.

Can it monitor light barriers and protective doors?
Yes, it supports emergency stops, light barriers, protective doors, laser scanners, and magnetically operated switches.