OVERVIEW

Official designation: Siemens 3SK1111-1AB30 (SIRIUS, Safety Relay Basic Unit)

Role/Application: Standard series safety relay for precise control and monitoring in autonomous safety applications. It features 24 Volts AC/DC coil voltage and a contact configuration of three Normally Open enabling circuits and one Normally Closed signaling circuit.

KEY SPECS SUMMARY

Power: 24 V AC/DC Nominal, 50/60 Hz

Interfaces / Ports: Screw Terminals

Indicators: Refer to the latest manufacturer manual.

Operating Temp: Minus 25 degrees C to 60 degrees C

Platform / Compatibility: Suitable for Class B environments

Limit: Category 4, SIL 3, PL e, 4000 V Impulse Voltage

Lifecycle: Since 2012, Active Product Series

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What are the primary contact configuration and overall current rating for this device?

A: It has three Normally Open plus one Normally Closed contact, with a total current maximum of 12 A.

Wiring & Installation:

Q: What are the dimensions and required mounting type for installing the safety relay?

A: The dimensions are 22 point 5 x 100 x 121 point 6 mm, designed for snap-on mounting.

Troubleshooting & Compatibility:

Q: What is the enclosure protection rating and the required degree of pollution for operation?

A: The enclosure protection is IP20 and requires a maximum degree of pollution 3.

Replacement & Upgrades:

Q: Which older Siemens product does the 3SK1111-1AB30 model replace?

A: This model is a direct replacement for the older Siemens part number 3TK2822-1CB30.