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Siemens 3SK1 24V DC Safety Relay with 4 Safety Contacts 3SK1121-1CB42
Specifications
| Country of Origin | Germany |
|---|---|
| Brand | Siemens |
| Height | 122mm |
| Length | 100mm |
| Model | 3SK1121-1CB42 |
| IP Rating | IP20 |
| Width | 22.5mm |
| Series | 3SK1 |
| Maximum Operating Temperature | 60°C |
| Minimum Operating Temperature | -25°C |
| Safety Category | 4 |
| Terminal type | Screw |
| Standards/Approvals | RoHS |
| Coil Voltage | 24V dc |
| Safety Contacts | 4 |
Key Features
- Equipped with 4 safety contacts for instantaneous and time-delayed enabling circuits.
- Compact dimensions measuring 122mm height, 100mm length, and 22.5mm width.
- Simple screw terminal connections ensure secure and quick installation.
- Integrated potentiometer allows setting time delays from 0.5 to 30 seconds to prevent nuisance activations.
- Designed with an IP20 rating for safe operation in controlled industrial environments.
- Supports a wide operating temperature range from -25°C to 60°C.
- Complies with RoHS standards, ensuring environmental safety.
- Suitable for use with electromechanical switches and contact-free protection like light barriers and laser scanners.
Product Description
Siemens 3SK1121-1CB42 Safety Relay operates at 24V DC and features 4 safety contacts designed for industrial automation and safety applications. This device from the SIRIUS series is compact, with dimensions of 122mm (H) x 100mm (L) x 22.5mm (W), enabling installation in limited space environments.
The relay provides enhanced workplace safety by monitoring industrial processes and quickly responding to dangerous conditions. It supports key safety functions such as emergency stops and protective door monitoring without requiring programming.
The integrated potentiometer allows users to set precise time delays ranging from 0.5 to 30 seconds, helping to eliminate false triggers and improve system reliability. Screw terminal connections facilitate straightforward and secure wiring.
The 4 safety contacts include two instantaneous enabling circuits and two time-delayed circuits for flexible safety configurations. The device’s IP20 rating ensures protection against solid foreign objects while requiring appropriate enclosure for industrial environments.
Operating temperature range from -25°C up to 60°C makes it suitable for diverse ambient conditions. The device conforms to the RoHS directive, reflecting its environmentally responsible design.
Its robust design suits integration with electromechanical safety switches and contact-free protection devices like light barriers and laser scanners. Classified under safety category 4, it offers a high integrity level for critical safety functions.
Originating from Germany, the Siemens 3SK1121-1CB42 safety relay is ideal for applications in industrial automation, manufacturing plants, HVAC systems, and laboratories requiring reliable safety monitoring.
Equipped with 4 safety contacts for instantaneous and time-delayed enabling. Compact size ensures fitment in tight spaces. Screw terminals provide secure and easy wiring. Adjustable potentiometer for time delay settings.
IP20 rated for protection in controlled environments. Explore more industrial Safety Relays and automation components within the Electronics & Electricals category at EnvMart.
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Frequently Asked Questions
The coil voltage of this safety relay is 24V DC.
This model has dimensions of 122mm in height, 100mm in length, and 22.5mm in width.
It is equipped with 4 safety contacts, which include two instantaneous and two time-delayed circuits.
The operating temperature range is from -25°C to 60°C.
This safety relay has an IP20 rating, providing protection against solid foreign objects.
It uses screw terminal connections for secure and quick installation.
This safety relay is classified under safety category 4, indicating a high integrity level for critical safety functions.
The integrated potentiometer allows for setting time delays from 0.5 to 30 seconds, which helps prevent nuisance activations.
Yes, it complies with RoHS standards, ensuring environmental safety.
This model originates from Germany.
It is suitable for applications in industrial automation, manufacturing plants, HVAC systems, and laboratories requiring reliable safety monitoring.
Yes, it is designed to integrate with contact-free protection devices like light barriers and laser scanners.
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