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Siemens 24V dc Safety Relay with 4 Safety Contacts 3SK1121-2CB42
Specifications
| Country of Origin | Germany |
|---|---|
| Brand | Siemens |
| Height | 122mm |
| Length | 100mm |
| Model | 3SK1121-2CB42 |
| IP Rating | IP20 |
| Width | 22.5mm |
| Series | 3SK1 |
| Maximum Operating Temperature | 60°C |
| Minimum Operating Temperature | -25°C |
| Safety Category | 4 |
| Terminal type | Cage Clamp |
| Time Function | with OFF delay |
| Standards/Approvals | RoHS |
| Coil Voltage | 24V dc |
| Safety Contacts | 4 |
Key Features
- Features 4 safety contacts for reliable emergency stop and protective monitoring.
- Uses 24V dc coil voltage ensuring compatibility with industrial control systems.
- Equipped with cage clamp terminals and IP20 protection rating.
- Operates reliably from -25°C to 60°C ambient temperature.
- Includes 4-way DIP switch for function setting and 4 LEDs for status indication.
- Incorporates a set/reset button for loading functions and device resets.
- Supports time-delayed enabling circuits with potentiometer adjustable off delay.
- Safe and expandable using 3ZY12 device connectors for modular input/output extensions.
Product Description
Siemens 3SK1121-2CB42 24V dc Safety Relay is an advanced configurable safety relay designed for reliable monitoring and protection in industrial and automation systems.
This safety relay features 4 safety contacts suitable for emergency stop monitoring, protective door control with electromechanical or solid-state position switches, and contact-free protection devices such as light barriers or laser scanners. The relay’s 24V dc coil voltage ensures compatibility with common industrial control supply voltages.
The device incorporates a 4-way DIP switch for flexible function settings and 4 LED indicators providing clear status and functional display. The set/reset button facilitates easy loading of functional settings and device resets. It includes 2 sensor input channels and supports evaluation of normally open and normally closed contacts via external jumpers.
For flexibility, the 3SK1 series supports modular expansion through 3ZY device connectors allowing both input and output extensions. Time-delayed enabling circuits can be adjusted via a potentiometer, and the relay employs an off-delay time function to suit various control requirements.
Designed to operate reliably in ambient temperatures from -25°C to 60°C, featuring cage clamp terminals and an IP20 rating, this safety relay ensures robust industrial performance. It complies with RoHS standards and is manufactured in Germany to exacting quality controls.
Features 4 safety contacts for emergency monitoring and protection. 24V dc coil voltage with cage clamp terminals and IP20 protection. Supports modular expansion with device connectors for input/output extensions. Includes function setting DIP switch, LED status indicators, and set/reset button.
Adjustable off-delay time function via potentiometer. Operates within a temperature range of -25°C to 60°C for industrial environments. Suitable for emergency stop, protective door, and contact-free protection applications.
Manufactured in Germany with RoHS compliance ensuring quality and safety. This Siemens safety relay is ideal for industrial automation, manufacturing, control panels, and safety system installations requiring reliable safety category 4 components.
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Frequently Asked Questions
The coil voltage of this safety relay is 24V dc, ensuring compatibility with common industrial control supply voltages.
This safety relay operates reliably in ambient temperatures up to 60°C.
It features 4 safety contacts suitable for emergency stop monitoring and protective control applications.
The 3SK1121-2CB42 has an IP20 protection rating, indicating it is protected against solid objects greater than 12mm but not against water.
This model can operate in temperatures ranging from -25°C to 60°C.
It is equipped with cage clamp terminals for secure and reliable connections.
Yes, it supports modular expansion through 3ZY device connectors for both input and output extensions.
The 4-way DIP switch allows for flexible function settings to customize the relay's operation according to specific requirements.
This safety relay complies with safety category 4, suitable for critical safety applications.
The set/reset button facilitates easy loading of functional settings and device resets for operational convenience.
It complies with RoHS standards, ensuring it meets environmental and safety regulations.
The dimensions of the relay are 100mm in length and 22.5mm in width.
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