3TK2821-1CB30 | Siemens Safety Relay
Siemens · HMIs & Displays
Description The Siemens 540-155 is a protective enclosure for terminal equipment controllers, offering secure mounting and environmental shielding in HVAC and building automation systems. Technical Specifications Condition New/Never Used Surplus Brand Siemens Category Safety Systems Part Number 3TK2821-1CB30 Subcategory Safety Relay Series SIRIUS Control Voltage 24 VAC/DC Output Configuration Normally Open (N/O), 1 Normally Closed (N/C) Start Function Automatic or Manual Start selectable Output Type Relay enabling circuits Safety Level Suitable for applications up to SIL 3 / PL e (with proper wiring) Terminal Type Screw terminals Housing Width 22.5 mm Protection Feature Finger-safe terminals Weight 0.247 kgs Information About 3TK2821-1CB30 The Siemens 3TK2821-1CB30 is a compact safety relay from the SIRIUS series, designed for monitoring emergency stop and safety circuits in industrial automation systems. It ensures dependable shutdown of hazardous operations, meeting stringent safety requirements in manufacturing and machine control applications. Key Features: Product Type: Safety relay for emergency stop and safety monitoring Series: SIRIUS Control Voltage: 24 VAC/DC Output Configuration: 3 Normally Open (N/O) enabling outputs, 1 Normally Closed (N/C) feedback output Start Options: Selectable automatic or manual start Output Type: Relay enabling circuits Terminal Type: Screw terminals Housing Width: 22.5 mm (DIN-rail mountable) Safety Certification: SIL 3 (IEC 61508), PL e (ISO 13849-1), Category 4 Protection Features: Finger-safe terminals for enhanced operator safety This safety relay is ideal for use in e-stop circuits, safety door monitoring, and other safety-critical applications in machine and process control. Its compact design, reliable switching performance, and compliance with international safety standards make it a key component in industrial automation systems.
Brand: Siemens · Category: HMIs & Displays
Key features
- Product Type: Safety relay for emergency stop and safety monitoring
- Series: SIRIUS
- Control Voltage: 24 VAC/DC
- Output Configuration: 3 Normally Open (N/O) enabling outputs, 1 Normally Closed (N/C) feedback output
- Start Options: Selectable automatic or manual start
- Output Type: Relay enabling circuits
- Terminal Type: Screw terminals
- Housing Width: 22.5 mm (DIN-rail mountable)
- Safety Certification: SIL 3 (IEC 61508), PL e (ISO 13849-1), Category 4
- Protection Features: Finger-safe terminals for enhanced operator safety
Specifications
| Manufacturer part number | 3TK2821-1CB30 |
|---|---|
| Condition | New/Never Used Surplus |
| Brand | Siemens |
| Category | Safety Systems |
| Part Number | 3TK2821-1CB30 |
| Subcategory | Safety Relay |
| Series | SIRIUS |
| Control Voltage | 24 VAC/DC |
| Output Configuration | Normally Open (N/O), 1 Normally Closed (N/C) |
| Start Function | Automatic or Manual Start selectable |
| Output Type | Relay enabling circuits |
| Safety Level | Suitable for applications up to SIL 3 / PL e (with proper wiring) |
| Terminal Type | Screw terminals |
| Housing Width | 22.5 mm |
| Protection Feature | Finger-safe terminals |
| Weight | 0.247 kgs |
| Product type | Safety Relay |
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