24 V AC/DC Supply
The SIRIUS 3TK2821-1CB30 safety relay is designed for a 24 V AC/DC control supply.
SIEMENS 3TK2821-1CB30 Safety Relay 24V AC/DC 3NO 1NC
Available in stock (400)
Regular price
$78.98
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Technical Specifications
| Brand | SIEMENS |
| Model Number | 3TK2821-1CB30 |
| Product Category | Safety Relay |
| Product Family | SIRIUS 3TK28 |
| Rated Control Supply Voltage | 24 V AC/DC |
| Terminal Type | Screw-Type |
| Width | 22.5 mm |
| Safety Output Circuits | 3 NO |
| Signaling Circuit | 1 NC |
| Output Terminals | 13/14, 23/24, 33/34 |
| Signaling Terminals | 41/42 |
| Reset / Feedback Circuit | Y1/Y2 |
Key Features
3 NO Safety Outputs
Three normally open output circuits are provided at terminals 13/14, 23/24 and 33/34.
1 NC Signaling Circuit
A normally closed signaling circuit is provided at terminals 41/42.
Screw-Type Terminals
This 3TK2821 configuration uses screw-type terminals for electrical connections.
22.5 mm Device Width
The safety relay uses a 22.5 mm wide housing format for control cabinet applications.
Reset and Feedback Circuit
Terminals Y1/Y2 are documented for reset button and feedback circuit functions.
Applications
- Industrial safety circuits
- Machine safety control systems
- Safety-related relay circuits
- Control cabinet safety circuits
- Safety contact expansion
- Industrial machinery safety functions
Purchase Information
We support online purchase of the SIEMENS 3TK2821-1CB30 Safety Relay. If you need to make bulk purchases and inquire about other products, please contact our team to inform us of your purchase requirements. We will provide you with information such as quantity quotations, delivery dates, and transportation methods.
Frequently Asked Questions
What is SIEMENS 3TK2821-1CB30?
SIEMENS 3TK2821-1CB30 is a SIRIUS 3TK28 safety relay with relay output circuits.
What control supply voltage does 3TK2821-1CB30 use?
The documented control supply voltage is 24 V AC/DC.
What terminal type does 3TK2821-1CB30 use?
This article number uses screw-type terminals.
How many normally open output circuits are provided?
Three normally open output circuits are provided at terminals 13/14, 23/24 and 33/34.
Does 3TK2821-1CB30 provide a normally closed signaling circuit?
Yes. A normally closed signaling circuit is provided at terminals 41/42.
What is the width of 3TK2821-1CB30?
The documented device width is 22.5 mm.
What are terminals Y1/Y2 used for?
Siemens documentation identifies Y1/Y2 for reset button and feedback circuit functions.
Can 3TK2821 be used for contact expansion?
Siemens operating documentation includes the 3TK2821 in a contact extension configuration. The complete safety circuit requirements should be checked before use.
What applications can 3TK2821-1CB30 be considered for?
It can be considered for industrial safety relay circuits and contact extension functions after the safety requirements and circuit design have been checked.
What should be checked before ordering 3TK2821-1CB30?
Check the complete model number, 24 V AC/DC supply requirement, screw-terminal configuration, required output contacts and existing safety circuit requirements before ordering.
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