3TK2801-0DB4 Siemens

Original price was: $429.00.Current price is: $330.00.

1 in stock



The 3TK2801-0DB4 is a safety relay module manufactured by Siemens, designed primarily for monitoring and controlling safety circuits in industrial automation applications. Here’s a detailed article covering its features, functionality, and applications, spanning approximately 600 words:

Introduction to Siemens 3TK2801-0DB4 Safety Relay Module

Siemens, a global leader in industrial automation and control systems, offers the 3TK2801-0DB4 safety relay module as a robust solution for ensuring the safety of personnel and equipment in industrial environments. This relay module is designed to monitor and control safety circuits, adhering to stringent safety standards to prevent accidents and ensure compliance with regulatory requirements.

Key Features

The 3TK2801-0DB4 safety relay module incorporates several key features that make it suitable for a wide range of safety applications:

  1. Dual-channel Safety Monitoring: It provides dual-channel safety monitoring, allowing redundant inputs for critical safety circuits. This redundancy enhances reliability and ensures continuous operation even if one channel fails.
  2. Reliable Safety Outputs: The module offers safety outputs that are designed to switch off hazardous conditions immediately upon detecting a fault or unsafe operation. This rapid response helps prevent accidents and minimize downtime.
  3. Diagnostic Capabilities: Built-in diagnostics enable the module to continuously monitor its own functionality and the connected safety circuits. This proactive monitoring alerts operators to any potential issues, allowing for timely maintenance and ensuring maximum uptime.
  4. Compact and DIN Rail Mountable: The compact design of the 3TK2801-0DB4 facilitates easy integration into control panels and machinery. It is DIN rail mountable, saving space and simplifying installation in industrial environments.
  5. Wide Operating Voltage Range: With a wide operating voltage range, the module supports flexibility in system design and can be adapted to various voltage standards commonly used in industrial applications.


The primary function of the 3TK2801-0DB4 safety relay module is to monitor safety-critical circuits and ensure that machinery or processes are safely shut down in the event of a fault. It achieves this through advanced monitoring of input signals from safety devices such as emergency stop buttons, safety switches, and light curtains. Upon detecting a hazardous condition or fault in the safety circuit, the module triggers safety outputs to initiate an immediate shutdown, preventing potential harm to personnel or damage to equipment.


The 3TK2801-0DB4 safety relay module finds widespread application across various industrial sectors, including manufacturing, automotive, pharmaceuticals, and food processing. Some typical applications include:

  • Machine Safety Systems: Integrating with machines to ensure safe operation and comply with safety regulations.
  • Robotics: Providing safety interlocks to safeguard operators working alongside industrial robots.
  • Conveyor Systems: Monitoring conveyor safety circuits to prevent accidents during operation.
  • Process Control: Enhancing safety in automated process control systems by monitoring critical safety parameters.


In conclusion, the Siemens 3TK2801-0DB4 safety relay module stands out as a reliable and versatile solution for ensuring safety in industrial automation environments. With its robust design, comprehensive safety features, and ease of integration, it provides peace of mind to operators and engineers tasked with maintaining a safe working environment. By incorporating advanced safety monitoring and rapid response capabilities, this relay module plays a crucial role in minimizing risks and enhancing productivity in modern industrial settings.