Siemens 3RT6016-1BB42 Industrial Control Unit with Double Auxiliary 24VDC 9A 3NO

The Siemens 3RT6016-1BB42 industrial control unit stands as a robust solution for demanding electrical applications, offering superior reliability and performance. This device is engineered with double auxiliary contacts and operates on a 24VDC power supply, managing currents up to 9A with three normally open (NO) contacts. Its compact design, combined with Siemens' renowned quality, makes it an ideal component for control and switching operations in various industrial settings. Key advantages include its energy efficiency, high switching capacity, and straightforward integration into existing control systems.

Product Specifications

| Feature                 | Specification                       |

| :---------------------- | :---------------------------------- |

| Product Type            | Industrial Control Unit             |

| Siemens Model           | 3RT6016-1BB42                       |

| Auxiliary Contacts      | Double, 3 Normally Open (NO)        |

| Control Voltage         | 24VDC                               |

| Rated Operational Current | 9A                                  |

| Enclosure Type          | Not specified, but typically IP20 |

| Mounting                | DIN rail or screw mounting          |

| Terminal Type           | Screw terminals                     |

| Ambient Operating Temp. | -25 to +60 °C                       |

Core Features & Market Positioning

The Siemens 3RT6016-1BB42 distinguishes itself through its high switching capacity and double auxiliary contacts, providing enhanced control and monitoring capabilities. This unit is positioned as a dependable component for applications requiring precise and reliable power control within automated industrial processes. Its 24VDC operation aligns with common control voltage standards in machinery and plant engineering, simplifying power distribution. The inclusion of three NO contacts offers flexibility for interlocking or signaling circuits. Siemens' reputation for quality and durability ensures a long service life, reducing total cost of ownership for end-users compared to less robust alternatives.

Key Application Scenarios

This industrial control unit finds extensive application in motor control circuits, particularly for small to medium-sized loads where reliable switching is paramount. It is frequently employed in automated manufacturing lines for controlling conveyors, pumps, fans, and other auxiliary equipment. The 24VDC control voltage makes it suitable for integration into PLC-driven systems and safety circuits, ensuring compatibility with modern automation architectures. Industries such as food and beverage processing, automotive manufacturing, and building automation commonly specify components like the 3RT6016-1BB42 for their robust performance and ease of integration.

Practical System Integration Guidance

Integrating the Siemens 3RT6016-1BB42 into a control system is typically a straightforward process. Ensure the control circuit is de-energized before making any connections. The unit is designed for DIN rail mounting, allowing for quick and secure installation within control cabinets. Power connections for the 24VDC coil should be made to the designated terminals, respecting polarity. The three NO auxiliary contacts can be wired into control logic, interlocking circuits, or signaling systems as required. Proper wire sizing and termination are critical for reliable operation and adherence to safety standards. Consult the product manual for specific wiring diagrams and terminal designations.

Operation and Risk Mitigation

Safe operation of the Siemens 3RT6016-1BB42 necessitates adherence to electrical safety regulations and proper installation practices. Ensure that the current rating of 9A is not exceeded in the application. Overloading can lead to premature failure and potential hazards. The auxiliary contacts should be used within their specified switching capacity and voltage limits. In case of malfunction, visual inspection for signs of overheating or physical damage is recommended. For troubleshooting, verify control voltage supply and ensure all connections are secure. While specific fault codes are not typically associated with this type of relay, monitoring system alarms from connected PLCs or protective devices is crucial.

Scalability & Long-Term Value

The Siemens 3RT6016-1BB42 offers excellent long-term value due to its robust construction and compatibility with broader Siemens automation ecosystems. While this specific unit is a discrete component, its integration into a system designed with scalability in mind ensures future flexibility. It can be readily incorporated into larger control panels or upgraded as part of a system modernization effort. For enhanced IIoT capabilities, integrating this unit within a networked control architecture, managed by Siemens PLCs or industrial PCs, allows for remote monitoring, diagnostics, and data acquisition, contributing to predictive maintenance strategies and overall plant efficiency.

Frequently Asked Questions

What is the primary function of the Siemens 3RT6016-1BB42?

This unit acts as a remote-controlled switch for electrical circuits. It allows a low-voltage signal to control a higher current load.

It's commonly used to switch power to motors or other machinery in industrial automation. The device ensures safe isolation between the control and power circuits.

Its robust design ensures reliable operation even in demanding industrial environments. This makes it suitable for critical applications.

How do I wire the Siemens 3RT6016-1BB42 correctly?

Connect the 24VDC control voltage to the coil terminals, observing polarity. Wire the power circuit through the main NO contacts.

Utilize the double auxiliary contacts for control logic, interlocks, or status feedback to a PLC. Ensure proper wire gauge and secure connections.

Always de-energize the circuit before wiring and refer to the specific wiring diagram in the product manual.

What are the key technical specifications of the 3RT6016-1BB42?

It features a 24VDC coil voltage and a 9A operational current rating. The unit has three normally open (NO) auxiliary contacts.

This configuration provides flexibility for controlling loads and signaling. It is designed for industrial use with a wide temperature range.

The robust construction ensures durability and a long service life in demanding applications.

Can the Siemens 3RT6016-1BB42 be used in safety-critical applications?

Yes, when integrated correctly into a certified safety system. Its reliable switching characteristics support safety functions.

Always ensure compliance with relevant safety standards (e.g., EN ISO 13849). Proper risk assessment is crucial.

The auxiliary contacts can provide feedback on the switching state for monitoring.

What type of load can the 3RT6016-1BB42 control?

It is suitable for controlling resistive and inductive loads up to 9A. This includes small motors, heaters, and lighting.

Ensure the inrush current of the load is considered for accurate selection. Consult the datasheet for detailed load compatibility.

The three NO contacts offer versatility for various switching tasks within the specified current limits.

Is this unit compatible with Siemens S7 PLCs?

Yes, it is designed to be compatible with Siemens S7 PLCs and other automation systems. The 24VDC control voltage is standard.

The auxiliary contacts can easily be wired to PLC digital inputs for status monitoring. This allows seamless integration into automation logic.

It is a common component choice for applications managed by Siemens controllers.

What is the environmental operating range for this device?

The Siemens 3RT6016-1BB42 typically operates within an ambient temperature range of -25°C to +60°C. Ensure adequate ventilation.

This wide range makes it suitable for diverse industrial environments, including those with temperature fluctuations.

Avoid locations with excessive humidity, dust, or corrosive substances unless appropriately protected.

How does the double auxiliary contact feature benefit users?

It provides two independent sets of NO contacts for parallel signaling or interlocking. This enhances control flexibility and redundancy.

One contact can signal the on-state to a PLC, while another can be used for mechanical or electrical interlocking with other components.

This feature simplifies complex control schemes and reduces the need for additional components.

What happens if the 3RT6016-1BB42 is overloaded?

Overloading can cause excessive heat, damage to the internal contacts, and premature failure of the unit. It can also pose a fire risk.

Always ensure the connected load does not exceed the specified 9A rating. Use appropriate circuit protection devices.

If suspected overload has occurred, inspect the unit for signs of damage before re-energization.

Where can I find the official datasheet for the Siemens 3RT6016-1BB42?

You can typically find the official datasheet on the Siemens Industry Online Support (SIOS) portal. Search using the product number.

Alternatively, many authorized Siemens distributors also provide access to technical documentation and datasheets.

The datasheet contains comprehensive technical details, dimensions, and application notes.