Siemens 6ED1055-1MA00-0BA2 4-point PLC Relay Output Module

The Siemens 6ED1055-1MA00-0BA2 is a robust 4-point PLC relay output module designed for demanding industrial automation tasks. This module offers essential functionality for controlling actuators, motor starters, and other high-power loads within logic control systems. Its key advantages lie in its reliable relay switching capabilities, straightforward integration into Siemens LOGO! and S7-1200 systems, and its compact form factor, making it ideal for space-constrained control cabinets. The core features include four independently controlled relay outputs, a maximum switching capacity of 5A per channel, and a broad operating voltage range, ensuring compatibility with diverse power supplies. Technically, the module boasts a quick response time and a high electrical and mechanical lifespan, crucial for continuous operation in harsh industrial environments.

Product Specifications

| Feature                   | Specification                                   |

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

| Module Type               | Digital Output Module (Relay)                   |

| Number of Outputs         | 4                                               |

| Output Type               | Relay                                           |

| Max. Switching Current    | 5 A per channel                                 |

| Max. Switching Voltage    | 250 VAC / 30 VDC                                |

| Electrical Endurance      | 100,000 switching cycles at rated load          |

| Mechanical Endurance      | 10,000,000 switching cycles                     |

| Operating Temperature     | 0°C to +55°C                                    |

| Dimensions (W x H x D)    | Typically compact for DIN rail mounting         |

| System Compatibility      | Siemens LOGO! and S7-1200 series                |

| Protection Rating         | IP20 (finger-safe)                              |

Core Features & Market Positioning

The Siemens 6ED1055-1MA00-0BA2 distinguishes itself through its direct relay output technology, which provides galvanic isolation and the ability to switch both AC and DC loads, a significant advantage over solid-state outputs in certain applications. This capability makes it highly versatile for interfacing with a wide range of industrial equipment, from small motors to solenoid valves and lighting systems. In the competitive landscape of industrial automation modules, its placement within the Siemens ecosystem offers seamless integration with other Siemens automation components, simplifying system design and reducing potential compatibility issues. The module's robust construction and proven Siemens reliability position it as a dependable choice for engineers seeking long-term performance and minimal downtime. Its focus on essential relay output functionality ensures a cost-effective solution for applications that do not require the advanced features of more complex digital output modules.

Key Application Scenarios

This 4-point PLC relay output module is exceptionally well-suited for a variety of automation tasks across multiple industries. In manufacturing, it can be employed to control conveyor belts, pneumatic actuators, and process pumps, where the switching of higher currents is often necessary. For building automation, it finds use in managing HVAC systems, controlling ventilation fans, and actuating large solenoid valves for water or gas flow. In the food and beverage industry, its ability to switch AC loads makes it suitable for controlling motor starters for processing equipment. Furthermore, it is a common component in standalone machine control, managing the operation of various electromechanical devices based on PLC logic. Users frequently search for solutions to control motor loads and interface with legacy equipment, areas where the 6ED1055-1MA00-0BA2 excels due to its relay switching capabilities.

Practical System Integration Guidance

Integrating the Siemens 6ED1055-1MA00-0BA2 into a control system is designed for efficiency. The module typically mounts on a standard 35mm DIN rail, facilitating easy mechanical installation within an electrical enclosure. Wiring involves connecting the common terminals for each relay bank to the appropriate power source (AC or DC) and then connecting the individual normally open (NO) or normally closed (NC) contacts to the controlled loads. For programming, when used with Siemens LOGO! or S7-1200 PLCs, the module is recognized by its hardware address. Logic is developed within the respective programming software (e.g., LOGO!Soft Comfort or TIA Portal) to assign digital outputs from the PLC program to control the state of each relay channel. Ensuring proper grounding and adhering to the maximum switching current and voltage ratings are critical for safe and reliable operation.

Operation and Risk Mitigation

Operating the Siemens 6ED1055-1MA00-0BA2 requires adherence to electrical safety standards. Users must ensure that the power supply connected to the module is correctly rated and that the loads being switched do not exceed the module's specified 5A per channel limit. Failure to do so can lead to relay contact welding, premature failure, or overheating. It is essential to use appropriate wire gauges for the connected loads to prevent excessive voltage drop or current limitations. Overload conditions are a primary cause of relay failure; therefore, implementing proper load monitoring or using appropriately sized circuit breakers is a key risk mitigation strategy. In case of malfunctions, checking the PLC program logic, verifying wiring integrity, and inspecting the physical condition of the relay contacts are the initial troubleshooting steps.

Scalability & Long-Term Value

The Siemens 6ED1055-1MA00-0BA2 offers good scalability within its intended product families. When used with Siemens LOGO! 8, it can expand the digital output capacity of the base module, allowing for control of more devices. Similarly, in S7-1200 systems, it serves as a cost-effective way to add specific relay output capabilities without needing to upgrade to a larger CPU or a more feature-rich I/O module. Its compatibility with established Siemens platforms ensures that systems built with this module can be maintained and expanded for years to come. The long-term value is further enhanced by its durability and the availability of support and spare parts within the Siemens ecosystem, aligning with the trend towards industrial IoT and digital transformation through reliable foundational automation components.

Frequently Asked Questions

What is the maximum AC voltage the Siemens 6ED1055-1MA00-0BA2 can switch?

The module is capable of switching a maximum AC voltage of 250 Volts. This allows for control of standard industrial AC powered devices.

Ensure the connected load does not exceed this voltage limit for optimal performance. This specification is critical for AC motor control.

How do I wire the Siemens 6ED1055-1MA00-0BA2 relay output module?

Connect the power supply to the common terminals for each relay bank. Then, wire your loads to the individual normally open (NO) or normally closed (NC) contacts.

Always verify wiring diagrams provided by Siemens for precise connections. Follow safety guidelines to prevent electrical hazards.

Ensure proper grounding of the entire system for safe operation.

Can the Siemens 6ED1055-1MA00-0BA2 be used with Siemens S7-1200 PLCs?

Yes, this module is fully compatible with the Siemens S7-1200 PLC series. It integrates seamlessly as an additional I/O module.

This compatibility allows for expanded control capabilities in S7-1200 projects. Refer to TIA Portal for hardware configuration.

It offers a straightforward method to add four relay outputs to your S7-1200 system.

What is the maximum switching current per channel for this module?

Each relay output channel on the 6ED1055-1MA00-0BA2 can handle a maximum current of 5 Amperes. This is suitable for a variety of medium-power industrial loads.

Exceeding this current rating can damage the relay contacts or cause overheating. Consider using external contactors for higher current loads.

Always check your load's current draw against this specification before connecting.

What is the operating temperature range for the Siemens 6ED1055-1MA00-0BA2?

The module operates reliably within an ambient temperature range of 0°C to +55°C. This covers most standard industrial environments.

Avoid installing the module in locations with extreme temperatures or poor ventilation. Such conditions can affect performance and lifespan.

Ensure adequate airflow around the module when installed in a control cabinet.

How many relay outputs does the Siemens 6ED1055-1MA00-0BA2 have?

The module features a total of four individual relay outputs. These outputs can be controlled independently by the PLC.

Each of these four outputs provides the switching capability for your connected devices. This provides flexibility in controlling multiple loads.

The number of outputs makes it ideal for small to medium-sized control applications.

What is the typical application for a 4-point PLC relay output module like this?

These modules are commonly used for controlling devices such as motor starters, solenoid valves, and contactors. They are also suitable for switching AC or DC loads.

Applications range from basic machine control to building automation systems. They provide a robust interface between the PLC and actuators.

Their ability to handle higher currents makes them a choice for directly actuating certain industrial equipment.

What is the electrical endurance of the Siemens 6ED1055-1MA00-0BA2?

The module has an electrical endurance of approximately 100,000 switching cycles at its rated load. This indicates its reliability for frequent switching operations.

This rating is important for applications with high duty cycles. Proper load management can help achieve or exceed this lifespan.

Consider the lifespan of mechanical relays when designing systems with very high switching frequencies.

Does this module provide galvanic isolation?

Yes, the relay outputs inherently provide galvanic isolation between the PLC control circuit and the switched load circuit. This is a key safety and protection feature.

Galvanic isolation prevents electrical noise from the load side from affecting the PLC. It also protects the PLC from voltage spikes on the load side.

This isolation is a significant advantage for applications involving diverse voltage levels or noisy environments.

How does this module differ from a solid-state output module?

Relay outputs, like those on the 6ED1055-1MA00-0BA2, use physical contacts to switch power, offering broad AC/DC compatibility and high isolation. Solid-state outputs use semiconductors, offering faster switching speeds and higher switching frequencies but are typically limited to AC or DC and may have lower current ratings.

Relay modules are generally more robust for inductive loads and offer a simpler, more forgiving interface for mixed voltage types. Solid-state modules are preferred for high-speed digital signals or applications requiring minimal contact bounce.

The choice depends on the specific load requirements, switching speed needs, and the nature of the signals being controlled.