ESR4-NZ-21 MOELLER Safety Relay

Review MOELLER Safety Relay

The Moeller ESR4-NZ-21 Safety Relay 18815606-L1B is a versatile and reliable safety component designed for various applications in automation and machine safety systems. This safety relay is part of Moeller's ES4 series, known for its advanced features and high performance.

The ESR4-NZ-21 is a 2-channel safety relay with a contact rating of 10A at 250V AC or 30A at 100V DC per channel. It is suitable for use in SIL 2 and PL e applications, making it an excellent choice for safety functions in machinery and equipment. The relay is constructed with high-quality materials and components, ensuring reliable operation even under demanding conditions.

One of the key features of this safety relay is its modular design. It consists of a control unit and two independent output modules, which can be configured as normally open or normally closed contacts. This flexibility allows the ESR4-NZ-21 to be used in a wide range of applications, from simple safety functions to complex safety systems.

The ESR4-NZ-21 also offers advanced diagnostic capabilities. It provides output status indication, fault indication, and self-diagnostics, allowing operators to quickly identify and resolve any issues. The relay is also compatible with Moeller's SafetyBus PRO communication protocol, enabling integration with other safety components and systems.

The safety relay is designed with safety in mind, featuring a robust enclosure that meets IP65 protection rating, ensuring protection against dust and water. It also complies with various international safety standards, including IEC 61508, EN 61850, and EN 62061.

In summary, the Moeller ESR4-NZ-21 Safety Relay 18815606-L1B is a versatile and reliable safety component, well-suited for various applications in automation and machine safety systems. Its advanced features, high performance, and modular design make it a valuable addition to any safety system, while its robust construction and compliance with international safety standards ensure safe and efficient operation.

Pros and Cons of Buying Moeller ESR4-NZ-21 Safety Relay (18815606-L1B)

The Moeller ESR4-NZ-21 Safety Relay (18815606-L1B) is a widely used safety relay in various industries. This relay is known for its reliability, safety, and functionality. However, like any other electrical component, it has its advantages and disadvantages. In this analysis, we will discuss the pros and cons of investing in the Moeller ESR4-NZ-21 Safety Relay.

1. High Safety Standards: The Moeller ESR4-NZ-21 Safety Relay adheres to the highest safety standards, ensuring the protection of people and machines. It complies with international safety norms such as IEC 61800-5-2 and EN 50200, making it a preferred choice for safety-critical applications.

2. Robust Design: The relay's robust design ensures long-lasting performance in harsh environments. It is resistant to vibrations, temperature changes, and humidity, making it an ideal choice for industrial applications.

3. Versatile Functionality: The Moeller ESR4-NZ-21 Safety Relay offers a wide range of functions, including monitoring, control, and safety functions. It can be used in various industries such as automotive, food and beverage, and oil and gas.

4. Easy Configuration: The relay is easy to configure and program using Moeller's EasyConfig software. This software allows users to customize the relay's settings and parameters to meet their specific application requirements.

5. Diagnostic Capabilities: The Moeller ESR4-NZ-21 Safety Relay has built-in diagnostic capabilities that enable users to detect and diagnose faults quickly and easily. This reduces downtime and maintenance costs.

1. Cost: The Moeller ESR4-NZ-21 Safety Relay is a premium product, and its cost may be a significant investment for some users. However, considering its high safety standards, robust design, and versatile functionality, the cost may be justifiable for safety-critical applications.

2. Complexity: The relay's advanced features and capabilities may require a certain level of expertise to configure and program. This may be a challenge for users without extensive electrical engineering knowledge.

3. Limited Input Capability: The Moeller ESR4-NZ-21 Safety Relay has a limited number of input channels, which may not be sufficient for complex systems with numerous safety functions.

4. Size and Weight: The relay is relatively large and heavy compared to some other safety relays on the market. This may be a concern for users with limited space in their control panels.

5. Limited Compatibility: The Moeller ESR4-NZ-21 Safety Relay may not be compatible with all control systems, which may limit its applicability for some users.

The Moeller ESR4-NZ-21 Safety Relay offers several advantages, including high safety standards, robust design, versatile functionality, easy configuration, and diagnostic capabilities. However, it also has some disadvantages, such as cost, complexity, limited input capability, size and weight, and limited compatibility.

The Moeller ESR4-NZ-21 Safety Relay is an excellent choice for users who require a reliable, safe, and versatile safety relay for safety-critical applications. Its advanced features and capabilities make it an ideal solution for industries such as automotive, food and beverage, and oil and gas. However, users should carefully consider its cost, complexity, limited input capability, size and weight, and compatibility before making a purchase decision. If the relay's advantages align with the user's specific application requirements, then it is definitely a worthwhile investment.

Details:

EU ac/dc 24v 50-60hz. This input card was removed from a working production line. Response time. Moeller ESR4-NZ-21 safety relay 18815606-L1B - used, clean and in perfect working condition.

ESR4-NZ-21.

specifications genpurrelays:

• brand: Moeller
• mpn: Esr4-nz-21
• part type: Safety

seller genpurrelays:

• rating: 100.0%
• # reviews: 12
• city: clifton, new jersey

offer genpurrelays:

• in stock #: 5
• availability: in stock
• started: october 26, 2025
• options: ship-to-home
• prices: $98.30–$584.02
• item condition:
  • Used
  • New
  • New – Open box
  • Seller refurbished
• best offers: true
• sold #: 16

returns genpurrelays:

• policy: no returns

general genpurrelays:

• category: Business & Industrial > Electrical Equipment Supplies > General Purpose Relays

shipping genpurrelays:

• carrier: usps
• class: standard
• service: usps ground advantage
• transit: 4-10 days
• type: calculated

payments genpurrelays:

• other
• credit card: diners-club
• wallet: apple-pay