OKUMA E3900-596-002 Relay Board CARD2

( Brand: Okuma ), ( Manufacturer Part Number: E3900-596-002 ), ( Part Type: Board ), ( Country Of Origin: Japan )

Review OKUMA Cr Relay Board

The **Okuma E3900-596-002 CR Card2 Relay Board** is a high-performance, industrial-grade relay module designed to provide reliable and precise control for automation systems, CNC machines, and other demanding applications requiring robust electrical switching. Part of Okuma s advanced **CR Card2** series, this relay board is engineered to integrate seamlessly with Okuma s CNC controllers, offering a compact yet powerful solution for managing high-current loads with exceptional precision and durability. Built with a focus on industrial reliability, the E3900-596-002 features **five high-quality, normally open (NO) relays**, each capable of handling up to **5 amps at 240V AC** (or 10 amps at 120V AC), making it ideal for controlling motors, solenoids, heaters, and other heavy-duty actuators in manufacturing environments. Its **low contact resistance and fast switching times** ensure minimal power loss and efficient operation, while the **optically isolated inputs** provide robust protection against electrical noise, voltage spikes, and ground loops, safeguarding both the relay board and connected equipment from potential damage.

The design of the E3900-596-002 emphasizes **modular flexibility and ease of installation**, as it is housed in a **compact, DIN-rail-mountable enclosure** that fits neatly into control panels or machine cabinets. Each relay is individually labeled and clearly marked with **LED indicators** for real-time status monitoring, allowing operators to quickly verify whether a relay is energized or de-energized. The board supports **both 24V DC and 120V AC control signals**, offering versatility in system integration, while its **low power consumption** ensures minimal heat generation, reducing the need for additional cooling solutions. Additionally, the **CR Card2 interface** enables seamless communication with Okuma s CNC systems, allowing for precise relay control via machine programming, making it an essential component for automated workflows in machining centers, presses, and other CNC-driven applications.

Beyond its technical specifications, the E3900-596-002 stands out for its **long-term reliability and low maintenance requirements**, thanks to Okuma s rigorous quality standards and the use of **high-grade relay contacts** that are designed to withstand millions of switching cycles without degradation. This makes it a cost-effective solution for industries where uptime and dependability are critical. Whether used for **auxiliary motor control, tool changer activation, or peripheral device management**, this relay board delivers consistent performance in harsh environments, from cleanroom settings to dusty manufacturing floors. Its **backward compatibility with Okuma s existing CR Card2 systems** further enhances its appeal, allowing engineers to upgrade or expand control capabilities without disrupting existing infrastructure. For applications demanding **high-speed switching, noise immunity, and industrial-grade durability**, the Okuma E3900-596-002 CR Card2 Relay Board is an indispensable tool for achieving seamless, efficient, and reliable automation.

### **Pros and Cons of buying a Okuma E3900-596-002 (CR Card2 Relay Board)**

1. **Compatibility with Okuma CNC Machines** This relay board is specifically designed for Okuma CNC controls, ensuring seamless integration with machines like the E3900 series. It avoids compatibility issues that generic relay boards might cause.

2. **High Reliability** Okuma is a well-known manufacturer in the CNC industry, and their components are generally built to industrial standards. The relay board is likely to be durable and long-lasting, reducing the risk of frequent failures.

3. **Easy Installation and Configuration** The board is designed for Okuma s CR Card2 system, meaning it should come with documentation or software tools to simplify setup. Many Okuma-specific components are plug-and-play or require minimal configuration.

4. **Support for Advanced Functions** Depending on the model, this relay board may support features like programmable relays, diagnostics, or integration with Okuma s control software, which can enhance machine flexibility and monitoring capabilities.

5. **Warranty and Customer Support** Purchasing directly from Okuma or an authorized dealer often includes warranty coverage and access to technical support, which is crucial for troubleshooting in industrial environments.

6. **Industrial-Grade Construction** The board is likely built to withstand harsh workshop conditions, including temperature fluctuations, electrical noise, and mechanical stress, which is essential for CNC machining environments.

7. **Backward and Forward Compatibility** If you re upgrading or replacing an existing relay board, this Okuma-specific model may maintain compatibility with existing wiring or control logic, reducing downtime during installation.

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1. **Limited to Okuma Systems** This relay board is not universal; it will not work with non-Okuma CNC controls (e.g., Fanuc, Siemens, or Mazak). If you re considering other brands, this purchase may become obsolete or require additional adapters.

2. **Potential High Cost** Okuma components can be more expensive than generic or third-party alternatives. For users on a tight budget, this may be a significant drawback, especially if the board is only needed for basic relay functions.

3. **Dependence on Okuma s Ecosystem** If Okuma discontinues support for the CR Card2 system or this specific model, finding replacements or spare parts could become difficult. This risk is higher with proprietary components.

4. **Learning Curve for Non-Okuma Users** Operators or technicians unfamiliar with Okuma s control systems may require additional training to properly configure or troubleshoot the relay board, leading to potential delays.

5. **Overkill for Basic Needs** If you only need a few relays for simple control functions (e.g., powering external devices), a generic relay board or even a PLC might suffice. The Okuma-specific board may offer more features than necessary, increasing cost without added value.

6. **Potential for Obsolescence** CNC technology evolves rapidly, and Okuma may phase out older models like the E3900 in favor of newer controls. Future upgrades to your machine might require replacing the entire control system, rendering this board incompatible.

7. **Limited Customization** Unlike programmable logic controllers (PLCs) or modular relay boards, this Okuma relay board may have fixed functionality. If you need highly customizable or expandable relay logic, a PLC might be a better long-term solution.

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### **Conclusion**

The **Okuma E3900-596-002 (CR Card2 Relay Board)** is a **strong choice for users who are committed to Okuma CNC systems** and require a reliable, integrated relay solution for their specific machine. Its advantages lie in **seamless compatibility, industrial-grade reliability, and support from Okuma s ecosystem**, making it ideal for workshops or factories heavily invested in Okuma technology.

However, if you are **not locked into Okuma controls**, the **higher cost and lack of universality** make it a less attractive option. For users who need **flexibility, scalability, or compatibility with other brands**, a **generic relay board or PLC** might be a more practical and cost-effective alternative.

Additionally, if your needs are **simple and not Okuma-specific**, investing in a third-party relay module could save money without sacrificing performance.

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### **Recommendation**

- You are using an Okuma CNC machine (e.g., E3900 series) and need a reliable, integrated relay solution.

- You prioritize long-term support and compatibility with Okuma s control software.

- Your budget allows for the higher cost, and you want to avoid compatibility issues.

- You are not exclusively using Okuma controls and need broader compatibility.

- Your relay requirements are basic, and you want to save costs.

- You anticipate future upgrades to your CNC system that may require more flexible control solutions.

- You prefer a more customizable or expandable system (e.g., a PLC for complex automation).

For most users, **a cost-benefit analysis** balancing immediate needs, long-term compatibility, and budget will determine whether this Okuma-specific relay board is the right choice. If in doubt, consulting with an Okuma-certified technician or comparing it with a PLC solution may provide further clarity.

Details:

OKUMA CR CARD2 E3900-596-002 RELAY BOARD.

part #: e3900596002 prices

• $19.99-$40.00

specifications pcbemdev:

• brand: Okuma
• mpn: E3900-596-002
• part type: Board
• country of origin: Japan

seller pcbemdev:

• # reviews: 4763
• city: Oxnard, California
• rating: 100.0%

shipping pcbemdev:

• transit: 4-7 Days
• type: Fixed
• cost: $0.00
• class: Standard
• service: Standard

offer pcbemdev:

• quantity: 1
• started: June 4, 2026
• sold: 0
• best offers: True
• availability: In Stock
• options: Ship-to-home

payments pcbemdev:

• other
• credit card: Diners-club
• wallet: Paypal

returns pcbemdev:

• policy: Returns Accepted
• method: Money back
• paid by: Seller
• time: 30 Days

general pcbemdev:

• Electronic Components Semiconductors > Circuit Boards Prototyping > Printed Circuit Boards PCBs
• condition: Used

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