ELPRO 905U-L-T Plc Wireless Radio Module Set 905U-L-R I/o

( Brand: Elpro ), ( Manufacturer Part Number: 905U-L-T ), ( Part Type: Radio Module )

Review ELPRO And Plc Wireless Radio I/o Module Set

The **ELPRO 905U-L-T and 905U-L-R PLC Wireless Radio I/O Module Set** represents a cutting-edge solution for industrial automation, enabling seamless wireless communication between programmable logic controllers (PLCs) and field devices across challenging environments. Designed for robust and reliable operation, this set consists of two complementary modules the **905U-L-T (Transmitter)** and **905U-L-R (Receiver)** which operate in the **902 928 MHz ISM band**, ensuring compliance with global regulatory standards while delivering high-performance wireless connectivity. Ideal for applications where wired connections are impractical or costly, such as in harsh industrial settings, remote monitoring systems, or distributed automation networks, this module set leverages **sub-GHz frequency technology** to minimize interference and maximize range, often exceeding **1,000 meters (3,280 feet) in open environments** under optimal conditions. The **905U-L-T** serves as the master transmitter, capable of broadcasting digital signals, analog inputs, and discrete outputs wirelessly, while the **905U-L-R** functions as the receiver, translating these signals into usable data for integration with PLCs, RTUs, or other control systems. Both modules are engineered with **industrial-grade durability**, featuring **IP67-rated enclosures** to withstand extreme temperatures, moisture, dust, and mechanical stress, making them suitable for outdoor installations or environments exposed to harsh elements. The wireless communication protocol is optimized for **low latency and high reliability**, ensuring real-time data transmission critical for process control, energy management, and predictive maintenance applications. Additionally, the modules support **multiple communication protocols**, including **Modbus RTU, ASCII, and proprietary formats**, allowing for flexible integration with existing automation infrastructure. Security is a priority, as the system incorporates **encryption and authentication mechanisms** to prevent unauthorized access and ensure data integrity, which is essential for applications in critical infrastructure or sensitive industrial processes. Whether deployed in **oil and gas facilities, water treatment plants, renewable energy systems, or large-scale manufacturing operations**, this wireless I/O module set provides a scalable and future-proof solution for expanding automation networks without the constraints of physical wiring. With its **plug-and-play compatibility**, **low power consumption**, and **long-range capabilities**, the ELPRO 905U-L-T and 905U-L-R set empowers engineers and technicians to deploy wireless communication solutions efficiently, reducing installation time, maintenance costs, and operational complexity while enhancing overall system performance and flexibility.

### **Pros and Cons of buying a ELPRO 905U-L-T and 905U-L-R PLC Wireless Radio I/O Module Set**

#### **Pros**

1. **Wireless Communication Capability**

The ELPRO 905U-L series modules enable wireless communication over Power Line Carrier (PLC) technology, eliminating the need for wired connections between devices. This is particularly useful in environments where running cables is impractical or costly, such as retrofitting existing installations or applications with limited access to wiring infrastructure.

2. **Long-Range Wireless Coverage**

The 905 MHz frequency band used by these modules provides relatively long-range wireless communication (typically up to 100 meters or more, depending on environmental conditions). This makes them suitable for applications where devices need to communicate across larger distances without physical wiring.

3. **Easy Installation and Retrofitting**

Since these modules operate over existing electrical wiring, they can be easily integrated into new or existing systems without major structural changes. This reduces installation time and labor costs compared to wired solutions.

4. **Scalability**

The wireless nature of these modules allows for easy expansion of the network. Additional modules can be added without the need for complex wiring or network reconfiguration, making it ideal for growing systems or temporary setups.

5. **Versatility in Applications**

- Remote monitoring and control systems

- Building automation (e.g., lighting, HVAC, security)

- Agricultural automation (e.g., irrigation, livestock monitoring)

- Home automation and smart home systems

- Data acquisition and telemetry systems

6. **Compatibility with Existing Systems**

These modules are designed to work with ELPRO s other PLC devices, ensuring seamless integration with existing ELPRO-based systems. They can also interface with other PLC or wireless systems through appropriate gateways or protocols.

7. **Low Power Consumption**

Compared to some other wireless technologies, PLC modules like these typically consume relatively low power, which can extend battery life in portable or remote applications (if battery-powered devices are used in conjunction).

8. **Cost-Effective for Short to Medium Distances**

For applications where wired solutions would be expensive or impractical, these wireless modules can offer a cost-effective alternative. The absence of wiring materials and installation labor can lead to significant savings.

---

#### **Cons**

1. **Limited Range in Complex Environments**

While the 905 MHz frequency can cover long distances in ideal conditions, the range can be significantly reduced in environments with electrical noise, thick walls, or heavy interference from other electronic devices. This may require additional repeaters or relays to maintain reliable communication over longer distances.

2. **Susceptibility to Electrical Noise and Interference**

PLC technology relies on electrical wiring as a communication medium, which means it can be affected by electrical noise, voltage fluctuations, or poor wiring conditions. This can lead to packet loss, dropped connections, or unreliable data transmission.

3. **Security Concerns**

Wireless communication, including PLC-based wireless, can be vulnerable to unauthorized access or eavesdropping if proper security measures (e.g., encryption, authentication) are not implemented. While ELPRO modules likely include some level of security, users must ensure their setup is protected against potential cyber threats.

4. **Latency Issues**

PLC wireless communication can sometimes suffer from higher latency compared to wired or other wireless technologies (e.g., Wi-Fi, Bluetooth, or cellular). This may not be an issue for simple control applications but could be problematic for real-time systems requiring low-latency responses.

5. **Limited Data Throughput**

The data transfer rates of PLC wireless modules are generally lower compared to modern wireless standards like Wi-Fi or Zigbee. This may limit their suitability for high-bandwidth applications such as video streaming or large file transfers.

6. **Dependence on Electrical Infrastructure**

The modules require access to a functional electrical wiring system to operate. In environments with poor or unreliable electrical wiring (e.g., old buildings, areas with frequent power outages), the performance of these modules may be compromised.

7. **Potential for Signal Collision**

In networks with multiple PLC devices operating on the same frequency, signal collisions can occur, leading to data corruption or dropped packets. This requires careful network planning and potentially the use of frequency-hopping or other techniques to mitigate collisions.

8. **Limited Support for Advanced Protocols**

While these modules support basic wireless communication, they may not natively support advanced or proprietary protocols that are commonly used in modern IoT or industrial systems. Additional gateways or converters may be needed to integrate them with other systems.

9. **Regulatory and Frequency Restrictions**

The 905 MHz frequency band may be subject to regulatory restrictions in some regions, requiring compliance with local communication laws. Users must ensure that the modules are approved for use in their specific country or region.

10. **Vendor Lock-In**

ELPRO s proprietary technology may limit interoperability with third-party devices. If users need to integrate these modules with non-ELPRO systems, they may face compatibility challenges or require additional adapters.

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### **Conclusion**

The ELPRO 905U-L-T and 905U-L-R PLC wireless radio I/O module set offers a practical wireless solution for applications where wired communication is impractical or costly. Its long-range wireless capability, ease of installation, and scalability make it a strong choice for retrofitting existing systems or deploying wireless networks in environments with limited access to wiring. However, its performance is highly dependent on the quality of the electrical infrastructure, and it may struggle in electrically noisy environments or where high data throughput or low latency are required.

For users with relatively simple control or monitoring needs, good electrical wiring, and minimal interference, these modules can be an excellent and cost-effective option. However, for applications requiring high reliability, large-scale networks, or advanced communication protocols, additional planning (such as using repeaters, implementing robust security measures, or integrating with wired backups) may be necessary.

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### **Recommendation**

- You are working in an environment where wired connections are difficult or expensive to implement.

- Your application requires wireless communication over moderate distances (up to 100 meters in ideal conditions).

- You need a scalable, easy-to-install solution for control or monitoring tasks.

- The electrical wiring in your environment is clean and free from excessive noise.

- You are already using or plan to use other ELPRO PLC devices, ensuring compatibility.

- Your application requires high data throughput, low latency, or real-time performance.

- The environment has significant electrical noise, poor wiring, or frequent power fluctuations.

- You need to integrate with non-ELPRO systems that do not support PLC wireless communication.

- Security is a critical concern, and you require advanced encryption or authentication protocols.

- You are operating in a region with strict frequency regulations that may restrict 905 MHz usage.

For best results, thoroughly assess your specific use case, test the modules in your environment, and consider supplementing them with wired backups or additional repeaters if needed. If you are unsure about compatibility or performance, consulting with ELPRO s technical support or a certified integrator can help ensure a successful implementation.

Details:

ELPRO Technologies 905U-L-T 905U-L-R Wireless Radio i/o set, Transmitter Receiver io, 24v Input, Din Rail Mount Used Location 221-027.

part #: 905ul prices

• $140.00-$1499.99

specifications sensoindustria:

• brand: Elpro
• mpn: 905u-l-t
• part type: Radio Module

offer sensoindustria:

• quantity: 1
• best offers: True
• availability: In Stock
• sold: 0
• started: May 24, 2026
• options: Ship-to-home

seller sensoindustria:

• # reviews: 116
• city: Alameda, California
• rating: 100.0%

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general sensoindustria:

• condition: Used
• PLCs HMIs > PLC Peripheral Modules > PLC Input Output Modules

returns sensoindustria:

• policy: Returns Accepted
• method: Money back
• time: 14 Days
• paid by: Buyer

shipping sensoindustria:

• cost: $0.00
• type: Calculated
• carrier: USPS
• class: Standard
• transit: 4-8 Days
• service: USPS Ground Advantage

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