ELPRO 905U-2 Wireles Module I/o 13-24V-AC

( Brand: Elpro ), ( Manufacturer Part Number: 905U-2 ), ( Part Type: Module ), ( Reference Sku: 1766483 ), ( Product Condition: Used Excellent )

Review ELPRO Wireles I/o Module 13-24v-ac

The **ELPRO 905U-2 Wireless I/O Module** is a high-performance, versatile, and future-proof solution designed to seamlessly integrate wireless communication into industrial automation, building management systems, and smart infrastructure applications. Operating within the robust **2.4 GHz ISM band**, this module delivers reliable, low-latency data transmission over distances of up to **100 meters (328 feet)** in open environments, making it ideal for distributed control systems, remote monitoring, and wireless sensor networks where wired solutions are impractical or costly. Powered by a flexible **13 24 V AC** input, the 905U-2 ensures compatibility with a wide range of industrial power supplies, while its **24 V DC output** provides clean, regulated power for connected devices, reducing the need for additional conversion circuitry. At its core, the module features **two configurable digital I/O channels**, each capable of operating in input, output, or bidirectional modes, allowing for flexible integration with sensors, actuators, relays, or other control devices. Whether used for monitoring environmental conditions, controlling HVAC systems, managing security access, or enabling predictive maintenance, the 905U-2 s adaptable I/O capabilities ensure seamless interaction with both analog and digital signals.

What truly sets the ELPRO 905U-2 apart is its **proprietary wireless protocol**, which combines **frequency-hopping spread spectrum (FHSS)** with advanced error correction and encryption to deliver **highly secure and interference-resistant communication**. This ensures stable data transmission even in environments with dense RF activity, such as factories, warehouses, or smart buildings. The module s **bidirectional communication** capability allows for real-time two-way data exchange, enabling remote configuration, firmware updates, and diagnostic troubleshooting without physical access to the device. Additionally, its **compact, ruggedized design** with a **metal enclosure** and **IP67 rating** ensures durability in harsh industrial conditions, including exposure to dust, moisture, and temperature fluctuations ranging from **-20 C to 70 C**, making it suitable for outdoor installations and challenging environments. The 905U-2 is also **Plug & Play compatible** with major industrial automation platforms, including **Modbus RTU/TCP, BACnet, and OPC UA**, simplifying integration into existing SCADA, building automation, or IoT ecosystems.

For users seeking **scalability and expandability**, the ELPRO 905U-2 can be easily integrated into larger wireless networks through its **master-slave architecture**, allowing multiple modules to communicate via a central gateway or hub. This modular approach supports the creation of **meshed or star-topology networks**, enhancing reliability and redundancy while minimizing wiring complexity. The module s **low power consumption** typically under **500 mA at 24 V DC** further extends battery life in portable or off-grid applications, making it a cost-effective solution for remote monitoring setups. Whether deployed in **industrial automation, smart metering, agricultural monitoring, or commercial building automation**, the ELPRO 905U-2 delivers a **highly efficient, secure, and future-ready** wireless I/O solution that bridges the gap between legacy systems and modern smart technologies. With its **user-friendly configuration tools**, **robust diagnostics**, and **long-term technical support**, this module empowers engineers and system integrators to deploy **wireless control and monitoring solutions** with confidence, reducing installation time, improving operational efficiency, and enhancing overall system performance.

### **Pros and Cons of buying a ELPRO 905U-2 Wireless I/O Module (13-24V AC)**

1. **Wireless Connectivity** Eliminates the need for cabling, reducing installation complexity and maintenance in hard-to-reach or hazardous areas.

2. **Compact and Modular Design** The small form factor makes it suitable for space-constrained applications, and its modular nature allows easy integration into existing systems.

3. **Wide Voltage Range (13-24V AC)** Provides flexibility in power supply compatibility, making it adaptable to various industrial or commercial setups.

4. **Digital and Analog Input/Output Options** Supports both digital (relay) and analog (voltage/current) signals, offering versatility for different control applications.

5. **Low Power Consumption** Efficient design reduces energy usage, which is beneficial for long-term operational costs.

6. **Compatibility with PLCs and Automation Systems** Works well with programmable logic controllers (PLCs) and other industrial automation platforms, enabling seamless integration.

7. **Reliability in Industrial Environments** Built to withstand typical industrial conditions, including temperature fluctuations and electrical noise.

8. **Easy Installation and Configuration** Designed for straightforward setup, often requiring minimal additional hardware or complex wiring.

9. **Cost-Effective for Wireless Applications** Compared to wired alternatives, it can reduce long-term installation and maintenance costs.

10. **Support for Remote Monitoring** Enables wireless data transmission, useful for remote monitoring and diagnostics in distributed systems.

1. **Limited Range and Interference Sensitivity** Wireless signals can be affected by physical obstructions, electrical interference, or other wireless devices, potentially reducing reliability in crowded environments.

2. **Dependence on Power Supply Stability** While it operates on a wide voltage range, fluctuations outside the 13-24V AC range could cause malfunctions or damage.

3. **Security Concerns** Wireless communication introduces potential vulnerabilities to unauthorized access or signal hijacking, though encryption can mitigate this risk.

4. **Higher Initial Cost Compared to Wired Alternatives** The wireless capability may make it more expensive upfront than traditional wired I/O modules.

5. **Latency in Signal Transmission** Wireless communication can introduce slight delays, which may be critical in high-speed control applications.

6. **Limited Scalability for Large Networks** In very large installations, managing multiple wireless modules may require additional infrastructure (e.g., repeaters or mesh networks).

7. **Dependence on Firmware/Software Updates** Like any electronic device, it may require periodic firmware updates to maintain compatibility and security, which could introduce downtime.

8. **Potential Compatibility Issues** Integration with non-standard or legacy systems might require additional adapters or middleware, adding complexity.

9. **Environmental Limitations** Extreme environments (e.g., high humidity, dust, or electromagnetic interference) may degrade performance unless properly shielded.

10. **Vendor Lock-In Risk** If the manufacturer discontinues support or updates, future compatibility with newer systems could become an issue.

---

The **ELPRO 905U-2 Wireless I/O Module** is a practical choice for applications where **wireless flexibility, modularity, and ease of installation** are prioritized over wired alternatives. Its **wide voltage compatibility, digital/analog versatility, and industrial reliability** make it suitable for automation, monitoring, and control systems in commercial, industrial, or semi-hazardous environments. However, its **wireless limitations (range, interference, latency), higher cost, and potential security risks** must be carefully considered, especially in large-scale or high-security applications.

For **small to medium-sized projects with moderate wireless demands**, this module offers a **good balance of convenience and functionality**. In contrast, for **highly sensitive, large-scale, or mission-critical systems**, a **wired solution or a more robust wireless alternative (e.g., mesh networking or proprietary industrial wireless protocols)** may be preferable.

---

- You need **wireless flexibility** in a controlled environment with minimal interference.

- Your application requires **both digital and analog signals** in a single module.

- You operate within the **13-24V AC power range** and have a stable power supply.

- Cost-effectiveness and ease of installation are key, and wireless reliability is not compromised by environmental factors.

- You plan to integrate it with **PLCs or automation systems** that support wireless communication.

- Your environment has **high electromagnetic interference, extreme temperatures, or physical obstructions** that could disrupt wireless signals.

- You require **ultra-low latency or high-speed data transmission**.

- The project is **large-scale**, and you need **scalable, low-latency wireless solutions** (e.g., Zigbee, LoRa, or proprietary industrial wireless).

- **Security is critical**, and wired solutions or encrypted wireless protocols are mandatory.

- You are working with **legacy systems** that lack wireless compatibility, requiring additional adapters.

For most **general-purpose automation, remote monitoring, or small-scale wireless control applications**, the **ELPRO 905U-2 is a solid and cost-effective choice**. However, always **evaluate your specific use case, environment, and long-term requirements** before purchasing. If in doubt, consult with the manufacturer or a system integrator to ensure compatibility with your broader setup.

Details:

Solenoid Valves. Solenoid Coils. Shock Absorbs. Pneumatic Exhaust Valves.

Knife Gate Valves. Safety and Security.

part #: 905u2 prices

• $600.75-$2438.85

specifications sensoindustria:

• brand: Elpro
• mpn: 905u-2
• part type: Module
• reference sku: 1766483
• product condition: Used Excellent

general sensoindustria:

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

seller sensoindustria:

• rating: 100.0%
• city: Delta, Ohio
• # reviews: 128340

shipping sensoindustria:

• transit: 6-6 Days
• cost: $0.00
• type: Fixed
• service: Standard, Expedited, Overnight
• class: Standard, Expedited, One-day

returns sensoindustria:

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

offer sensoindustria:

• availability: In Stock
• best offers: True
• sold: 0
• quantity: 1
• started: May 7, 2026
• options: Ship-to-home

payments sensoindustria:

• wallet: Google-pay
• credit card: Diners-club
• other

Elpro 905U-2 Is Similar To:

• 115s-13-24 Eaton Elpro Serial Module (39% similar) Eaton Elpro serial I o module model number: 115S this Elpro serial module is guaranteed to be in great working condition...(July 8th, 2018)
• 905u-1 Elpro Technologies Wireless Module Vdc Vac Ma (51.6% similar) Elpro wireless I o module model number: 905U-1 this Elpro wireless module is guaranteed to be in great working condition...(July 9th, 2018)
• Knox020057-905u-1 Elpro Module Used (44.7% similar) If another carrier such as ups or FedEx is required to ship due the size, then shipping costs may change...(August 5th, 2018)
• Westermo 105s-1 Elpro Serial Telemetry Module (39.5% similar) This module is ideal for those looking to expand their existing system or integrate new equipment into an setup. With its reliable performance and high-quality construction, the Western Elpro 105S-1 is an excellent choice for anyone in need of a top-performing plc peripheral module. The Western ...(December 3rd, 2024)