PHOENIX CONTACT 2751849 Ib Dio Module 8/8R/3

( Brand: Phoenix Contact ), ( Manufacturer Part Number: 2751849 ), ( Part Type: Module )

Review PHOENIX CONTACT Ib St Dio 8/8r/3 Input Output Module

The **Phoenix Contact 2751849 IB 24 DIO 8/8R/3** is a high-performance, modular digital input/output (I/O) module designed to deliver robust and reliable automation solutions in industrial environments. Part of Phoenix Contact s extensive **IB 24** series, this module combines versatility with compact design, making it an ideal choice for applications requiring precise digital signal control, monitoring, and communication. With a **24V DC power supply**, this module is engineered to operate seamlessly within industrial automation systems, offering eight **digital inputs (DI)** and eight **digital outputs (DO)**, along with an additional **3-wire relay output**, providing flexibility for diverse control requirements. The digital inputs are optimized for high-speed response and are equipped with **optically isolated channels**, ensuring immunity to electrical noise and voltage spikes, which is critical in harsh industrial settings. Each input channel supports a wide range of signal types, including **PNP/NPN, dry contact, and 24V DC**, while the digital outputs deliver **sink/source current up to 2A per channel**, enabling direct control of actuators, relays, or other low-power devices. The integrated **3-wire relay output** adds an extra layer of functionality, allowing for the control of higher-power loads such as motors or solenoids with a contact rating of **10A at 250V AC** or **3A at 30V DC**, making it suitable for applications where mechanical switching is required. The module s **compact, DIN-rail-mountable form factor** ensures easy integration into existing control panels or distributed I/O architectures, while its **modular design** allows for seamless expansion of the automation system. Phoenix Contact s **industrial-grade construction** incorporates robust materials and protective measures, such as **IP20 protection rating**, ensuring durability against dust, moisture, and temperature fluctuations within an operating range of **-25 C to 70 C**, making it suitable for both indoor and outdoor industrial environments. Additionally, the module supports **Phoenix Contact s proprietary IB 24 communication protocol**, enabling seamless integration with PLCs, HMIs, or other control systems via **PROFIBUS DP, PROFINET, or Ethernet/IP**, depending on the system configuration. This level of connectivity ensures real-time data exchange, diagnostics, and remote monitoring capabilities, enhancing overall system efficiency and maintenance. Whether deployed in manufacturing, process control, or building automation, the **2751849 IB 24 DIO 8/8R/3** module delivers a reliable, scalable, and high-performance solution for digital signal processing, ensuring precise control and monitoring in even the most demanding applications.

### **Phoenix Contact 2751849 IB 24 DIO 8/8R/3 Module Pros and Cons**

#### **Pros**

1. **High Reliability and Quality** Phoenix Contact is a well-established brand known for industrial-grade components with robust build quality, ensuring long-term durability in harsh environments.

2. **Wide Voltage Range** Supports input voltages from **24V DC**, making it compatible with most standard industrial power supplies.

3. **Diverse I/O Options** Offers **8 digital inputs (DI)** and **8 digital outputs (DO)**, along with **3 relay outputs**, providing flexibility for control applications.

4. **Compact and Modular Design** Fits into standard **17.5 mm rail-mount enclosures**, saving space in control panels.

5. **Isolation Protection** Features **galvanic isolation** between inputs/outputs and power supply, improving safety and noise immunity.

6. **Wide Operating Temperature Range** Operates reliably from **-40 C to 85 C**, suitable for industrial and outdoor applications.

7. **Easy Integration** Supports **PROFIBUS DP, Modbus RTU, and other industrial protocols**, making it compatible with PLCs and SCADA systems.

8. **Low Power Consumption** Efficient design minimizes energy usage, reducing operational costs.

9. **Backward and Forward Compatibility** Designed to work with existing Phoenix Contact systems and future upgrades.

10. **Good Documentation & Support** Phoenix Contact provides detailed datasheets, technical support, and software tools for configuration.

#### **Cons**

1. **Higher Upfront Cost** Compared to some generic or lesser-known brands, this module is **premium-priced**, which may be a barrier for budget-sensitive projects.

2. **Limited Output Current per Relay** Each relay output has a **max of 10A (250V AC)**, which may be insufficient for high-power applications requiring multiple high-current loads.

3. **No Built-in Diagnostics for All Channels** While it has fault monitoring, some advanced diagnostic features (e.g., per-channel input/output status logging) may require additional software.

4. **Dependence on Phoenix Contact Ecosystem** If integrating with non-Phoenix Contact systems, compatibility may require extra configuration effort.

5. **No Built-in HMI or Touchscreen Interface** Requires external HMI or PLC for user interaction, adding complexity in some setups.

6. **Potential Stock Availability Issues** As a specialized industrial component, lead times may vary, especially for older model variants.

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### **Conclusion**

The **Phoenix Contact 2751849 IB 24 DIO 8/8R/3** is a **high-quality, reliable, and versatile** digital I/O module ideal for **industrial automation, control systems, and machine applications** where **durability, isolation, and protocol compatibility** are critical. Its **modular design, wide voltage range, and robust construction** make it a strong choice for professionals who prioritize **long-term performance and safety**.

However, the **higher cost, limited high-current relay capacity, and dependency on Phoenix Contact s ecosystem** may be drawbacks for **cost-sensitive or high-power applications**. If budget is a concern, alternatives like **Siemens, Allen-Bradley, or generic brands** (with similar specs) could be considered, though they may lack the same level of support and longevity.

---

### **Recommendation**

You need a **reliable, isolated, and modular** digital I/O solution for **industrial automation**.

Your application requires **PROFIBUS DP or Modbus compatibility** with a **PLC or SCADA system**.

You operate in **harsh environments** (wide temperature ranges, vibration, or electrical noise).

You value **brand reputation, long-term support, and ease of integration** with Phoenix Contact s ecosystem.

You are working on a **tight budget** and can find a similarly rated module from a lower-cost brand.

Your application requires **higher relay current outputs** (e.g., >10A per channel).

You need **advanced diagnostics or built-in HMI features** that this module does not provide.

**Final Verdict:** For **most industrial control applications**, this module is a **strong, well-supported choice** despite its higher cost. If cost is not a limiting factor, it is a **recommended purchase** for professionals seeking **durability and compatibility**.

Details:

All goods are so AS IS' and WITH ALL FAULTS meaning, without limitation, that. Next Day Second Air Services are available. Condition: Used. Removed from a working environment.

Brand: Phoenix Contact. LOCAL PICK-UP, Prefer to pick it up yourself. Country of Manufacture: N/A. Items in Lot: 1.

We choose the carrier. Your phone number and business name. Consignee: BW. MSRP: $117.99.

Model: 2751849. Need it urgently. Will there be a dock or forklift. MPN: 2751849.

After the return period has ended, you can no longer product.

part #: 2751849 prices

• $93.75-$250.00

specifications sensoindustria:

• brand: Phoenix Contact
• mpn: 2751849
• part type: Module

payments sensoindustria:

• wallet: Paypal
• other
• credit card: Discover

returns sensoindustria:

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

offer sensoindustria:

• best offers: True
• sold: 0
• quantity: 1
• availability: In Stock
• options: Ship-to-home
• started: April 9, 2026

seller sensoindustria:

• city: Middlebury, Indiana
• rating: 99.8%
• # reviews: 64122

shipping sensoindustria:

• carrier: USPS
• type: Fixed
• cost: $13.99
• class: Expedited
• service: USPS Priority Mail
• transit: 4-9 Days

general sensoindustria:

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

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