PILZ 772171 Plc Modules

( Brand: Pilz ), ( Manufacturer Part Number: 772171 ), ( Part Type: Module )

Review PILZ Used

The **PILZ 772171** is a high-performance, compact safety relay designed for demanding industrial applications where reliability, precision, and compliance with stringent safety standards are paramount. Engineered with PILZ s signature expertise in functional safety, this relay is specifically tailored for use in machinery and automation systems where the safe operation of processes is critical. The 772171 features a robust, IP65-rated enclosure, ensuring protection against dust, dirt, and moisture, which makes it ideal for harsh environments such as manufacturing plants, chemical processing facilities, or outdoor installations where exposure to the elements is a concern. Its compact yet sturdy design allows for flexible integration into control panels or distributed safety architectures without compromising on performance.

At its core, the 772171 operates as a **safety-rated relay** with a **Category 3/2 or Category 4/3** (EN ISO 13849-1) classification, depending on the configuration, making it suitable for applications requiring high levels of safety integrity. It is capable of handling both **safety-related and non-safety-related signals**, allowing it to serve as a versatile component in safety circuits while also managing conventional control functions. The relay s **normally open (NO) and normally closed (NC) contacts** are designed to meet the stringent demands of safety circuits, ensuring reliable switching even under extreme conditions, such as high voltage or current surges. With a **contact rating of up to 6A at 250V AC (resistive load)** and **10A at 30V DC**, it provides ample capacity for a wide range of applications, from simple safety interlocks to complex emergency stop circuits.

One of the standout features of the 772171 is its **modular and adaptable design**, which allows for easy customization to fit specific safety requirements. It can be configured with **diagnostic outputs**, such as a **LED indicator** for status monitoring, or integrated into larger safety systems via **PROFIBUS PA, AS-i, or other fieldbus networks**, enabling seamless communication with higher-level control systems. The relay s **self-monitoring capabilities** further enhance its reliability, as it continuously checks its own functionality and can signal faults or malfunctions through integrated diagnostics, reducing downtime and improving overall system safety. Additionally, its **compliance with international standards** including **EN 61508, IEC 62061, and ISO 13849-1** ensures that it meets the rigorous safety certification requirements for machinery and industrial automation worldwide.

Beyond its technical specifications, the 772171 exemplifies PILZ s commitment to **user-friendly design and ease of integration**. Its **clear labeling and intuitive wiring scheme** simplify installation and maintenance, while its **compact footprint** allows for efficient use of space in crowded control cabinets. Whether used in **emergency stop circuits, door safety systems, or multi-channel safety monitoring**, this relay delivers the precision and dependability required to protect personnel and assets. By combining **high-performance switching, robust construction, and advanced safety features**, the PILZ 772171 stands as a cornerstone in modern safety automation, ensuring that industrial processes operate with both efficiency and uncompromising safety.

### **Pilz 772171 Overview**

The **Pilz 772171** is a **safety relay** designed for industrial automation, particularly in **safety-related control circuits** (e.g., safety doors, emergency stops, and machine safeguarding). It is part of the **Pilz PNOZ safety series** and complies with **EN ISO 13849-1** (SIL 2, PL d) and **IEC 62061** standards.

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### **Pros of buying a Pilz 772171**

1. **High Safety Integrity**

- Certified to **SIL 2 (Safety Integrity Level 2)** and **PL d (Performance Level d)**, meaning it provides a high level of reliability in critical safety applications.

- Meets strict **EN ISO 13849-1** and **IEC 62061** standards, ensuring compliance with global safety regulations.

2. **Modular and Flexible Design**

- Can be combined with other **PNOZ safety relays** (e.g., 772170, 772172) to create complex safety logic circuits.

- Supports **safety-rated outputs** (e.g., 24V DC, 230V AC) for direct control of safety devices.

3. **Easy Integration with Pilz Systems**

- Works seamlessly with **Pilz safety controllers** (e.g., **PNOZ multi, PSS 4000**) and **PLCs** (e.g., **PCS 7, PSS 4000**).

- Compatible with **Pilz s safety software tools** (e.g., **PSS 4000, PNOZedit**) for programming and diagnostics.

4. **Diagnostic Features**

- Built-in **self-diagnostics** (e.g., open/short circuit detection) help identify faults quickly.

- Supports **remote diagnostics** via **Pilz s safety monitoring systems**, reducing downtime.

5. **Long-Term Availability & Support**

- Pilz is a **reliable, established manufacturer** with a strong global support network.

- The **772171 is a legacy but still widely supported** model, meaning spare parts and documentation remain accessible.

6. **Compact and Space-Efficient**

- Fits into standard **17.5 mm rail-mounted enclosures**, making it suitable for space-constrained industrial environments.

7. **Wide Input/Output Voltage Range**

- Supports **24V DC inputs** (standard for safety circuits) and **230V AC outputs**, offering flexibility in wiring.

8. **Compliance with ATEX & IECEx (Optional)**

- Can be configured for **explosion-proof applications** (if required), though this depends on specific variants.

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### **Cons of buying a Pilz 772171**

1. **Legacy Technology (Potential Obsolescence Risks)**

- While still functional, the **772171 is an older model** compared to newer **PNOZ safety relays** (e.g., **PNOZ 3xxx series**).

- Pilz may **discontinue direct support** for this model in the future, though it remains widely available through distributors.

2. **Limited Advanced Features Compared to Modern Alternatives**

- **Higher SIL ratings (SIL 3 possible with some models)**

- **Built-in communication (PROFIsafe, Ethernet/IP)**

- **Enhanced diagnostic capabilities (e.g., event logging, remote monitoring)**

- The **772171 lacks these modern connectivity options**.

3. **Higher Cost for Basic Functionality**

- While not excessively expensive, **newer Pilz safety relays** (e.g., **PNOZ 3100**) may offer **better performance per dollar** in long-term projects due to advanced features.

- If buying in bulk, **newer models may provide better scalability**.

4. **Limited Software Integration**

- Older models may not integrate as smoothly with **modern PLCs or safety controllers** compared to newer Pilz devices.

- Requires **legacy software tools**, which may not be as user-friendly as newer Pilz programming environments.

5. **Single-Channel Design (Limited Parallel Safety Channels)**

- The **772171 is a single-channel relay**, meaning it cannot directly implement **dual-channel safety logic** (which requires at least two independent relays).

- For **higher safety integrity (SIL 3)**, additional components (e.g., **PNOZ 3200**) are needed.

6. **Potential Learning Curve for New Users**

- If operators or engineers are unfamiliar with **Pilz s older safety relay systems**, training may be required to properly configure and maintain the device.

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### **Conclusion**

The **Pilz 772171** remains a **reliable, well-supported safety relay** for applications requiring **SIL 2 / PL d** compliance. It is an **excellent choice** for:

- **Existing installations** where backward compatibility is needed.

- **Simple safety circuits** (e.g., door interlocks, emergency stops) where advanced features are unnecessary.

- **Budget-conscious projects** where cost is a primary concern and long-term availability is ensured.

- **Higher safety integrity (SIL 3)**

- **Modern communication (PROFIsafe, Ethernet/IP)**

- **Advanced diagnostics and remote monitoring**

- **Future-proofing against obsolescence**

Then **newer Pilz safety relays (e.g., PNOZ 3100, PNOZ 3200)** would be a **better long-term investment**.

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### **Final Recommendation**

- You are maintaining an **existing system** that already uses this relay.

- Your application only requires **SIL 2 / PL d** and does not need advanced features.

- You have **limited budget constraints** and can ensure long-term spare parts availability.

- You are working in a **legacy environment** where newer relays are not compatible.

- You need **higher safety levels (SIL 3 possible with some models).**

- Your system requires **modern communication protocols (PROFIsafe, Ethernet/IP).**

- You want **better diagnostics, remote monitoring, and future scalability.**

- You are starting a **new project** and want to avoid potential obsolescence risks.

For **new installations**, evaluating the **PNOZ 3xxx series** or consulting with a **Pilz distributor** to assess the best fit for your specific safety requirements is advisable.

Details:

PILZ 772171 / USED INPUT MODULE, PNOZ M EF 2MM, PNOZMULTI 2 SIO, SAFE MONITORING. Sells new and surplus product develops channels to purchase such. Part Number 772171. All products are guaranteed to be working but may show signs of use if purchasing a used product.

Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection. Call to use a shipping service other than the ones listed.

part #: 772171 price

• $790.52

specifications sensoindustria:

• brand: Pilz
• mpn: 772171
• part type: Module

offer sensoindustria:

• quantity: 1
• availability: In Stock
• started: March 3, 2026
• sold: 0
• options: Ship-to-home

general sensoindustria:

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

payments sensoindustria:

• wallet: Google-pay
• credit card: Discover
• other

returns sensoindustria:

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

seller sensoindustria:

• rating: 99.6%
• # reviews: 192692
• city: 1 Millennium Dr, Willingboro, NJ 08046

shipping sensoindustria:

• type: Fixed
• class: Standard
• cost: $12.90
• transit: 29-34 Days
• service: Standard

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