1. Automation/Motion Controls For Sale
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  3. ALLEN BRADLEY 845H-SJHN14FWY2C

ALLEN BRADLEY 845H-SJHN14FWY2C Automation

845h-sjhn14fwy2c Allen Bradley / 845hsjhn14fwy2c Used

( Brand: Allen Bradley ), ( Manufacturer Part Number: 845H-SJHN14FWY2C )

Review ALLEN BRADLEY 845hsjhn14fwy2c Used

The **Allen-Bradley 845H-SJHN14F-WY2C** is a high-performance, industrial-grade **CompactLogix 845H** programmable logic controller (PLC) designed to deliver robust automation solutions for demanding manufacturing, process control, and industrial applications. Part of Rockwell Automation s **CompactLogix 845H series**, this PLC is engineered to provide enhanced processing power, improved reliability, and advanced connectivity options, making it ideal for complex control systems requiring high-speed data acquisition, real-time monitoring, and seamless integration with other industrial devices.

This specific model features a **14-point digital input/output (I/O) configuration**, combining **4 discrete inputs (DI)** and **10 discrete outputs (DO)**, all of which are **sink-type** and rated for **24V DC operation**, ensuring compatibility with a wide range of standard industrial sensors and actuators. The **SJHN** designation indicates that this unit is equipped with **high-speed Ethernet (10/100 Mbps)** for fast communication with Human Machine Interfaces (HMIs), other PLCs, or enterprise systems, while the **WY2C** suffix denotes a **waterproof and dustproof (IP67-rated)** enclosure, making it suitable for harsh environments such as outdoor installations, washdown areas, or environments exposed to moisture and contaminants. The **845H** variant further distinguishes this model with its **enhanced processing capabilities**, including a **dual-core processor** that accelerates control logic execution, reduces scan times, and improves overall system responsiveness critical for applications requiring real-time performance.

Beyond its core I/O functionality, the **845H-SJHN14F-WY2C** supports **Rockwell s Studio 5000 Logix Designer software**, enabling engineers to develop, debug, and optimize control programs with ease. It also integrates seamlessly with **ControlLogix, CompactLogix, and other Rockwell Automation platforms**, facilitating scalable and modular automation architectures. Additional features include **built-in diagnostics** for proactive fault detection, **remote I/O expansion capabilities** for extended system reach, and **compatibility with a variety of communication protocols**, including **DeviceNet, EtherNet/IP, and Modbus**, ensuring flexibility in system integration. Whether deployed in discrete manufacturing, continuous process control, or hybrid automation environments, this PLC delivers a balance of performance, durability, and connectivity to meet the evolving demands of modern industrial operations.

### **Pros and Cons of buying a Allen-Bradley 845H-SJHN14FWY2C (845HSJHN14FWY2C) Micro850 Compact Controller**

The **Allen-Bradley 845H-SJHN14FWY2C** is a high-performance **Micro850 Compact Controller** designed for industrial automation, offering advanced features like **14 digital I/O, 2 analog inputs, and high-speed counter capabilities**. Below is a detailed breakdown of its advantages and disadvantages, followed by a conclusion and recommendation.

---

### **Pros**

1. **High-Speed Processing & Performance**

- The **845H series** is based on the **Micro850 platform**, which runs on a **32-bit processor** with **faster execution speeds** compared to older Micro800 models.

- Supports **real-time control** with **low latency**, making it suitable for applications requiring precise timing (e.g., motion control, PLC synchronization).

- **Deterministic I/O scanning** (down to **100 s**) improves responsiveness in critical control loops.

2. **Scalable & Modular Design**

- Part of the **Micro850 family**, which allows for **expansion via additional I/O modules** (e.g., analog, discrete, communication modules).

- Supports **up to 128 digital I/O points** when combined with expansion modules, making it versatile for growing automation needs.

- **Backward compatibility** with **Micro800 programming software (Studio 5000)** and **RSLogix Micro** (via migration tools).

3. **Enhanced Communication Capabilities**

- Built-in **EtherNet/IP port** for **device-level connectivity**, enabling integration with **Rockwell Automation systems, HMI panels, and SCADA platforms**.

- Supports **Modbus TCP** (via optional module) for compatibility with third-party systems.

- **Serial communication (RS-232/485)** via optional modules for legacy device integration.

4. **Advanced Programming & Control Features**

- **Ladder Logic (IEC 61131-3 compliant)** for traditional PLC programming.

- **Structured Text, Function Block Diagram, and Sequential Function Chart** support for more complex logic.

- **High-speed counters (up to 1 MHz)** for applications requiring precise pulse counting (e.g., motor feedback, encoder interfacing).

- **Built-in math and trigonometric functions** for signal processing and control algorithms.

5. **Rugged & Reliable Industrial Build**

- **IP67-rated enclosure** (when paired with the correct housing), making it suitable for **harsh environments** (dust, water splashes, vibration).

- **Wide operating temperature range (-20 C to 60 C)** for use in **outdoor or temperature-varying industrial settings**.

- **Low power consumption** ( 10W) for cost-effective operation.

6. **Cost-Effective Alternative to Larger PLCs**

- More **affordable than full-sized PLCs** (e.g., ControlLogix, CompactLogix) while offering **similar processing power**.

- Ideal for **small to medium-sized control applications** where a full PLC may be overkill.

7. **Easy Integration with Rockwell Ecosystem**

- Works seamlessly with **FactoryTalk View SE, FactoryTalk Analytics, and other Rockwell software**.

- **FactoryTalk Linx** support for remote monitoring and diagnostics.

- **Cloud connectivity options** (via optional modules) for Industry 4.0 applications.

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

- Part of **Rockwell Automation s established product line**, ensuring **continued support, firmware updates, and spare parts availability**.

- **Proven reliability** in industrial applications, reducing long-term downtime risks.

---

### **Cons**

1. **Limited I/O by Default**

- The **base model (845H-SJHN14FWY2C)** only has **14 digital I/O (8 DI 6 DO) 2 analog inputs (0-10V or 4-20mA)**.

- For applications requiring **more I/O**, additional **expansion modules** must be purchased, increasing system cost.

- **No built-in analog outputs** (must use an expansion module if needed).

2. **Programming Complexity for Beginners**

- While **Studio 5000** is user-friendly, **advanced features (e.g., structured text, high-speed counters) may require training**.

- **Migration from older Micro800 or SLC500** may require **additional learning curve** for existing users.

3. **Dependence on Rockwell Software**

- **Studio 5000** is **proprietary software**, which may be **more expensive than third-party PLC programming tools**.

- **Licensing costs** for full Studio 5000 functionality can be a barrier for small businesses.

- **No native support for free/open-source alternatives** (e.g., CodeSys, PLCopen-compliant tools).

4. **Limited Analog & Specialized I/O**

- **No built-in PWM, encoder inputs, or high-speed digital I/O** (must use expansion modules).

- **Analog resolution is 12-bit**, which may be **insufficient for high-precision applications** (e.g., closed-loop motor control without external DACs).

- **No built-in servo or motion control modules** (requires additional hardware like **Kinetix or PowerFlex drives**).

5. **Physical Size & Installation Constraints**

- **Slightly larger than Micro800 models**, which may **limit panel space** in compact control cabinets.

- **Requires proper mounting** (vibration damping may be needed in high-shock environments).

- **No built-in battery backup** (unlike some larger PLCs), so **non-volatile memory retention depends on external power**.

6. **Potential for Higher Long-Term Costs**

- While **cheaper upfront than a ControlLogix**, **expansion modules and communication options** can add significant cost.

- **Optional modules (e.g., Ethernet/IP, Modbus, analog outputs) are sold separately**, increasing total system expense.

7. **Limited Third-Party Support**

- **Fewer third-party drivers and libraries** compared to more open PLC platforms (e.g., Siemens, Beckhoff).

- **Less community-driven development** (fewer free tutorials, forums, or open-source plugins).

8. **Firmware & Update Dependence**

- **Firmware updates may require re-compilation of programs**, which can be disruptive in production environments.

- **No guaranteed long-term firmware support** (unlike some enterprise-grade PLCs).

---

### **Conclusion**

The **Allen-Bradley 845H-SJHN14FWY2C** is a **strong mid-range PLC** that bridges the gap between **small, simple controllers (Micro800) and full-sized PLCs (ControlLogix)**. It excels in **high-speed control, EtherNet/IP integration, and Rockwell ecosystem compatibility**, making it ideal for:

- **Small to medium automation projects** requiring **deterministic control**.

- **Applications needing EtherNet/IP for HMI/SCADA integration**.

- **Users already invested in Rockwell Automation software**.

- **Industrial environments with harsh conditions** (IP67-rated housing).

However, it has **limitations in analog I/O, specialized control features, and third-party flexibility**, which may require **additional modules or alternative PLCs** for certain applications. If **cost efficiency, Rockwell compatibility, and high-speed processing** are priorities, this controller is a **solid choice**. For applications requiring **more analog I/O, open programming, or extreme scalability**, a **different PLC (e.g., Siemens S7-1200, Beckhoff CX, or a larger ControlLogix)** may be more suitable.

---

### **Recommendation**

**Buy the 845H-SJHN14FWY2C if:**

You need a **high-performance, EtherNet/IP-enabled PLC** within a **Rockwell Automation ecosystem**.

Your application requires **high-speed counters or deterministic I/O scanning**.

You are working in an **industrial environment with IP67 requirements**.

You plan to **expand I/O later** (via Allen-Bradley expansion modules).

You are **already familiar with Studio 5000 or RSLogix Micro**.

**Consider an alternative if:**

You need **more analog I/O (outputs, high precision)** without extra modules.

You require **open-standard programming (IEC 61131-3 without Rockwell software)**.

Your budget is tight, and **a simpler Micro800 or a third-party PLC** (e.g., Siemens S7-1200) meets your needs.

You need **built-in servo/motion control** (requires additional hardware).

You prefer **lower long-term costs** and **greater third-party flexibility**.

**Final Verdict:**

The **845H-SJHN14FWY2C is a well-rounded, high-performance PLC** that **outperforms many smaller controllers** while remaining **more affordable than enterprise-grade PLCs**. If your project aligns with

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part #: 845hsjhn14fwy2c price

  • $716.24

specifications automationjack:

  • brand: Allen Bradley
  • mpn: 845h-sjhn14fwy2c

shipping automationjack:

  • cost: $12.90
  • class: Standard
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  • transit: 30-35 Days
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offer automationjack:

  • started: April 27, 2026
  • options: Ship-to-home
  • availability: In Stock
  • sold: 0
  • quantity: 1

general automationjack:

  • Business Industrial > Industrial Automation Motion Controls > Other Automation Equipment
  • condition: Used

seller automationjack:

  • city: 1 Millennium Dr, Willingboro, NJ 08046
  • rating: 99.7%
  • # reviews: 2014 44
category: business & industrial > industrial automation motion controls > automation equipment, sku: 15171717526387632,
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