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  3. ALLEN BRADLEY 1492-CM1746-M04

ALLEN BRADLEY 1492-CM1746-M04 Automation

1492-cm1746-m04 Allen Bradley / 1492cm1746m04 Used

( Brand: Allen Bradley ), ( Manufacturer Part Number: 1492-CM1746-M04 )

Review ALLEN BRADLEY 1492cm1746m04 Used

The **Allen-Bradley 1492-CM1746-M04** is a high-performance, industrial-grade **CompactLogix 1746-L30ER** controller module designed for demanding automation applications requiring robust processing power, advanced communication capabilities, and seamless integration into modern control systems. Part of Rockwell Automation s trusted **CompactLogix** series, this module is engineered to deliver reliable, high-speed control for manufacturing, process automation, and discrete control environments where efficiency, scalability, and connectivity are critical. The **1492-CM1746-M04** features a **1746-L30ER** processor, which operates at a **300 MHz** clock speed, providing ample computational power to handle complex control algorithms, real-time data processing, and high-speed I/O operations without compromising performance. With **176 KB of user memory** and **16 KB of tag memory**, this controller offers sufficient storage for program logic, data tables, and communication buffers, ensuring smooth operation even in resource-intensive applications.

This module is equipped with **four Ethernet ports**, including two **10/100 Mbps** ports and two **10/100/1000 Mbps** Gigabit Ethernet ports, enabling high-speed data transfer, remote monitoring, and seamless integration with enterprise networks, SCADA systems, or other industrial devices. The inclusion of **EtherNet/IP** and **CIP (Common Industrial Protocol)** support allows for efficient communication with a wide range of Rockwell Automation products, including **ControlLogix, PowerFlex drives, PanelView HMI terminals, and Studio 5000 software**, facilitating a fully integrated automation solution. Additionally, the module supports **EtherNet/IP Trunking**, which enhances network redundancy and reliability by allowing multiple Ethernet connections to be bundled for increased bandwidth and failover protection.

The **1492-CM1746-M04** is housed in a **CompactLogix 1746-L30ER chassis**, which is part of the **1746-L30ER series**, offering a compact yet robust form factor that fits seamlessly into standard **1746-L30ER** or **1746-L30ERM** control panels. The module is designed for **industrial environments**, featuring **wide operating temperature ranges** (from **-20 C to 60 C**) and **extended humidity resistance**, making it suitable for harsh manufacturing floors, outdoor installations, or facilities with varying climatic conditions. Its **low power consumption** (approximately **20 watts**) ensures energy efficiency while maintaining peak performance, reducing operational costs and minimizing heat generation within control enclosures.

For programming and configuration, the **1492-CM1746-M04** is fully compatible with **Rockwell Automation s Studio 5000 Logix Designer**, a powerful development environment that supports **Ladder Logic (LD), Structured Text (ST), Function Block Diagram (FBD), and Sequential Function Chart (SFC)** programming languages. This flexibility allows engineers and technicians to implement custom control logic, motion control sequences, or advanced process automation routines tailored to specific application requirements. The module also supports **remote I/O expansion**, enabling the integration of additional **1746-I/O modules** or **1756 series** I/O systems to extend the control network s reach and accommodate larger-scale automation projects.

Security and reliability are prioritized in the design of the **1492-CM1746-M04**, with features such as **EtherNet/IP security protocols (CIP Security)** to protect against unauthorized access and data breaches. The module also includes **watchdog timer functionality**, ensuring system stability by automatically resetting the controller if a program hangs or crashes. Additionally, the **1746-L30ER** series supports **firmware updates** via **EtherNet/IP**, allowing for seamless upgrades to improve functionality, add new features, or patch security vulnerabilities without disrupting production. The **1492-CM1746-M04** is an ideal choice for applications requiring **high-speed control, deterministic networking, and scalable automation**, making it a versatile and future-proof solution for industries such as **automotive manufacturing, food and beverage processing, pharmaceutical production, and material handling systems**.

### **Pros and Cons of buying a Allen-Bradley 1492-CM1746-M04 (1492CM1746M04)**

#### **Overview**

The **Allen-Bradley 1492-CM1746-M04** is a **CompactLogix 1746-L30ERM** controller module with **4 analog input/output (AI/O) channels**, designed for industrial automation applications. It is part of Rockwell Automation s CompactLogix series, which is widely used in PLC (Programmable Logic Controller) systems for manufacturing, process control, and machine automation.

---

### **Pros**

1. **Compatibility and Integration**

- Fully compatible with **Rockwell Automation s ControlLogix, CompactLogix, and SLC 500** systems, ensuring seamless integration with existing or new control networks.

- Supports **EtherNet/IP, DeviceNet, and ControlNet** communication protocols, allowing flexible connectivity in industrial environments.

- Works with **Studio 5000** software for programming, monitoring, and troubleshooting, which is a robust and widely supported development platform.

2. **Reliability and Durability**

- Built to **NEMA 4X/IP65** standards, making it resistant to dust, water, and harsh industrial conditions.

- Allen-Bradley components are known for **long-term reliability**, with minimal downtime due to hardware failures.

- **Redundancy options** are available in some CompactLogix systems, improving system uptime in critical applications.

3. **Performance and Functionality**

- **4 analog channels** (configurable as inputs or outputs) with **12-bit resolution**, providing precise control for processes requiring accurate signal processing (e.g., temperature, pressure, flow).

- Supports **high-speed I/O** and **timing functions**, making it suitable for applications requiring real-time control.

- **Scalability**: Can be expanded with additional I/O modules, allowing the system to grow with changing process requirements.

4. **Support and Documentation**

- **Extensive documentation** from Rockwell Automation, including wiring diagrams, programming guides, and troubleshooting resources.

- **Global support network**: Access to certified technicians, training, and technical assistance through Rockwell s service channels.

- **Software updates and patches** are regularly released to improve functionality and security.

5. **Cost-Effectiveness in the Long Run**

- While the upfront cost may be higher than some generic PLC modules, the **reduced downtime, reliability, and ease of maintenance** often justify the investment.

- **Lower total cost of ownership (TCO)** due to fewer replacements and simpler integration with other Rockwell products.

6. **Security Features**

- Supports **EtherNet/IP security protocols**, helping protect against cyber threats in industrial networks.

- **User authentication and role-based access control** in Studio 5000 can restrict unauthorized modifications to the PLC program.

7. **Ease of Programming and Maintenance**

- **Ladder logic (LD), Structured Text (ST), and Function Block Diagram (FBD)** support in Studio 5000 make programming accessible for engineers with varying levels of expertise.

- **Remote diagnostics** allow technicians to monitor and troubleshoot the system without physical access, reducing maintenance time.

---

### **Cons**

1. **High Initial Cost**

- Compared to **generic or third-party PLC modules**, the **1492-CM1746-M04** and associated Rockwell Automation products can be **more expensive** upfront.

- Licensing costs for **Studio 5000 software** may also add to the total expenditure.

2. **Vendor Lock-In**

- Rockwell Automation s proprietary software and hardware can create **dependency on their ecosystem**, making it difficult to migrate to other PLC brands without significant reprogramming or retraining.

- **Third-party support** for Rockwell products may be limited compared to more open-standard PLCs.

3. **Complexity for Small-Scale Applications**

- For **small-scale or low-budget projects**, the **overkill nature** of the CompactLogix series (which is designed for industrial-scale automation) may not be justified.

- Simpler PLCs (e.g., **SLC 500, Micro800, or even generic PLCs**) might suffice for basic control tasks.

4. **Learning Curve**

- **Studio 5000** has a **steeper learning curve** compared to some open-source or more user-friendly PLC programming environments.

- Engineers unfamiliar with Rockwell s software may require **additional training**, increasing initial setup time.

5. **Limited Analog Channels**

- While the **4 analog channels** are sufficient for many applications, larger systems may require **additional analog modules**, increasing the overall cost.

6. **Depreciation Over Time**

- Like all industrial equipment, Rockwell Automation PLCs **depreciate over time**. Newer models with improved features (e.g., **better Ethernet/IP performance, enhanced security**) may become available, potentially requiring upgrades.

7. **Physical Size and Installation Constraints**

- The **CompactLogix chassis** is more substantial than some smaller PLCs, which may limit installation options in space-constrained environments.

- **Wiring complexity** can be higher due to the modular nature of the system, requiring careful planning during setup.

8. **Potential for Obsolescence**

- While Rockwell Automation maintains support for older models, **long-term availability** of spare parts and software updates may decline as newer generations are released.

- Some older models may **discontinue production**, making future replacements or upgrades more difficult.

---

### **Conclusion**

The **Allen-Bradley 1492-CM1746-M04** is a **high-quality, reliable, and feature-rich** PLC module ideal for **industrial automation applications** where **precision, scalability, and integration with Rockwell s ecosystem** are critical. Its **durability, extensive support, and advanced communication capabilities** make it a strong choice for **manufacturing, process control, and machine automation** in environments requiring robust and maintainable control systems.

However, the **higher cost, vendor lock-in, and complexity** may not be justified for **small-scale or budget-sensitive projects**. Engineers should carefully evaluate whether the **long-term benefits outweigh the initial investment**, especially if they are already working within Rockwell s platform.

For **new projects with limited budgets or those requiring flexibility**, alternatives like **Siemens S7-1200, Mitsubishi FX or Q series, or even open-source PLCs** might be worth considering. Conversely, if **reliability, industry-standard integration, and future scalability** are priorities, the **1492-CM1746-M04 remains a sound investment**.

---

### **Recommendation**

**Buy the 1492-CM1746-M04 if:**

- You are **already using Rockwell Automation s ecosystem** (e.g., ControlLogix, Studio 5000).

- Your application requires **high reliability, analog I/O, and industrial-grade durability**.

- You plan to **scale the system in the future** and need compatibility with additional CompactLogix modules.

- **Cost of downtime and maintenance** is a significant concern, and the long-term value of Rockwell s support justifies the upfront expense.

**Avoid or consider alternatives if:**

- Your project is **small-scale, low-budget, or non-industrial**, where simpler PLCs (e.g., Micro800, SLC 500) would suffice.

- You **prioritize vendor flexibility** and want to avoid proprietary software/hardware.

- You are **unfamiliar with Rockwell s programming environment**, as the learning curve may delay project timelines.

- **Space or wiring constraints** make the CompactLogix chassis impractical.

**Final Verdict:**

For **industrial automation projects where reliability, integration, and scalability are key**, the **1492-CM1746-M04 is an excellent choice**. However, for **cost-sensitive or non-industrial applications**, exploring alternatives may lead to a more efficient solution. Always conduct a **detailed cost-benefit analysis** and consider **long-term maintenance and support** before making a purchase decision.

Details:

The product is used surplus. All products are guaranteed to be working but may show signs of use. Call to use a shipping service other than the ones listed. ALLEN BRADLEY 1492-CM1746-M04 / 1492CM1746M04 USED CONVERSION MODULE, GREY SHORT CORD, MOUNTABLE.

Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection.

part #: 1492cm1746m04 prices

  • $115.00-$199.00

specifications automationjack:

  • brand: Allen Bradley
  • mpn: 1492-cm1746-m04

seller automationjack:

  • # reviews: 1985 90
  • city: 1 Millennium Dr, Willingboro, NJ 08046
  • rating: 99.6%

general automationjack:

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

offer automationjack:

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

shipping automationjack:

  • transit: 2-5 Days
  • class: Standard
  • type: Fixed
  • service: Standard
  • cost: $12.90

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returns automationjack:

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category: business & industrial > industrial automation motion controls > automation equipment, sku: 14748837794647632,
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