TEXAS INSTRUMENTS PLC 500-5012 Siemens

( Brand: Texas Instruments Plc ), ( Manufacturer Part Number: 500-5012 )

Review TEXAS INSTRUMENTS PLC Siemens 5005012 Used

The **Texas PLC 500-5012** (also known as the **Siemens 5005012**) is a robust and versatile programmable logic controller (PLC) designed to meet the demands of industrial automation in applications requiring high reliability, scalability, and flexibility. Part of the Siemens LOGO! series though often categorized under the broader Texas Instruments PLC lineage due to historical manufacturing partnerships Siemens 5005012 is a compact yet powerful controller engineered for discrete control tasks in manufacturing, process automation, and building management systems. This PLC features a **12-point digital input/output (I/O) configuration**, with six configurable inputs and six configurable outputs, allowing for seamless integration into systems requiring precise control over motors, sensors, relays, or other discrete devices. Its modular design enables easy expansion, accommodating additional I/O modules or communication interfaces as operational needs evolve, making it ideal for both small-scale automation projects and larger systems where scalability is critical.

The **5005012** operates on Siemens intuitive **LOGO! software**, which provides a user-friendly programming environment with a graphical ladder logic editor, simplifying the creation, debugging, and maintenance of control logic. This PLC supports a variety of communication protocols, including **PROFIBUS DP, Modbus RTU, and ASCII**, ensuring compatibility with enterprise-level systems, SCADA platforms, and other industrial devices. Its robust construction, with an IP65-rated enclosure, protects against dust, moisture, and mechanical stress, making it suitable for harsh industrial environments such as factories, warehouses, or outdoor installations. The device also includes built-in diagnostics and error handling features, such as fault detection and recovery mechanisms, which minimize downtime and enhance system reliability.

Beyond its technical specifications, the **Siemens 5005012** is renowned for its efficiency and cost-effectiveness, offering a balance between performance and affordability that appeals to engineers and automation professionals. Its compact footprint measuring approximately **120 x 100 x 50 mm** allows for easy installation in confined spaces without compromising functionality. Whether used for controlling conveyor systems, HVAC units, packaging machinery, or other discrete automation tasks, this PLC delivers consistent performance with minimal maintenance requirements. With its blend of reliability, expandability, and ease of use, the **Texas PLC 500-5012 (Siemens 5005012)** remains a trusted choice for industries seeking a dependable yet adaptable control solution.

### **Analysis of Buying a Texas PLC (500-5012) or Siemens S7-500 (5005012) Controller**

#### **Overview**

Both the **Allen-Bradley (Rockwell Automation) 500-5012** and the **Siemens S7-500 (5005012)** are legacy programmable logic controllers (PLCs) from the 1990s early 2000s. They were widely used in industrial automation before newer platforms (e.g., Allen-Bradley CompactLogix, Siemens S7-1200/1500) became dominant. Deciding whether to buy one depends on your project requirements, budget, and long-term feasibility.

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### **Pros of Buying a Used 500-5012 or 5005012 PLC**

#### **1. Cost-Effectiveness**

- **Low Purchase Price**: Used units can be acquired for a fraction of the original cost (often **$200 $1,000** depending on condition, vs. **$1,500 $3,000 ** for new equivalents).

- **Reduced Hardware Costs**: No need to invest in newer, more expensive PLCs if the application is simple or legacy-dependent.

#### **2. Proven Reliability**

- **Battle-Tested Hardware**: Both PLCs were designed for industrial environments and have a strong track record of durability.

- **Mature Firmware**: No early-bug issues common in newer software releases; the logic has been refined over decades.

#### **3. Compatibility with Legacy Systems**

- **Existing Wiring & I/O**: If your system already uses these PLCs, replacing them with a newer model may require rewiring, retesting, and potential software migration.

- **Third-Party Support**: Many automation firms still maintain expertise in these platforms, making troubleshooting easier.

#### **4. Suitable for Simple Applications**

- **Good for Basic Control**: If your application involves straightforward logic (e.g., motor control, sequencing, basic HMI integration), these PLCs can handle it efficiently.

- **Analog/Digital I/O**: Both models offer sufficient I/O for mid-sized control tasks (e.g., 12 24 analog inputs/outputs on the 5012).

#### **5. Availability of Spare Parts**

- **Easier to Source**: While some components may be discontinued, parts like power supplies, modules, and even full PLCs are still available from distributors (e.g., Grainger, AutomationDirect, Siemens/ABB resellers).

- **Aftermarket Support**: Companies like **AutomationDirect** and **RS Components** sell compatible modules.

#### **6. Familiarity for Older Engineers**

- **Widely Understood**: Many automation technicians and engineers are trained on these platforms, reducing training costs.

- **Documentation Availability**: Manuals, ladder logic examples, and forums (e.g., **PLC Forum, Automation.com**) provide ample resources.

---

### **Cons of Buying a Used 500-5012 or 5005012 PLC**

#### **1. Limited Scalability**

- **Fixed I/O Capacity**: The 5012 has **12 digital I/O** (expandable to 200 with modules), which may be insufficient for larger systems.

- **No Built-in Ethernet**: Requires **RS-232/485** or **DNP3** for communication, making modern integration (e.g., cloud, SCADA) difficult without additional hardware.

- **No Built-in Safety Features**: Lack of built-in safety certifications (e.g., SIL, PL) compared to newer PLCs.

#### **2. Software Limitations**

- **Allen-Bradley 500**: Uses **RSLogix 500** (Windows XP-compatible), which is no longer supported.

- **Siemens S7-500**: Uses **STEP 5** or **TIA Portal (legacy mode)**, which also lacks modern updates.

- **No Cloud/IIoT Integration**: Cannot directly connect to modern SCADA, MES, or cloud platforms without middleware.

- **Limited Data Logging**: Basic logging capabilities compared to newer PLCs with built-in historian functions.

#### **3. Maintenance and Support Challenges**

- **No Official Warranty**: Used units come with no guarantee, and original manufacturers (ABB, Siemens) no longer provide direct support.

- **Deprecated Drivers**: Communication software (e.g., **ABB s 500 Series drivers, Siemens S7 communication modules**) may not work with modern OS versions (e.g., Windows 10/11).

- **Hardware Obsolescence**: Some modules (e.g., high-speed counters, analog cards) may be discontinued, increasing repair risks.

#### **4. Security Risks**

- **No Built-in Cybersecurity**: These PLCs lack encryption, firmware updates, or secure communication protocols, making them vulnerable to hacking if exposed to networks.

- **Legacy Firmware Vulnerabilities**: Older software may contain unpatched security flaws.

#### **5. Long-Term Viability Concerns**

- **Hardware Degradation**: Even if functional, the PLC may fail unexpectedly due to aging components (e.g., capacitors, solder joints).

- **Training Costs for New Engineers**: Younger technicians may lack experience with these systems, increasing reliance on retired experts.

- **Future-Proofing Issues**: If the system must evolve (e.g., adding HMI, motion control, or advanced analytics), migration to a newer PLC may be inevitable.

#### **6. Compatibility Issues with Modern Devices**

- **No Built-in Modbus TCP/IP**: Requires additional converters for easy integration with modern HMIs, SCADA, or IoT devices.

- **Limited Support for High-Speed Ethernet**: While some models support **Ethernet/IP (AB) or PROFIBUS (Siemens)**, full compatibility with modern networks requires extra hardware.

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### **Comparison Summary**

**Factor** **500-5012 (AB)** **5005012 (Siemens S7-500)**

-------------------------- ------------------------------------------- -------------------------------------------

**Programming Tool** RSLogix 500 (Windows XP) STEP 5 / TIA Portal (Legacy)

**Communication** RS-232/485, DNP3, Ethernet/IP (limited) PROFIBUS, MPI, RS-485

**I/O Capacity** 12 DI/DO expandable modules 12 DI/DO expandable modules

**Analog Support** Up to 12 AI/AO (with modules) Up to 12 AI/AO (with modules)

**Motion Control** Basic (requires additional cards) Basic (requires additional cards)

**Ease of Migration** Possible to AB CompactLogix/ControlLogix Possible to Siemens S7-1200/1500

**Cost (Used)** $300 $1,000 $400 $1,200

**Maintenance Risk** Moderate (AB parts still available) Higher (Siemens parts less common)

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### **Conclusion**

1. **The application is simple and legacy-dependent** (e.g., maintaining an existing system with no plans for expansion).

2. **Budget is a critical constraint**, and the cost savings outweigh the risks.

3. **No immediate need for cloud, high-speed networking, or advanced diagnostics**.

4. **In-house expertise exists** to handle programming, troubleshooting, and hardware maintenance.

- You need **Ethernet/IP, Modbus TCP, or PROFINET** for modern integration.

- The system requires **scalability, safety certifications, or advanced motion control**.

- You plan to **add cloud connectivity, predictive maintenance, or IIoT features**.

- **Long-term reliability and support** are priorities (newer PLCs have longer warranties and updates).

- **Training new engineers** who are unfamiliar with legacy systems.

---

### **Recommendation**

You are **replacing a failing 500-series PLC** in a stable, low-risk application.

The **total cost of ownership (TCO) is lower** than upgrading (e.g., no need for new HMI, communication hardware, or training).

You have **access to spare parts and technical support** (e.g., a local automation shop familiar with these units).

The **system will not require major changes** in the next 5 10 years.

You need **modern communication protocols** (Ethernet/IP, Modbus TCP, OPC UA).

The application requires **high-speed data acquisition, advanced analytics, or cloud integration**.

**Budget allows for a newer PLC**

Details:

Sells new and surplus product develops channels to purchase such. All products are guaranteed to be working but may show signs of use if purchasing a used product. Call to use a shipping service other than the ones listed. Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection.

part #: 5005012 prices

• $35.00-$82.89

specifications sensoindustria:

• brand: Texas Instruments Plc
• mpn: 500-5012

general sensoindustria:

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

returns sensoindustria:

• time: 30 Days
• method: Money back
• policy: Returns Accepted
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• # reviews: 190823
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offer sensoindustria:

• quantity: 1
• options: Ship-to-home
• started: February 19, 2026
• sold: 0
• availability: In Stock

shipping sensoindustria:

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• type: Fixed
• class: Standard
• cost: $12.90
• transit: 30-35 Days

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