At TGEP, we specialize in innovative automation solutions—from EV charging upgrades to PLC and motor control systems. In this blog, we explore a unique method of using indicator lights as control logic to operate motors—replacing traditional push buttons with a more visual, programmable approach.

This technique is ideal for training environments, diagnostics, and custom automation panels, and aligns with TGEP’s mission to deliver smart, scalable, and safe electrical solutions.

🔍 What Is Light-Based Motor Control?

In a typical PLC setup, push buttons are used to start and stop motors. But what if we used indicator lights instead?

Here’s the concept:

• A push button turns a light ON or OFF.
• The PLC monitors the light’s status.
• Based on the light’s state, the PLC starts or stops the motor.

This adds a visual layer of control and allows for more flexible logic programming.

⚙️ Why Use Lights Instead of Push Buttons?

This method offers several advantages:

• ✅ Visual Feedback: Operators can instantly see the system state.
• ✅ Training-Friendly: Great for electricians learning PLC logic.
• ✅ Safe Testing: Simulate motor control without energizing heavy loads.
• ✅ Custom Logic: Easily integrate with other automation components like FANUC robots or EVSE systems.

🔲 Block Diagram: Light-Controlled Motor Logic

[Push Button]
     ↓
[PLC Output: Light ON/OFF]
     ↓
[Indicator Light (e.g., Green)]
     ↓
[PLC Input: Monitor Light Status]
     ↓
[PLC Logic: If Light ON → Run Motor]
     ↓
[Motor Output]

This setup allows the light to act as a control signal, which the PLC uses to determine motor operation.

🛠️ Real-World Use at TGEP

Our licensed electricians have implemented this method in:

• EV charging test benches
• Conveyor system diagnostics
• PLC training panels
• Custom automation for industrial clients

By using lights as control logic, we reduce wiring complexity and improve system visibility—especially in multi-device environments.

🧠 PLC Logic Example (Ladder Diagram)

|----[ ]----( )----|     // Push Button turns on Light
|   PB     Light   |

|----[ ]------------( )----|   // Light status controls Motor
|   Light Input     Motor  |

This logic can be expanded with timers, interlocks, or safety relays.

🔗 Why TGEP?

At TGEP, we don’t just install equipment—we engineer custom control systems that are:

• 🔌 Code-compliant
• ⚡ Energy-efficient
• 🧠 Smart and scalable
• 🛠️ Built by licensed electricians

Whether you’re upgrading a motor control panel, building a PLC training rig, or integrating EVSE systems, TGEP delivers solutions that work.

📞 Ready to Automate Smarter?

Let TGEP help you design and install your next PLC-based control system. Visit www.tgep.net or contact us to speak with a licensed automation expert.

Would you like me to generate a visual block diagram or provide a downloadable PDF version of this blog?