SUMTAK LEC-80BM-S128A Optcoder Encoder Usip 5V 80MA

( Brand: Sumtak ), ( Manufacturer Part Number: LEC-80BM-S128A )

Review SUMTAK Optcoder Encoder Dc 5v 80ma Usip

The **Sumtak LEC-80BM-S128A OTPCoder** is a high-performance, industrial-grade optical encoder designed for precision motion control applications where reliability, durability, and seamless integration are paramount. This compact yet robust encoder operates on a **5V DC power supply** with a **maximum current draw of 80mA**, making it ideal for low-power systems while still delivering exceptional performance. Built with an **optical incremental encoder** technology, the LEC-80BM-S128A provides **128 pulse pairs per revolution (PPR)**, offering a resolution of **256 pulses per revolution (PPR)** when configured for quadrature output, ensuring smooth and accurate position feedback for servo motors, stepper motors, or linear actuators. Its **USIP (Universal Serial Interface Protocol)** compatibility simplifies integration into various motion control systems, allowing for easy communication with PLCs, CNC machines, robotics, and automated manufacturing equipment.

The encoder s **high-precision optical sensing mechanism** eliminates mechanical wear and tear associated with traditional magnetic or Hall-effect encoders, resulting in longer operational life and reduced maintenance requirements. Its **IP67-rated housing** provides exceptional protection against dust, moisture, and contaminants, making it suitable for harsh industrial environments such as factory floors, automotive assembly lines, or outdoor applications where exposure to the elements is a concern. The robust construction ensures resistance to shock, vibration, and temperature fluctuations, typically operating within a range of **-20 C to 70 C**, though it can withstand brief excursions beyond this range without compromising performance.

One of the standout features of the Sumtak LEC-80BM-S128A is its **flexible mounting options**, including a **5mm shaft diameter** and a **standard 5mm keyway**, allowing for easy installation on a variety of motor types. The encoder s **backlash-free design** ensures minimal positional error, which is critical for applications requiring high repeatability, such as CNC machining, packaging equipment, or medical devices. Additionally, its **low-profile design** minimizes interference with surrounding components, making it a space-efficient solution for compact machinery.

For users requiring **customization or additional functionality**, the LEC-80BM-S128A supports **index pulses**, which can be configured to provide a reference mark for absolute positioning or synchronization. The encoder s **digital output signals (A/B phases and index)** are compatible with most motion control interfaces, including **TTL, CMOS, or LVDS levels**, depending on the application s requirements. Whether used in **automation, robotics, or precision motion systems**, this encoder delivers a perfect balance of **accuracy, durability, and ease of integration**, making it a versatile choice for engineers and designers seeking a dependable optical encoder solution.

### **Pros and Cons of buying a Sumtak LEC-80BM-S128A (Opto-Coupler Encoder, 5V, 80mA, USIP)**

#### **Pros**

1. **High Precision and Reliability** The LEC-80BM-S128A is a quadrature encoder, which provides accurate position and speed feedback. Its optical design (optocoupler) ensures durability and resistance to electromagnetic interference (EMI), making it suitable for industrial and high-reliability applications.

2. **Low Power Consumption** Operates at **5V** with a current draw of **80mA**, making it energy-efficient for embedded systems, robotics, and motor control applications where power management is critical.

3. **Compact and Space-Efficient** The **USIP (Ultra-Small Incremental Package)** form factor allows for easy integration into tight spaces, such as in small motors, CNC machines, or automated systems.

4. **High Resolution (128 PPR)** While not extremely high (compared to 1024 PPR encoders), 128 pulses per revolution (PPR) provides sufficient resolution for many basic motion control tasks, including stepper motor feedback, simple servo systems, or position tracking in low-to-medium precision applications.

5. **Optical Isolation (Optocoupler)** The optocoupler design eliminates noise from power supply fluctuations and motor back-EMF, improving signal integrity in noisy environments.

6. **Cost-Effective** Compared to higher-resolution or more advanced encoders, this model offers a balance between performance and affordability, making it a budget-friendly choice for hobbyists and small-scale industrial projects.

7. **Easy to Interface** The quadrature output (A/B channels) is standard and compatible with most microcontrollers (Arduino, Raspberry Pi, STM32, etc.) and motor drivers (e.g., DRV8825, TB6600). It can be read using simple pulse counting or incremental encoders libraries.

8. **Durable Construction** Designed for industrial use, it likely has a robust build that can withstand vibration and environmental factors better than some consumer-grade sensors.

9. **No External Power Needed for Output** Unlike some encoders that require additional power for their output stage, this model likely operates directly from the 5V supply, simplifying wiring.

10. **Versatile Applications**

- **Stepper motor feedback** (to prevent lost steps)

- **Servo motor position sensing**

- **Linear motion tracking** (e.g., in 3D printers, CNC machines)

- **Robotics** (wheel encoders for odometry)

- **Automation systems** (conveyor belts, robotic arms)

---

#### **Cons**

1. **Limited Resolution (128 PPR)** For applications requiring high precision (e.g., CNC milling, high-speed servo control, or fine robotics), 128 PPR may be insufficient. Higher-resolution encoders (e.g., 512, 1024, or 2048 PPR) are often preferred for smoother motion and better feedback.

2. **No Index Hole (Single-Channel Output)** Unlike some encoders with an index (Z) channel, this model likely only provides A/B quadrature channels. This means it cannot provide absolute position reference without additional hardware (e.g., a hall sensor or external counter).

3. **No Built-in Amplification or Signal Conditioning** The output may require additional circuitry (e.g., Schmitt triggers, level shifters) if interfacing with high-impedance inputs or noisy environments. Some encoders include built-in signal conditioning for easier use.

4. **Potential for Signal Noise in High-Vibration Environments** While the optocoupler reduces EMI, mechanical vibration can still affect optical encoders over time, potentially leading to miscounts or signal loss if not properly mounted.

5. **Limited Documentation or Support** Depending on the brand (Sumtak), documentation may be less detailed compared to well-established manufacturers like **US Digital, HEIDENHAIN, or Encoders.com**. This could make troubleshooting or integration slightly more challenging.

6. **Not Waterproof or IP-Rated** Unless specified otherwise, this encoder is likely not sealed against dust or moisture. For outdoor or harsh environments, a higher-rated model (e.g., IP67) would be necessary.

7. **Compatibility Issues with Some Motor Drivers** Some advanced motor drivers (e.g., high-performance servo controllers) may require specific encoder types or additional configuration. Always check compatibility before purchasing.

8. **No Absolute Positioning** Being an incremental encoder, it cannot provide absolute position without power cycling or an external counter. For applications requiring power-up position recovery, an absolute encoder would be better.

9. **Potential for Drift Over Time** Optical encoders can experience wear or misalignment in the optical path, leading to occasional miscounts. This is less common but worth considering for long-term reliability.

10. **No Built-in Filtering for High-Speed Applications** At very high speeds, the encoder may require external filtering to prevent ghost pulses or signal degradation.

---

### **Conclusion**

The **Sumtak LEC-80BM-S128A** is a **functional, cost-effective optocoupler encoder** suitable for **basic motion control, stepper motor feedback, and low-to-medium precision applications**. Its **128 PPR resolution, 5V/80mA operation, and compact size** make it a practical choice for hobbyists, small-scale automation, and industrial systems where high precision is not critical.

However, if your application demands **higher resolution, absolute positioning, or robustness in harsh environments**, you may need to consider alternatives such as:

- **Higher-resolution incremental encoders** (e.g., 512 PPR)

- **Absolute encoders** (for power-up position recovery)

- **Hall-effect encoders** (for better noise immunity in high-vibration settings)

- **Industrial-grade encoders** (with IP ratings and better documentation)

---

### **Recommendation**

You need a **simple, low-cost encoder** for stepper motor feedback or basic position sensing.

Your application requires **only 128 PPR resolution** (e.g., 3D printers, small CNC machines, robotics with moderate precision needs).

You are working in a **relatively clean environment** with minimal EMI or vibration.

You are comfortable with **incremental encoding** and can handle power-up position loss.

You need **higher precision** (e.g., for CNC milling, high-speed servos, or fine robotics).

You require **absolute positioning** (e.g., power-up position recovery).

Your environment has **high vibration, dust, or moisture** (consider an IP-rated or Hall-effect encoder).

You need **better documentation or support** (brands like **US Digital or Encoders.com** may offer more reliable products).

- For **higher resolution**: **US Digital E6B2-CWZ62** (512 PPR) or **HEIDENHAIN ERN 80** (1024 PPR).

- For **absolute positioning**: **AS5048A** (magnetic absolute encoder) or **LEM Encoders** (industrial absolute encoders).

- For **industrial robustness**: **Sick, ifm, or Baumer** encoders with IP67 ratings.

If your project fits the **Sumtak encoder s specifications**, it is a **solid, budget-friendly choice**. Otherwise, investing in a slightly more advanced encoder may save time and improve reliability in the long run.

Details:

Most items are in stock when they listed. Manufacturer Part Number: LEC-80BM-S128A. 2-Year MRO Shield Protection Plan Included. Sumtak LEC-80BM-S128A Optcoder Encoder, DC 5V 80mA Manufactured by SUMTAK.

Special Instructions. The product must be the original item shipped, with matching serial numbers if applicable. Sumtak LEC-80BM-S128A Optcoder Encoder, DC 5V 80mA. A previously used, fully functional product that may have some signs of cosmetic wear.

part #: lec80bms128a price

• $9.60

specifications linactuat:

• brand: Sumtak
• mpn: Lec-80bm-s128a

offer linactuat:

• quantity: 1
• sold: 0
• availability: In Stock
• options: Ship-to-home
• started: April 19, 2026
• best offers: True

shipping linactuat:

• service: USPS Ground Advantage, USPS Priority Mail, UPS Ground, UPS Next Day Air
• carrier: USPS, UPS
• type: Calculated
• cost: $10.50
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• transit: 5-11 Days

general linactuat:

• condition: Used
• Industrial Automation Motion Controls > Rotary Linear Motion > Linear Encoders

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• # reviews: 24245
• rating: 99.8%
• city: Mount Sterling, Kentucky

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• method: Money back
• time: 30 Days

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