Product Summary
The Denki Seigyo DLD Series Laser Displacement Sensors provide high-precision non-contact measurement with advanced CMOS laser technology, digital display, fast response times, and flexible output options including PNP/NPN switching outputs, Analog Output, and RS-485 Communication. Designed for industrial automation, inspection, and quality control systems, the DLD Series delivers reliable and accurate measurement performance in demanding applications.
Key Features
✔ CMOS laser displacement measurement technology
✔ High-precision non-contact measurement
✔ Digital LED display with real-time distance indication
✔ PNP or NPN switching output options
✔ Analog output version available
✔ RS-485 Modbus communication version available
✔ Fast response time up to 1.5 ms
✔ One-point, two-point and window teaching modes
✔ Zero adjustment function
✔ Threshold fine tuning
✔ Key lock function
✔ External teach input
✔ Reverse polarity protection
✔ Short-circuit protection
✔ Compact industrial design
✔ IP67 protection rating
Product Overview
The DLD Series is engineered for:
- Distance measurement
- Thickness inspection
- Height detection
- Position verification
- Gap measurement
- Edge positioning
- Production quality control
- Automated dimensional inspection
The visible laser beam and intelligent signal processing ensure reliable measurements on moving and stationary targets.
Available Models
Analog Output Models
| Model | Output Configuration | Reference Distance |
|---|---|---|
| DLD-S100PA | PNP + Analog Output | 100 mm |
| DLD-S200PA | PNP + Analog Output | 200 mm |
| DLD-S435PA | PNP + Analog Output | 435 mm |
| DLD-S100NA | NPN + Analog Output | 100 mm |
| DLD-S200NA | NPN + Analog Output | 200 mm |
| DLD-S435NA | NPN + Analog Output | 435 mm |
RS-485 Communication Models
| Model | Output Configuration | Reference Distance |
|---|---|---|
| DLD-S100PC | PNP + RS485 Communication | 100 mm |
| DLD-S200PC | PNP + RS485 Communication | 200 mm |
| DLD-S435PC | PNP + RS485 Communication | 435 mm |
| DLD-S100NC | NPN + RS485 Communication | 100 mm |
| DLD-S200NC | NPN + RS485 Communication | 200 mm |
| DLD-S435NC | NPN + RS485 Communication | 435 mm |
Model Code Explanation
Example: DLD-S435PA
| Code | Description |
|---|---|
| D | Denki Seigyo |
| LD | Laser Displacement Sensor |
| S435 | 435 mm Reference Distance |
| P | PNP Output |
| N | NPN Output |
| A | Analog Output |
| C | RS-485 Communication |
Technical Specifications
Optical Specifications
| Parameter | Specification |
|---|---|
| Sensor Type | CMOS Laser Displacement Sensor |
| Detection Principle | Laser Triangulation |
| Laser Source | Visible Red Semiconductor Laser |
| Laser Class | Class 2 |
| Display Resolution | 0.1 mm |
| Measuring Mode | Continuous Distance Measurement |
| Repeat Accuracy | Up to ±0.15 mm |
| Linear Accuracy | Up to ±0.3% F.S. |
The DLD Series provides stable and repeatable measurements for industrial inspection and automation systems.
Electrical Specifications
| Parameter | Specification |
|---|---|
| Supply Voltage | 12–24 VDC |
| Current Consumption | ≤ 40 mA |
| Switching Output | PNP or NPN |
| Analog Output | 0–10V DC (A Models) |
| Communication | RS-485 Modbus RTU (C Models) |
| Response Time | 1.5 ms / 5 ms / 10 ms Selectable |
| Protection | Reverse Polarity / Short Circuit |
Output Selection
Analog Output Version (A)
Suitable for:
- PLC analog input modules
- Process control systems
- Continuous distance monitoring
- Thickness measurement systems
Output:
- 0–10V Analog Signal
- Switching Output
Communication Version (C)
Suitable for:
- PLC networking
- SCADA systems
- MES integration
- Industry 4.0 applications
Communication:
- RS-485 Modbus RTU
- Distance data transmission
- Remote parameter configuration
- Multi-sensor networking
Display & Teaching Functions
Digital Display
The integrated LED display provides:
✔ Real-time measurement value
✔ Output status indication
✔ Parameter settings
✔ Teaching guidance
Teaching Modes
One-Point Teach
Simple threshold setting using a reference target.
Two-Point Teach
Provides accurate switching point configuration.
Window Mode
Detects objects within a specified measurement range.
Zero Adjustment
Allows easy reference position calibration.
Threshold Fine Tuning
Precise adjustment of switching points.
Mechanical Specifications
| Parameter | Specification |
|---|---|
| Housing Material | Die-Cast Aluminum |
| Front Lens | Acrylic |
| Display | Integrated LED Display |
| Mounting Type | Bracket Mount |
| Protection Structure | Fully Sealed Housing |
| Connection | Multi-Core Cable |
Environmental Specifications
| Parameter | Specification |
|---|---|
| Protection Rating | IP67 |
| Operating Temperature | -10°C to +50°C |
| Storage Temperature | -20°C to +70°C |
| Humidity | 35–85% RH |
| Ambient Light Resistance | High Immunity |
| Vibration Resistance | Industrial Grade |
| Shock Resistance | Industrial Grade |
Designed for long-term operation in demanding factory environments.
Applications
The DLD Series is ideal for:
✔ Thickness measurement
✔ Height measurement
✔ Gap inspection
✔ Position verification
✔ Robotic positioning
✔ Semiconductor manufacturing
✔ Electronics assembly
✔ Packaging machinery
✔ Conveyor automation
✔ Quality control systems
✔ CNC machinery
✔ Industrial automation
Why Choose Denki Seigyo DLD Series?
✔ High accuracy laser measurement
✔ PNP and NPN output options
✔ Analog and communication versions
✔ Fast response speed
✔ Digital display for easy setup
✔ Industrial-grade reliability
✔ Compact installation design
✔ Easy PLC integration.
Denki Seigyo DLD Series laser displacement sensor with PNP/NPN outputs, analog output or RS485 communication, digital display, and high-precision non-contact distance measurement.
What is the difference between DLD-S435PA and DLD-S435PC?
- DLD-S435PA = PNP Output + Analog Output
- DLD-S435PC = PNP Output + RS-485 Modbus Communication
Are NPN output models available?
Yes. The DLD Series is available in both PNP and NPN output versions.
What measuring distances are available?
The series is available in:
- 100 mm
- 200 mm
- 435 mm
reference distance models.
Does the DLD Series support PLC communication?
Yes. Communication models support RS-485 Modbus RTU for PLC, HMI, and SCADA integration.
What applications are suitable for laser displacement sensors?
Laser displacement sensors are widely used for thickness measurement, height control, position verification, dimensional inspection, and automated quality control.
