1. Introduction
This user manual provides essential information for the proper installation, operation, and maintenance of the BANNER ENGINEERING SM31R MINI-Beam Photoelectric Sensor. The SM31R is a compact, high-performance receiver designed for industrial sensing applications, featuring a 2-meter cable, 10-30 VDC input, and bipolar 1 NPN / 1 PNP output with a 3-meter range. Please read this manual thoroughly before using the product to ensure safe and efficient operation.
2. Safety Information
Always observe the following safety precautions to prevent personal injury and damage to the equipment:
- Disconnect Power: Always disconnect power to the device before performing any installation, wiring, or maintenance procedures.
- Qualified Personnel: Installation and wiring should only be performed by qualified personnel familiar with electrical wiring practices and local codes.
- Operating Voltage: Ensure the power supply voltage matches the sensor's specified input range (10-30 VDC).
- Environmental Conditions: Do not expose the sensor to conditions outside its specified operating temperature and humidity ranges.
- Proper Use: Use the sensor only for its intended purpose as a photoelectric sensing device.
3. Product Overview
The BANNER ENGINEERING SM31R is a robust MINI-Beam photoelectric receiver. Its compact design and versatile output options make it suitable for various industrial automation tasks.
Key Features:
- Compact MINI-Beam design
- 2-meter integrated cable
- Wide input voltage range: 10-30 VDC
- Bipolar output: 1 NPN / 1 PNP
- Detection range up to 3 meters
Product Components:
Figure 3.1: Overall view of the BANNER ENGINEERING SM31R MINI-Beam Photoelectric Sensor, showing its compact yellow housing and attached 2-meter gray cable.
Figure 3.2: Detailed view of the SM31R sensor's label, indicating the wiring color code for power input and output signals (White: Sink, Blue: DC Common, Black: Source, Brown: +10 to 30Vdc).
4. Setup and Installation
4.1 Mounting
The SM31R sensor is designed for easy mounting using its integrated threaded barrel. Secure the sensor firmly in the desired position, ensuring it has a clear line of sight to the corresponding emitter (if applicable for through-beam mode) or the target object (for diffuse mode).
- Ensure the mounting surface is stable and free from excessive vibration.
- Position the sensor to avoid direct sunlight or other strong light sources that could interfere with its operation.
4.2 Wiring
The SM31R comes with a 2-meter cable. Refer to the wiring diagram on the sensor label (Figure 3.2) and the table below for correct connections. Always ensure power is disconnected before wiring.
| Wire Color | Function | Description |
|---|---|---|
| Brown | Power Input (+) | +10 to 30 VDC |
| Blue | DC Common (-) | Ground / 0 VDC |
| White | Output 1 (NPN) | Sink output, 150mA max |
| Black | Output 2 (PNP) | Source output, 150mA max |
Connect the sensor outputs to your control system (PLC, relay, etc.) according to your application's requirements. The SM31R provides both NPN (sink) and PNP (source) outputs simultaneously.
5. Operating Instructions
Once properly installed and wired, the SM31R sensor operates automatically. It functions as a receiver in a through-beam setup or as a diffuse sensor, detecting objects within its 3-meter range.
5.1 Power On
Apply 10-30 VDC power to the sensor. The sensor will typically have an indicator LED (if present) to confirm power and output status.
5.2 Detection
When an object enters the sensor's detection field (up to 3 meters), the output state will change according to its configuration (light operate or dark operate, depending on the specific model and setup). The NPN and PNP outputs will switch simultaneously.
5.3 Alignment (for Through-Beam applications)
For through-beam applications, ensure the SM31R receiver is perfectly aligned with its corresponding emitter. Most Banner Engineering sensors have alignment indicators (LEDs) to assist with this process. Maximize the signal strength for reliable operation.
6. Maintenance
The BANNER ENGINEERING SM31R sensor is designed for minimal maintenance. However, regular inspection and cleaning can prolong its lifespan and ensure consistent performance.
- Cleaning: Periodically clean the sensor lens and housing with a soft, damp cloth. Do not use abrasive cleaners or solvents that could damage the plastic.
- Inspection: Regularly check the cable for any signs of damage, fraying, or wear. Ensure all connections are secure.
- Environmental Check: Verify that the operating environment remains within the sensor's specified limits (temperature, humidity, presence of corrosive substances).
7. Troubleshooting
If the SM31R sensor is not functioning as expected, refer to the following common issues and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Sensor not powering on | No power supply; Incorrect wiring; Power supply voltage out of range. | Check power connections (Brown to +V, Blue to 0V); Verify power supply is 10-30 VDC; Check for blown fuses or tripped breakers. |
| Sensor not detecting objects | Misalignment (through-beam); Lens dirty; Object too far/close; Incorrect sensing mode; Damaged sensor. | Re-align emitter/receiver; Clean sensor lens; Verify object is within 3m range; Check sensor type (diffuse/through-beam); Replace sensor if damaged. |
| Erratic or inconsistent output | Interference from ambient light; Vibration; Loose wiring; Contaminated lens. | Shield sensor from strong light; Secure mounting; Check all wiring connections; Clean lens. |
| Output stuck ON or OFF | Short circuit in wiring; Overload on output; Internal sensor failure. | Inspect wiring for shorts; Ensure output current does not exceed 150mA; Contact Banner Engineering support if issue persists. |
8. Specifications
Detailed technical specifications for the BANNER ENGINEERING SM31R Photoelectric Sensor:
- Model Number: SM31R
- Part Number: 25622
- Input Voltage: 10-30 VDC
- Output Type: Bipolar 1 NPN / 1 PNP
- Output Current: 150mA (max per output)
- Cable Length: 2 meters
- Detection Range: 3 meters
- Product Dimensions: Approximately 79.13 x 1.97 x 79.13 inches (Note: This dimension seems unusually large for a sensor, typically refers to packaging or shipping dimensions. Actual sensor is compact.)
- Weight: Approximately 7.36 ounces
- Manufacturer: BANNER ENGINEERING
- First Available Date: November 26, 2013
9. Warranty and Support
For information regarding product warranty, technical support, or service, please contact BANNER ENGINEERING directly or visit their official website. Ensure you have your product model number (SM31R) and any relevant purchase details available when seeking support.
Manufacturer: BANNER ENGINEERING
For the most up-to-date contact information and support resources, please refer to the official Banner Engineering website or your local distributor.
