SR21-RG | Red/Green LED High-Resolution Fork Sensor, PNP/NPN, M8 Connector
The slot photoelectric sensors of the SR21 series, with 2mm slot width, are characterized by a high 12 bit (4096 steps) resolution, a low 20µs response time and a switching frequency reaching 25kHz. The setting of the switching threshold is carried-out automatically by simply pressing a push-button, or dynamically during label (or other reference) movement. The SR21-IR model with infrared emission is ideal for label or hole detection on continuous surfaces, while the SR21-RG model with double red or green emission suits color print register mark detection on transparent films for automatic packaging.
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Product information
Overview
Datalogic SR21-RG, 953151080
Sr Fork Sensor, Label Sensor Red/Green Pnp/Npn - M8
The slot photoelectric sensors of the SR21 series, with 2mm slot width, are characterized by a high 12 bit (4096 steps) resolution, a low 20??s response time and a switching frequency reaching 25kHz. The setting of the switching threshold is carried-out automatically by simply pressing a push-button, or dynamically during label (or other reference) movement. The SR21-IR model with infrared emission is ideal for label or hole detection on continuous surfaces, while the SR21-RG model with double red or green emission suits color print register mark detection on transparent films for automatic packaging.
Features:
- Teach-in setting: easy and fast setting procedure
- Dynamic setting: possibility to set the sensor while the labels film is moving
- 12 bit resolution: high detection reliability for a precise reading
- 25KHz switching frequency: high detection repeatability
- Red/Green emission model: possibility to perform contrast application
Applications:
- Packaging lines
- Labeling machines
- Paper and Printing machines
| Technical Specifications | |
|---|---|
| Product Type | Photoelectric Fork Sensor |
| Model | SR21-RG |
| Application | Label and color mark detection |
| Sensing Principle | Fork for label and color mark detection |
| Nominal Sensing Distance | 2 mm |
| Minimum Detectable Object | 0.5 mm |
| Slot Depth | 50 mm |
| Sensitivity Adjustment | Teach-in |
| Output Type | NPN/PNP L/D Selectable |
| Switching Frequency | 25 kHz |
| Response Time | 0.02 ms |
| Operating Voltage | 10-30 VDC |
| No-Load Supply Current | 55mA |
| Load Current | 100mA |
| Output Voltage Drop | 2V @ 100mA |
| LED Indicators | Yellow (status output), Green/Red (Read/Error) |
| Emission | Red/Green LED |
| Short-Circuit Protection | Yes |
| Reverse Polarity Protection | Yes |
| Impulsive Overvoltage Protection | Yes |
| Interference to External Light | According to EN 60947-5-2 : 2020 |
| Insulation Resistance | >20 MΩ @ 500 Vdc, between electronics and housing |
| Dielectric Strength | 500 Vac for 1 min, between electronics and housing |
| Housing Material | Metal - Zamak |
| Active Head Material | PMMA |
| Connections | M8 plug 4-pin |
| Dimensions | 20 x 26 x 90 mm |
| Operating Temperature | -20°C to +60°C |
| Storage Temperature | -25°C to +70°C |
| Mechanical Protection | IP65 |
| Approvals | CE, cULus |
| Shocks and Vibrations | 0.5 mm amplitude, 10-55 Hz frequency, for every axis (EN60068-2-6) |
| MPN | SR21-RG |