Key facts
- Brand
- Optek
- Model
- OPB720B
- Industry
- Industrial
- Documents
- 2
- Languages
- EN
- Last added
- 2012-04-09
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Optek OPB720A/OPB720B Long Distance Reflective Switch Manual
The OPB720A and OPB720B series are long‑distance reflective switches that detect objects from 0.04" up to 12" (305 mm) using 90% reflective material. They can recognize targets as small as 0.08" (2 mm) and reject ambient light below 100 kLux. The sensors output an open‑collector signal compatible with most PLCs and TTL gates.
The manual lists electrical characteristics such as supply voltage (10‑30 V for OPB720A, 4‑7 V for OPB720B), operating temperature ranges (0 °C to +50 °C or +70 °C), maximum collector voltage (30 V), collector current (50 mA) and power dissipation (300 mW). It also includes wiring diagrams, voltage‑response curves for different reflective targets, and laser safety information.
Optek OPB720B specifications
| Detection distance range | 0.04" to 12" (1 mm to 305 mm) |
|---|---|
| Minimum object size | 0.08" (2 mm) |
| Ambient light rejection | < 100 kLux |
| Output type | Open collector |
| Cable lead length | 39" (990 mm) with 28 AWG wire |
| Supply voltage (OPB720A) | 10 V to 30 V |
| Operating temperature (OPB720A) | 0 °C to +50 °C |
| Operating temperature (OPB720B) | 0 °C to +70 °C |
| Maximum collector voltage | 30 V |
| Collector DC current (sink) | 50 mA |
| Power dissipation | 300 mW |
| Low level output voltage (OPB720A) | ≤0.8 V |
| High level output voltage (OPB720A) | 5.0 V |
Source: Optek OPB720A/OPB720B Long Distance Reflective Switch Manual
All Optek OPB720B documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
What is the supply voltage range for the OPB720A series?
The OPB720A series operates from 10 V to 30 V.
From: Optek OPB720A/OPB720B Long Distance Reflective Switch Manual
What type of output does the OPB720 series provide?
The series provides an open‑collector output transistor.
From: Optek OPB720A/OPB720B Long Distance Reflective Switch Manual
What is the supply voltage range for the OPB720A series?
The OPB720A series operates from 10 V to 30 V.
From: Optek OPB720A/OPB720B Long Distance Reflective Switch User Manual
How far can the OPB720A/OPB720B switches detect a reflective target?
Standard versions detect up to 12 inches (305 mm), while the 30VZ version can detect up to 30 inches.
From: Optek OPB720A/OPB720B Long Distance Reflective Switch User Manual