Overview
The Banner SM2A31RQDP is an industry-standard Mini-Beam Series photoelectric sensor receiver engineered for retro-reflective and opposed-mode detection in industrial applications. This receiver unit operates on 24-240 V ac input with SPST solid-state 2-wire output and provides straightforward setup and maintenance. The combination of proven Mini-Beam optics and rugged construction makes this sensor suitable for manufacturing lines, material handling, and process automation where reliable object detection is critical.
Key Features
- 3-meter (10 ft) sensing range for opposed-mode and retro-reflective applications
- 150 mm (6 in) M12 pigtail with quick-disconnect connector for easy field replacement
- Infrared LED at 880nm with potentiometer gain adjustment
- SPST solid-state AC output contact type eliminates mechanical relay wear
- M18 threaded mount with -20…+70°C ambient operating range
- IP67 rated, NEMA 4X enclosure rating for wash-down and harsh environments
Technical Specifications
| Parameter | Value |
| Part Number | SM2A31RQDP |
| Manufacturer | Banner Engineering |
| Series | Mini-Beam SM2A312 AC Series |
| Sensing Mode | Opposed / Retro-reflective (receiver only) |
| Sensing Range | 3 m (10 ft) |
| Input Voltage | 24–240 V AC |
| Output Type | SPST Solid-State 2-Wire AC Switch |
| Output Response Time | 2 ms ON / 1 ms OFF |
| Power-Up Delay | 300 ms |
| Sensing Light Source | Infrared LED (880 nm) |
| Housing Material | Thermoplastic with acrylic lens |
| Mounting Style | M18 threaded mount, rectangular form |
| Cable Length | 150 mm (6 in) M12 pigtail, quick-disconnect |
| Operating Temperature | –20 to +70 °C (–4 to +158 °F) |
| IP / NEMA Rating | IP67 / NEMA 4X / NEMA 4 / NEMA 3S / NEMA 3 / NEMA 2 / NEMA 1 |
Typical Applications
- Automated manufacturing assembly lines for part presence and position detection
- Conveyor systems and sorting equipment using opposed-mode or retro-reflective setups
- Rotary table indexing and machine tool safety interlocks
- Packaging and filling machinery requiring precise object detection
- Warehouse and logistics automation for object counting and tracking
- Machine guarding and safety monitoring in industrial environments
Compatibility & Replacements
Compatible With
- Banner Mini-Beam SM2A312 series emitters (for opposed-mode detection)
- Banner retro-reflective targets and corner cubes
- Standard M18 sensor mounting blocks and enclosures
- AC-powered PLC and automation control systems rated 24–240 V
- Industrial safety circuits and machine control relays
- Standard industrial panel mount quick-disconnect socket connectors
Replaces / Drop-In Replacement For
- SM2A31RQD (integral M12 connector variant)
- Earlier Banner Mini-Beam AC receiver models with comparable form factor and specifications
Works With
- AC-powered automation control circuits (24–240 V nominal)
- Solid-state relay modules and industrial contactors
- PLC and distributed I/O systems with AC relay input modules
- Banner diagnostic and setup software (if applicable to your system)
- Standard industrial M12 quick-disconnect wiring and connectors
