Overview
The Banner SM312DQD is an industry-standard Mini-Beam photoelectric sensor engineered for reliable object detection in manufacturing and material handling applications. This diffuse-mode sensor delivers 380mm sensing range with bipolar NPN/PNP output, making it compatible with most industrial PLCs and control systems. The integrated M12 quick-disconnect (QD) connector enables rapid changeover and minimizes downtime during maintenance or sensor replacement.
Key Features
- Diffuse Sensing Mode: Detects objects without reflectors—ideal for varied surface finishes and colors
- Infrared LED Beam: Consistent performance in ambient light, with response time of 1 ms
- Bipolar NPN/PNP Output: Single sensor supports both output types; configurable for light-on or dark-on operation
- M12 Quick-Disconnect: Integral 4-pin M12 connector for fast plug-and-play installation
- Compact M18 Housing: Rectangular thermoplastic housing with acrylic lens fits tight mounting spaces
- NEMA 4X / IP67 Rating: Sealed against moisture, dust, and caustic washdown environments
Technical Specifications
| Parameter | Value |
| Supply Voltage | 10–30 VDC (nominal 12VDC or 24VDC) |
| Sensing Range (Diffuse) | 380 mm |
| Sensing Mode | Diffuse (proximity detection) |
| Output Type | Bipolar: 1 NPN + 1 PNP transistor |
| Response Time | 1 ms |
| Repeatability | 300 µs |
| Power-up Delay | 100 ms |
| Connector | 4-pin M12 Integral Quick-Disconnect |
| Housing Material | Thermoplastic with acrylic lens |
| Mount Type | M18 threaded (18 mm diameter) |
| Housing Dimensions | 72.1 mm L × 12 mm W × 33.3 mm H |
| Weight | 0.05 lbs (approx. 23 g) |
| Operating Temperature | –20 °C to +70 °C |
| Humidity Rating | 90% RH @ 50 °C (non-condensing) |
| IP / NEMA Rating | IP67 / NEMA 1, 2, 3, 3S, 4, 4X, 6, 12 |
| Light Source | Infrared (IR) LED |
| Compatible Models | SM312 Series (standard diffuse variants) |
Typical Applications
- Carton Detection: Identify box presence on conveyor systems
- Web Break Detection: Monitor clear or translucent film for breaks
- Registration Marks: Locate printed marks for label or fold-line alignment
- Bottle Conveying: Count or detect bottles in high-speed beverage lines
- Baggage Handling: Trigger divert gates or sort logic in airport systems
- General Proximity Sensing: Part presence, stack height, or motion detection in automation
Compatibility & Replacements
Compatible With
- Allen-Bradley CompactLogix, MicroLogix, and SLC PLCs (via standard 24VDC input module)
- Siemens S7-1200, S7-1500, and S5 systems
- Mitsubishi FX, Q-series, and iQ-R programmable controllers
- Omron CP, NX, and CJ-series PLCs
- Schneider Electric Modicon M241 and M251 (24VDC input)
- Standard 24VDC and 12VDC industrial control circuits
- EtherNet/IP and PROFIBUS networks (when integrated via gateway or coupler)
Replaces / Drop-In Replacement For
- Banner SM312 series with integral QD connector (standard diffuse variants)
- Equivalent diffuse sensors with M12 QD connector and 380mm range from other manufacturers
Works With
- M12 quick-disconnect power/signal cordsets and extension cables
- Banner Sensor Configuration Software and TL70 teach-mode panels
- Standard 24VDC and 12VDC industrial power supplies
- EtherCAT, PROFINET, and Modbus networks (via IP67-rated gateways)
- Industry-standard PLC input modules and analog signal converters
