Overview
The Telco SMP-8500-PG-J is a compact diffuse proximity photoelectric sensor engineered for industrial automation and material handling applications. This sensor uses infrared light at 880nm wavelength to detect objects without direct contact, offering PNP output logic and selectable light/dark switching modes. The rugged M18 plastic housing with M12 connector provides a drop-in solution for assembly lines, packaging equipment, and production control systems.
Key Features
- Diffuse Proximity Detection: Detects objects up to 0.5m range without requiring reflectors or through-beam setup
- PNP Output, NC/NO Switchable: Flexible logic configuration (normally closed / normally open) for diverse automation control circuits
- Infrared 880nm Wavelength: Robust operation across ambient light conditions with minimal crosstalk
- High Excess Gain Design: Insensitive to dust, moisture, and contamination—ideal for wet or dirty environments
- M18 Threaded Housing: Standard industrial form factor; plastic construction keeps weight minimal (0.04 lbs)
- IP67 Rating: Sealed against water ingress and dust; suitable for washdown applications
- Wide Supply Range: Operates from 10–30 VDC, compatible with most industrial 12V and 24V control systems
Technical Specifications
| Input Supply Voltage | 10–30 VDC |
| Output Type | PNP (positive logic) |
| Maximum Load Current | 120 mA |
| Sensing Range | 0.5 m (diffuse) |
| Light Source | Infrared LED, 880 nm |
| Output Switching | Adjustable Light/Dark (NC/NO) |
| Connector | 4-pin M12 (threaded, male) |
| Housing Material | Plastic |
| Housing Thread | M18 (metric) |
| Ingress Protection | IP67 (dust-tight, water jet resistant) |
| Operating Temperature | −40 to +80 °C |
| Weight | 0.04 lbs (18 g) |
| Series | Telco SMP-8500 Diffuse Proximity |
Typical Applications
- Packaging Lines: Detect carton presence before sealing, labeling, or diverting
- Material Handling: Monitor part arrival at work stations; trigger pneumatic or servo actuation
- Assembly Automation: Verify component placement and part flow in conveyor-fed systems
- Washdown / Wet Environments: IP67 rating and robust optics handle water spray and chemical exposure
- Dirty/Dusty Locations: High excess gain design resists optical surface contamination
- General Industrial Control: Any 10–30 VDC PLC or relay circuit requiring non-contact object sensing
Compatibility & Replacements
Compatible With
- Allen-Bradley CompactLogix and ControlLogix PLC systems (24 VDC circuits)
- Siemens S7-1200, S7-1500 controllers with 24 VDC I/O modules
- Mitsubishi FX, MELSEC family programmable controllers
- Omron NX, CP series PLCs
- Standard industrial 24 VDC relay and pneumatic control circuits
- Any discrete input or pulse counter module accepting 10–30 VDC PNP logic
Replaces / Drop-In Replacement For
- Telco SMP-8500-PG-5 (same optics; fixed 5 m cable variant)
- Telco SMP-8500-MG-J (stainless steel housing alternative for corrosive environments)
- Other M18 PNP diffuse proximity sensors in the 0.5 m range class
Works With
- Software Platforms: Studio 5000 (Allen-Bradley), TIA Portal (Siemens), GX Works (Mitsubishi)
- Communication: Discrete I/O wiring only; direct 24 VDC logic signals to PLC input modules
- Cable Systems: Standard M12 4-pin industrial connector; PVC or drag-chain rated PUR cables available
- Mounting: M18 threaded socket fitting; stainless steel and plastic brackets compatible
