Overview
The Allen-Bradley 802T-R8TD is a Series 2 time delay oiltight limit switch engineered for precision control and durability in industrial machinery and automation systems. The time delay is adjustable from 0.5…15 seconds ± 25%, making it suitable for applications requiring controlled timing of switch events. The 802T-R8TD combines welded gold and silver alloy contacts with a prism-shaped crossbar contact to provide high pressure that penetrates foreign particles, ensuring reliable operation in oily or contaminated environments.
Key Features
- Adjustable Time Delay: Adjustable from 0.5…15 seconds ± 25% for precise timing control
- Snap-Action Operation: Snap action with rotary lever arm actuator
- Contact Configuration: 1 NC, 1 NO contact arrangement
- Oiltight Enclosure: Metal housing provides protection in harsh industrial environments
- Durable Contacts: Gold and silver alloy contacts provide a protective barrier against surface oxides
Technical Specifications
Typical Applications
The Allen-Bradley 802T-R8TD is commonly deployed in:
- Machinery position detection and sequencing control
- Time-delayed shutoff or activation circuits
- Press and stamping equipment monitoring
- Conveyor and material handling systems
- Industrial automation with oily or wet environments
- Safety and protective circuits requiring precise timing
Compatibility & Replacements
Compatible With
- Rockwell Automation / Allen-Bradley industrial control systems
- Standard industrial relay cabinets and control panels
- 24 VDC and 120 VAC auxiliary circuits
- Machinery with rotary lever or cam actuation
Replaces / Drop-In Replacement For
- 802T-R4TD (similar time delay rotary lever configuration)
- 802T-R6TD (comparable oiltight time delay model)
- Earlier versions or worn 802T-R8TD units
Works With
- Allen-Bradley programmable logic controllers (PLCs) and relays
- Rockwell Automation control software and documentation
- Conduit-entry industrial wiring systems
- Standard industrial 1/2″ NPT cable glands
