Overview
The Farmer Electric TR3-4 is a vintage logic module engineered for 15V control applications across industrial automation systems. Operating at 50/60Hz with an 8-pin interface, the TR3-4 delivers reliable switching and logic control for legacy and retrofitted manufacturing equipment. This used unit has been fully tested and is ready for deployment in existing control panels or as a replacement component.
Key Features
- 15V nominal operating voltage for low-voltage control circuits
- Dual frequency support (50/60Hz) enables global compatibility
- 8-pin configuration for straightforward integration into panel wiring
- Proven reliability in decades-old industrial control systems
- Compact form factor fits standard DIN rail or panel-mount installations
Technical Specifications
- Input Voltage: 15 VDC/VAC
- Frequency: 50/60Hz
- Pin Configuration: 8-pin
- Module Type: Logic Control Module (Type 11)
- Manufacturer: Farmer Electric Products
- Part Number: TR3-4
- Condition: Used, fully tested and functional
Typical Applications
- Legacy industrial control systems and equipment retrofits
- Machine sequencing and interlocking circuits
- Low-voltage relay logic replacement in manufacturing
- Panel-mount control modules for process automation
- Restoration and repair of vintage industrial machinery
Compatibility & Replacements
Compatible With
- Industrial control panels operating on 15V nominal supply
- Standard 8-pin logic module mounting bases and sockets
- Legacy Farmer Electric control systems and equivalent platforms
- Panel configurations supporting 50/60Hz dual-frequency operation
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator or equipment documentation before ordering. The TR3-4 is a legacy component; confirmation of direct replacements should be obtained from a qualified technician familiar with your specific control system configuration.
Works With
- Vintage relay logic systems and panel builders
- Industrial control systems using low-voltage logic modules
- Equipment supporting 8-pin module form factors
- 50/60Hz dual-frequency control environments










