Overview
The Allen-Bradley 700-HRF72DA18 is a general-purpose plug-in timing relay designed for precise time-delay control in industrial electrical systems. This dial-type relay features dual-pole, dual-throw (DPDT) timed contacts with an adjustable timing range from 0.05 seconds to 30 hours, making it suitable for equipment startup sequences, motor soft-start applications, and complex automation logic. The relay operates on a 100–240V AC power supply and mounts directly into an 8-pin socket base, allowing for easy installation and replacement in control panels and DIN rail enclosures.
Key Features
- Adjustable timing range: 0.05 seconds to 30 hours
- DPDT (2 Form C) timed contact configuration for flexible control logic
- 100–240V AC coil voltage for broad industrial compatibility
- Plug-in 8-pin base for easy installation and field replacement
- Dial adjustment for precise, operator-friendly timing calibration
- On-delay timing function with power-on trigger and power-off reset
Technical Specifications
The 700-HRF72DA18 is engineered to deliver repeatable timing control in demanding industrial environments. Its compact tube-base design permits both panel-mount and DIN rail installation options. The timing mechanism offers smooth, reliable operation across the full 0.05s–30h range, and the external dial allows intuitive adjustment without internal circuit modifications.
Typical Applications
- Equipment startup and shutdown sequencing
- Motor soft-start and ramp control
- Conveyor and material handling system delays
- Pump priming and drainage cycles
- Alarm and warning signal delays
- Industrial process automation and repeat-cycle control
Compatibility & Replacements
Compatible With
- 8-pin relay socket bases (700-HLB, 700-HLF series)
- DIN rail and panel-mount enclosures
- Standard industrial control circuits operating 100–240V AC
- General-purpose automation and OEM equipment
Replaces / Drop-In Replacement For
The 700-HRF72DA18 is the current model for this timing relay function. Verify compatibility with your system integrator before ordering older or alternative model numbers.
Works With
- 8-pin timing relay sockets and bases
- Standard electromechanical control panels
- Industrial motor control centers (MCCs)
- PLC auxiliary relay modules
