Overview
The Allen-Bradley 700-FSA3CU23 is a high-performance electronic timing relay part of the 700-FS series. This on-delay relay is engineered for precise time-delay switching in industrial automation and control systems. It operates across a wide voltage range (24–240VAC / 24–48VDC) and mounts directly to standard DIN rail, making it an efficient drop-in solution for cabinet retrofits and new machine builds.
Key Features
- On-Delay Operation: Output contact changes state after the user-adjustable time delay completes.
- Wide Voltage Support: Accepts 24–48V DC or 24–240V AC at 50/60 Hz, eliminating the need for separate models.
- Adjustable Timing: 0.5–10 second time-delay range covers most standard automation timing requirements.
- Single Changeover Contact (SPDT): One 1 C/O contact provides flexibility for energize-on-delay or de-energize logic.
- DIN Rail Mounting: Compact form factor fits standard control cabinet layouts.
- Industrial Certifications: Meets UL, CE, CCC, and marine standards for global deployment.
Technical Specifications
- Control Voltage: 24–48V DC / 24–240V AC @ 50/60 Hz
- Operating Mode: On-Delay
- Contact Configuration: SPDT (1 Changeover)
- Timing Range: 0.5–10 seconds (user-adjustable)
- Mounting Type: DIN Rail
- Weight: 0.24 lbs (0.11 kg)
- Certifications: UL, CE, CCC, MARINE
- Series: 700-FS High Performance Timing Relay
Typical Applications
- Motor soft-start and pump priming delay circuits
- Conveyor startup sequencing and brake release timing
- Compressor unload valve time delay after shutdown
- Panel heater warm-up cycle control
- Process equipment startup interlocks and safeguards
- General logic and gate timing in discrete control systems
Compatibility & Replacements
Compatible With
- Allen-Bradley control cabinets and switchboards
- Industrial automation panels with 24V or 240V control power
- Single-phase and three-phase motor control circuits
- Discrete logic circuits and hardwired control systems
- DIN rail terminal blocks and standard rail enclosures
Replaces / Drop-In Replacement For
The 700-FSA3CU23 is part of the 700-FS series. Contact your system integrator or consult Rockwell Automation literature for verified replacement compatibility with older or variant models in the 700-F product family.
Works With
- Hardwired control logic (no software required)
- Allen-Bradley discrete I/O modules and control relays
- Standard industrial 50/60 Hz power systems
- DIN rail mounting infrastructure and standard enclosures


















