A-B 800H-TFRXT6A4 Push Button Assembly

The Allen-Bradley 800H-TFRXT6A4 is a 30 mm industrial emergency stop / push-pull operator from the 800H push button series, designed for machine safety and control panel applications.

Product Information

• Brand: Allen-Bradley (Rockwell Automation)
• Series: 800H
• Part Number: 800H-TFRXT6A4
• Type: Emergency Stop / Push-Pull Push Button Assembly
• Operation: 2-position maintained, twist-to-release
• Mounting Size: 30.5 mm panel cutout
• Head Type: Red mushroom head (plastic)
• Contact Configuration: 2 NC (normally closed) safety contacts

Key Electrical & Mechanical Data

• Rated voltage (contact block): up to 600V AC / DC (depending configuration)
• Rated current: up to 10A AC (AC-15 duty)
• Protection rating: NEMA 4 / 4X / 13 (industrial / washdown / dust protection)
• Mechanical life: up to 250,000 cycles
• Electrical life: up to 1,000,000 cycles (at rated load)
• Operation type: twist release (prevents accidental reset)

Function (Simple Explanation)

This device is a safety emergency stop button:

• Press button → machine immediately stops via safety circuit
• Button stays locked (maintained state)
• Twist to release → restores system after fault is cleared

It is designed for operator safety, not normal signal switching.

System Role

It is used in safety circuits, typically connected to:

• Safety relay modules
• Safety PLC inputs
• Motor contactor control circuits

It ensures machines cannot restart until manually reset.

Typical Applications

• CNC machine emergency stop
• Production line safety shutdown
• Robotic cell safety control
• Packaging machinery
• Industrial control panels
• Conveyor emergency stop systems

Key Features

• High visibility red mushroom head
• Twist-to-release safety mechanism
• Dual NC contacts for redundant safety circuits
• Rugged industrial construction
• NEMA 4X protection for harsh environments
• Compatible with Rockwell 800H control stations

Precautions

• Must be wired into a safety-rated circuit (not standard PLC input only)
• Do not bypass NC safety contacts
• Correct panel cutout (30.5 mm) required
• Contact blocks must match correct configuration
• Ensure proper safety category design (ISO 13849 / IEC 60204 systems