PBL – Photo-Electric Blocking

A reliable solution to ensure safety around light curtains and photoelectric sensors. The Fortress Osbourn PBL (Photo-electric Blocking) is a mechanical blocking device that interrupts the light curtain’s safety signal when a maintenance key is held inside the safeguarded area. This prevents unexpected machine startups until the key is returned.

Benefits of PBL

• No electrical modifications needed – fully mechanical and quick to install.
• Blocks the light curtain’s signal while the key is held by personnel.
• Available with various blocking plates to fit different light curtain models.
• Constructed of 316 stainless steel for long-lasting corrosion resistance.
• Rated for 1,000,000 operations in demanding industrial environments.
• Suitable for temperatures from –25 °C to +80 °C, for indoor and outdoor use.

Applications

• Automation lines and robotic cells
• Machines equipped with light curtains or photoelectric sensors
• Food processing and packaging industries
• Maintenance and cleaning operations requiring machine lockout

Increase worker safety and reduce downtime – Osbourn PBL delivers dependable mechanical safety without programming or electrical changes.