Lockout/tagout

How it is used

Usually called LOTO (LOH-toh). It covers electricity and also stored energy such as compressed air, hydraulic pressure and gravity. You lock out the machine, apply your lock and tag, and verify zero energy before you start work.

Example sentences

1. Follow the lockout/tagout procedure before you change the gripper fingers.

2. During lockout/tagout, each technician puts their own lock on the main switch.

Common collocations

• lockout/tagout procedure
• lock out the machine
• LOTO point
• verify zero energy
• personal padlock

Related terms

• hazardSomething that could cause injury or damage, such as a moving robot arm, a pinch point, a hot surface, high voltage or stored air pressure.
• preventive maintenancePlanned maintenance done at fixed intervals, such as every 5,000 hours or once a year, to keep equipment in good condition and prevent breakdowns.
• emergency stopA red mushroom-shaped button on a yellow background, or the function behind it, that stops a machine as quickly and safely as possible in a dangerous situation.
• risk assessmentA structured review of a machine or task that identifies hazards, estimates how likely and how serious harm could be, and decides which safety measures are needed.
• interlockA safety or control function that prevents a machine from running unless certain conditions are met, for example a door switch that stops the robot when the guard door opens.

This word in other fields

The same English word can have a different meaning in another field:

• lockout/tagout · Electrical & Electronics Engineering
• lockout/tagout · Industrial Engineering & Manufacturing
• lockout/tagout · Chemical Engineering
• lockout/tagout · Oil, Gas & Mining

More terms: Machine and Robot Safety

• guarding
• light curtain
• enabling switch
• protective stop
• collision detection