What is a Category 2 stop?

Category 2 is a controlled stop with power left available to the machine actuators. An example of this category is a normal production stop in which the machine is brought to a stop and power is available to start at any point.

What are the five requirements of an E-stop device?

The E-stop must have positive operation.

What is a category 0 stop?

Stop Category 0: Stopping by immediate removal of power to the machine actuators (i.e. an uncontrolled stop – stopping of machine motion by removing electrical power to the machine actuators)

What is stop category?

A stop category is a description of a control function – what the control does – and not the architecture of the system that provides the function. Stop categories are often confused with circuit or system architecture categories from EN 954-1[1] and ISO 13849-1 [2].

What should an e-Stop do?

The E-Stop function in the equipment should provide a single action to bring the equipment to a safe state, generally by disconnection of the power or perhaps by applying a braking mechanism and should be clearly visible and easily accessible.

Can you guard an e-stop?

However, any kind of guarding is prohibited on an estop. The ANSI B11. 19-2010 12.9. 2.1f states that “the emergency stop device shall remain unguarded”.

Can E stops be guarded?

Finally keep in mind, emergency stop devices are not safe guarding devices, they are complementary to guards and other safeguarding methods and cannot be the single source of protection on a machine.

Where should an emergency stop be located?

4.4. 2 An emergency stop device shall be located at each operator control station, except where the risk assessment indicates that this is not necessary, as well as at other locations, as determined by the risk assessment.