Allen Bradley Guardmaster - Atlas 5, Heavy Duty Safety Switches The Atlas 5 Range of guard locking switches by Allen Bradley Guardmaster features an optional flexible actuator which reduces minimum operating radius, convenient lid mounted status indication, and 2 possible actuator entry positions - front and end entry. Atlas 5 switches are supplied with a dedicated Atlas actuator. Atlas 5 switches have the power to release 3 sets of contacts: 2N/C 1N/O, which make them ideal for PLC machines. Standards: EN1088, EN 292, EN 60204-01 & EN60947-5-1