ROSS Controls 1523B4102 EEZ-ON Pressure Switch

ROSS Controls 1523B4102 EEZ-ON L-O-X manual lockout valve with Soft Start is a safety energy-isolation device for pneumatic circuits, designed to prevent accidental re-energization during maintenance. It’s part of the 15 Series L-O-X valves with EEZ-ON Soft Start, with the Y1523B4102 variant described as Classic EEZ-ON featuring a 1/2 in NPT inlet and 3/4 in exhaust, soft-start included. The unit is easily identifiable by its yellow body and blue ON/OFF handle, providing rapid visual indication of lockout status. An integrated 1/8 NPT sensing port is standard on all Series variants, allowing installation of zero-energy verification accessories such as the 988A30 pop-up indicator or a pressure switch (586A86 EN connector or 1153A30 M12) to confirm that energy has been isolated before service. These features support reliable lockout procedures in industrial pneumatic systems and align with ROSS’s EEZ-ON safety philosophy of controlled restart via soft-start sequencing.