Leuze electronic Pizzato NS safety switches

The Pizzato NS series of safety switches make it possible to create circuits with maximum PLe and SIL3 safety levels by installing just one device on the machine. This avoids expensive additional wiring and allows for quicker installation.

The series has two electronic safety outputs that must be connected to a safety module with OSSD inputs or to a safety PLC. The series offers optional multiple connections (daisy chain), for up to a maximum number of 32 devices, while maintaining the maximum PLe safety level. LEDs are displayed on the front face, providing visible diagnostics.

The switches are used on machines where hazardous conditions remain for an extended duration, even after the machines have been switched off — eg, the mechanical inertia of pulleys, saw blades, parts under pressure or high temperatures — and when it is necessary to control machine guards (allowing the opening of protections only under specific conditions). They also have IP67 and IP69K protection ratings for tough environmental conditions.

The safety switch is equipped with a large hole for centring the actuator’s pin. This makes it easier to align the actuator and the hole on the head of the switch during the assembly phase, which is helpful for off-axis doors.

The top module of the switch incorporates the release device mechanism and the lower module includes the connection outputs. The modules can be rotated in 90° steps, thereby facilitating different mounting combinations.