Putzmeister Spare Parts LIMIT SWITCH 239584009

This limit switch, OEM reference 239584009, is a direct replacement component engineered specifically for Putzmeister concrete pumps and placing booms. It is not a generic aftermarket substitute—this is the factory-specified part for maintaining original machine performance and safety compliance.

The switch provides a standard 1NC + 1NO snap-action contact configuration, offering reliable electrical position feedback for hydraulic circuits and boom sequencing. It supports AC-15 (240V, 3A) and DC-13 (250V, 0.27A) rated loads, making it suitable for both relay and PLC input applications in the harsh electrical environment of mobile concrete equipment.

Housed in a durable plastic body with a Zamak actuator head, this unit is built to withstand the vibration and shock conditions typical of concrete pumping operations. The plunger-type operator features a spring-return roller lever, with a maximum actuation speed rating of 1.5m/s and a repeat accuracy of 0.1mm across 1 million cycles, ensuring precise cut-off points .

The enclosure is rated IP66/IP67, ensuring it is fully protected against dust and capable of withstanding high-pressure washdowns—a critical feature for equipment frequently cleaned after pours. It operates reliably in ambient temperatures ranging from -25°C to +70°C and carries a mechanical durability rating of 10 to 15 million cycles .

Connection is via screw-clamp terminals with a single M16x1.5 cable entry. This part is supplied as a complete unit, with terminals referenced as (13-14) for the NO circuit and (21-22) for NC . Always verify the original limit switch configuration before replacement to ensure correct wiring logic and cam actuation direction.