The Oper-switch, limit steel roller plunger, identified by part number 30348130, is a fundamental electrical safety and control component designed for operator protection on SCHWING concrete pumps.

⚠️ Critical Safety Function (Hopper Grate)

This switch is specifically dedicated to monitoring the position of the safety grate (hopper grate) and does not control the main pumping stroke. It performs a vital safety interlock function:

• Position Detection: The switch's steel roller plunger is strategically mounted to be actuated every time the hopper safety grate is opened or lifted.

• Safety Interlock: Upon activation (grate open), the switch sends a signal to the equipment's control unit. This signal, which acts in conjunction with the Emergency Stop (E-Stop) circuit, immediately shuts down the pump operation and the agitator (mixer).

• Injury Prevention: Its primary purpose is to prevent the user from placing their hand or arm inside an active, moving pumping or mixing system, protecting against severe accidents when the grate is opened.

Details and Application

• Manufacturer: SCHWING (OEM Part)

• Part Number (OEM NO.): 30348130

• Actuator: Steel Roller Plunger. This robust design is necessary to withstand direct contact and the harsh environmental conditions near the hopper.

• Device Type: Limit Switch / Safety Interlock Sensor (Essential Personnel Protection Device).

This switch is the electrical safety barrier that ensures compliance with safety regulations when working near the hopper. A failure in the #30348130 Switch directly compromises operator protection.