ROBUS PROTON UNIVERSAL 360 PIR

The ROBUS PROTON UNIVERSAL 360° PIR sensor (RU360-01) is a typical ceiling mountable PIR motion sensor intended for indoor lighting applications sold in the Australian and EU markets.

Alternate re-brands (OEM unknown)


 * MATelec FMS-12080

Causes

 * Film capacitor in the 'capacitive dropper' power supply has degraded and no longer passes enough current for the device to operate correctly.

Solutions

 * Replace both X2 film capacitors (C29 & C30)

Disassembly Notes

 * Front bezel quarter turn to remove and expose controls
 * 4 self tapping screws hold enclosure together, PH2 bit size
 * 3 plastic clips hold enclosure onto surface mounting plate
 * Ensure potentiometers are correctly aligned with plastic knobs during re-assembly

Main PCB (only one)
No model numbers or board revisions visible

Replacement Parts
The replacement Vishay 339 series film capacitors have higher ratings and should be expected to last far longer than the original capacitors.

If parts are not available or different selection is preferred, you can use the values in the Original Parts section to perform a parametric search

Related Links

 * ROBUS PIR Motion Sensor Repair & Failure Analysis - WizardTim (YouTube)