Stäubli Test Pin MC4-EVO 2 (PV-EVO-PST) – Pin-lock Check

What exactly does this tool do?

• Confirms whether the locking spring (lock) of the MC4-EVO 2 has properly gripped the contact pin.

• Prevents faults caused by incompletely inserted or loose pins.

• Works on cable and coupling connectors of the MC4-EVO 2 type (4–6 mm²).

How to use it (installer)

1. Always work de-energised and never mate/unmate under load.

2. Connector unloaded (preferably disconnected from the mating plug).

3. Insert the test pin into the test opening of the MC4-EVO 2 up to the mechanical stop.

4. Result

   • You feel a clear stop and the pin does not slide in further → the pin is locked.

   • It slides too far inwards or you feel no firm stop → the pin is not locked → open the connector, insert/crimp the pin correctly (again) and check once more.

5. After checking, fully close/screw the connector shut and do a quick pull test on the cable.

Important

• For MC4-EVO 2 only, not suitable for older “classic” MC4s.

• This is not a test probe; it is not intended for voltage/polarity.

• Do not use it to disconnect; “Do not disconnect under load.”

Specifications (brief)

• Type: PV-EVO-PST (Stäubli)

• Compatibility: MC4-EVO 2 cable and coupling connectors, 4–6 mm²

• Function: mechanical lock check of the contact pin