Locking Ring Power Connector
Many MicroTouch products employ a locking ring to the DC power input. This helps to prevent accidental disconnects of the power supply
What products this is available on
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Center Pin: 2.0 mm
Barrel length: 5.7mm
Ring: M8
Vendors: Kycon KLDLX-P-202-A-M8-ND

(This list is constantly being updated)
This locking ring configuration is used on the following products:
IC -156P-AA2
IC-215P-AA2
DT-100P-A1
DT-156P-A1
DT-215P-A1