IAI America SCON-C - Manual (Page 38)

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[15] Absolute battery connector
This connector is used to connect the absolute-encoder backup battery (required when the controller is of
absolute encoder specification).
[16] Absolute battery holder
This battery holder is used to install the absolute-encoder backup battery.
[17] Grounding screw
This screw is used to implement protective grounding. It is connected inside the controller to the PE
terminal in the power connector. Use this terminal if protective grounding based on a 2-piece connector is
not feasible due to conflict with the safety standard or for any other reason.
Item Description
Cable size 2.0 to 5.5 mm 2 or larger
Grounding method Class D grounding