Optimus

 
PO_26V_RE
 
+ 26 V reverse supply
EWAW11 - EWAW12 - EWAX1/2/3/4:4 - EWAX42:1
if generator and system release voltages don't match
normal condition: PO_26V_RE = +26V of generator against ground (jumper WA W11 + W13 closed, W12 open)
special condition: PO_26_RE = 0V against -24V, supply from stand (jumper WA W11 + W13 open, W12 closed)