Hitachi PRIMAIDE Instruction Manual page 29

(14) Input/output (e-Line common contacts):
BUSY OUT (level), ERROR IN (level), ERROR OUT (level),
START IN (level)
(15) Terminal blocks:
START IN (connected with e-Line contact)
START OUT (connected with e-Line contact)
BUSY OUT (connected with e-Line contact)
AUX OUT (fraction marker signal)
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3.2