CONTREX CX-1200 - Manual (Page 23)

Page 21
Figure 2-30 Phase Retard
Phase Retard
10
8
J7
DI-15
Com
Phase Retard
(J7 pins 10, 8)
Digital Input 15
Phase Retard is a maintained input. When it is closed it
increments the CP selected by "Remote Scroll" (CP-400) at the
rate set by "Rmt Scroll Rate" (CP-401). As a maintained input,
Phase Retard is only active when the operator device is closed.