For Internal Office Use Only
9.1 SIGNAL MEASURING AT THE DRIVER
CONTROL UNIT
Forward ride: attaining 100% of the final speed:
In order to attain 100% of the final speed in forward ride, the battery minus signal has
to be transferred from the A1:X3:3 contact of the control unit to the drive control
unit
contact A4:X51:11.
Therefore, the contacts A1:X4:4 and A1:X3:3 on the A1 are connected. This link
initiates transfer of the battery minus signal from A1:X4:4 contact to the A1:X3:3
contact. Before these transfers may happen, the battery plus signal has to be
transferred via the direction switch S7 to the control unit A1.
Information about drive direction to A1:
The S7 drive direction switch is connected to the control unit at the A1:X8:9 and
A1:X8:10 contacts. This link allows transfer of the information about the selected
drive direction (forward or reverse) to the control unit. This transfer only works if
the drive rheostat switch S8 has closed such that the battery plus signal can be
transferred to the control unit.
Then
the A1:X4:4 and A1:X3:3 contacts on A1 are connected in forward ride
(= 100% of the max. speed)
and
re-opened in reverse ride
(= 50% of the max. speed).
