fghj
15
CBX
fig 5
Pickup board
The pickup board for the drum is used to transfer power and communication signals to
the cable drum. It also decodes the movement of the cable drum using sensors.
The pickup board is mounted on a spring loaded lever arm.
fig 6
Axle board
The axle board mounted on the cable drum is powered by contact free power
(inductive) from the pickup board. It communicates with the main board via the pickup
board and it communicates with the sensor through an optical RS-‐485 interface.
fig 7
Sensor
The sensor is connected to a cable that supplies it with power and transmits the
communication signals. The sensor contains a near-‐infrared light source and a receiver
that are positioned in such a way that the light passes through the liquid.
fig 8
