Dwyer CBAS - Manual (Page 2)

Operation Principle
The CBAS is typically installed in pairs on both sides of the belt
and positioned 1-6 feet from the head or tail pulley.
The touch roller is deflected by the deviation of the conveyor belt
from a vertical position to 75 degrees, and when the deviation is
restored, a spring will return the touch roller to the vertical
position when the belt is realigned. Cams are preset to turn on
or off the micro switches when the touch roller is deflected. When
the touch roller deviates 20 degrees the first micro switch will
change state, and when the touch roller is deviated 35 degrees
the second micro switch will change state.
Detection (Standard 1C X 2 Output)
* Switching frequency: 20 times/min.
• Number of contact: 1C x 2 output.
TERMINAL NO. TERMINAL NO. TERMINAL NO.
33°
0°
35°(OFF)
2
6
4
5
3
1
18˝ 20˝(ON)
TOUCH ROLLER
INSULATING PLATES
CASING
PACKING
CAMS
SPRING
3/4˝ FNPT CONNECTION
MICROSWITCHES
MAX. SLANT ANGLE 75°
Fig. 1 Construction of CBAS
PC-CBAS:TEMPLATE 3/3/11 3:08 PM Page 2