12
CAHB -1 0 s eries
4.5 Features
If not specified otherwise, the options listed below are avail-
able for the entire series of CAHB-10 linear actuators
4.5.1 Limit switch
The limit switch makes it possible to control the stroke of the
linear unit by internal setting.
4.5.2 Potentiometer
The potentiometer provides a signal indicating the postion of
the linear actuator.
There is one type of setting for the potentiometer wire.
• Linear actuator with potentiometer unit: colours of wire are
white, purple and yellow (⮑ Fig. 5).
Retract
Extend
Purple
Yellow
White
White
Purple
Yellow
CW
Fig. 5
Potentiometer
4.5.3 Thermal switch
The thermal switch in the motor controls thermal overload by
switching off the motor in an emergency.
CAUTION
To prevent damage from overheating, do not try to operate actuator
until its temperature has fallen below the threshold for the switch to
operate.
4.5.4 2-Hall encoder (optional)
The 2-Hall encoder provides a signal indicating the position
of the linear actuator.
It is equipped with 2 Hall effect sensors 45° electrically
shifted.
They are integrated on a PCB and read a 4 poles magnetic
ring.
Hall sensors have an open collector output.
Hall sensors shall provide two signal outputs with the follow-
ing characteristics:
4.5.5 Absolute analog position output
The absolute analog position sensor is a multitude non-con-
tact magnetic sensor. It provides a signal indicating the po-
sition of the linear actuator. the output signal is 0 ~ 5V DC
voltage (current output 5 mA max). The electrical specifica-
tion and resolution refer to date sheet, the wires connecting
refer to connecting diagram chapter.
output (V)
5
4,5
0,5
0
resolution
tan ( ) = output relatio n to
displacement ( V/mm)
displacement ( mm)
Fig. 7
Fig. 6
0
0.8
0.6
0.4
0.2
1
A
B
0
0.8
0.6
0.4
0.2
1
Duty
cycle
Encoder signal
Time [s]
Time [s]
Phase
