Ewellix CAHB-20E, Installation, Operation And Maintenance Manual

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CAHB -20 s eries
4.4 Construction group
description
Motor
The motor is a brushed DC motor, 12 or 24 V DC. The mo-
tor’s shaft is connected to a helical gear. The lift speed de-
pends on the load. The motor unit is surrounded by metal
housing and equipped by a EMC filter. The metal housing
cannot be opened.
Gear unit
The helical gear is directly powered by the motor shaft. Gear
unit is connected to the over load clutch that moves the drive
screw system.
Linear unit
The linear unit is surrounded and protected by the guiding
tube. The linear unit of the CAHB-21E or CAHB-22E is
equipped by brake. The push tube of the actuator is con-
nected to the nut of the drive screw unit and aligned by the
guiding tube.
4.5 Connection
Fig. 10
1
CAHB-2… connections
1. Wires to connect actuator to power supply or to an exter-
nal control.
4.6 Options
If not specified otherwise, the options listed below are avail-
able for the entire series of CAHB-2… linear actuators.
4.6.1 Limit switch
The limit switch makes it possible to control the stroke of the
linear unit by internal setting. Contact the Ewellix to adjust
the setting of limit switch.
Remark: Limit switch is not available for CAHB-20
4.6.2 Potentiometer
The potentiometer provides a signal indicating the position
of the linear actuator. The electrical specification as on the
datasheet.
• Linear actuator with potentiometer unit: colours of wire are
white, green and brown (⮑ Fig. 11).
Retract Extend
Green
Brown
White
POT
Limit + POT:
White Green Brown
0 CW 10K
Fig. 11
Potentiometer