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CN20, CN34 SERIES DAMPER ACTUATOR FOR MODULATING AND FLOATING CONTROL
Voltage/Current Control Signal Selection Dip Switch
In its default shipping position, the voltage/current control
signal dip switch (see Fig. 7) is set to OFF (= voltage control).
as shown in Fig. 7. Setting it to ON results in current control
4...20mA.
Position Indication
The hub adapter indicates the rotation angle position by
means of the rotational angle scales (0...90° / 90...0°).
Fig.8. Position indication
Manual Adjustment
IMPORTANT
In order to prevent equipment damage, you must
remove power set the rotation direction switch to the
"Service/Off before manual adjustment.
After removing power or setting the rotation direction switch to
the "Service/Off" position, the gear train can be disengaged
using the declutch button, permitting the actuator shaft to be
manually rotated to any position. The feedback signal will
then follow the new position.
Limitation of Rotation Stroke
Two mechanical end limits (adjustable in 5° increments) are
provided to limit the angle of rotation as desired (see Fig.9).
Fig.9. Mechanical end limits
The mechanical end limits must be securely fastened in place.
It is important that they properly mesh with the rotational
angle scales when the screws are tightened.
Internal End Switches
NOTE: Applicable to models with internal switches only.
The internal end switches are set to change from "common"
to "normally open" at angles of 5° and 85°, respectively, from
the totally counterclockwise position.
actuator scale: clockwise
- 2 .5
0
5
10
CCW internal
end switch
0
5
10
actuator scale: counterclockwise
92.5
90
85
80
Fig. 10. Internal end switches
INSTALLATION
These actuators are designed for single-point mounting.
IMPORTANT
In order to prevent equipment damage, you must
remove power or set the rotation direction switch to the
"Service/Off" position before manual operation.
Mounting Instructions
All information and steps are included in the installation
instructions supplied with the actuator.
Mounting Position
The actuators can be mounted in any desired orientation (no
IP54 if mounted upside down; see Fig.11). Choose an
orientation permitting easy access to the actuator's cables
and controls.
IP54
IP54
Fig. 11. Mounting for IP54
Mounting Bracket and Screws
If the actuator is to be mounted directly on a damper shaft,
use the mounting bracket and screws included in the delivery
package.
Self-Centering Shaft Adapter
The self-centering shaft adapter can be used for shafts
having various diameters (10...27 mm [3/8...1-1/16"]) and
shapes (square or round).
In the case of short shafts, the shaft adapter may be reversed
and mounted on the duct side.
5
15
75
80
85
CW internal
end switch
end switch scale
15
75
80
85
75
15
10
IP54
IP54
EN0B-0341CH33 R0803A
90
92.5
90
5
0
- 2 .5
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