Honeywell N20230, N34230, N3424, N2024 PRODUCT DATA

DAMPER ACTUATORS 20/34 Nm (177/300 lb-in)

FOR FLOATING / 2-POSITION CONTROL

GENERAL

These direct-coupled damper actuators provide two-position
and floating control for:

• air dampers,

• VAV units,

• air handlers,

• ventilation flaps,

• louvers, and

• reliable control for air damper applications with up to

FEATURES

• New self-centering shaft adapter

• Access cover to facilitate connectivity

• Declutch for manual adjustment

• Mechanical end limits

• Field-installable auxiliary switches

• Rotation direction selectable by switch

• Mountable in any orientation (no IP54 if upside down)

• Mechanical position indicator

2

4.6 m

/ 50 sq.ft. (20 Nm / 177 lb-in) or 7.8 m2 / 85 sq. ft.
(34 Nm / 300 lb-in) (seal-less dampers; air friction­dependent).

N2024 / N20230
N3424 / N34230

PRODUCT DATA

SPECIFICATIONS

Supply voltage

N2024 / N3424 24 Vac ±15%, 50/60 Hz
N20230/N34230 230 Vac ±15%, 50/60 Hz

Nominal voltage

N2024 / N3424 24 Vac, 50/60 Hz
N20230/N34230 230 Vac, 50/60 Hz

All values stated hereinafter apply to operation under
nominal voltage conditions.

Power consumption

N2024 6 VA / 6 W
N20230 8 VA / 8 W
N3424 9 VA / 9 W
N34230 13 VA / 10 W

Ambient limits

Ambient operating limits -20...+60 °C (-5...+140 °F)
Ambient storage limits -40...+80 °C (-40...+175 °F)
Relative humidity 5...95%, non-condensing

Safety

Protection standard IP54 as per EN 60529
Protection class II as per EN 60730-1
Overvoltage category III

Lifetime

Full strokes 60000
Repositions 1.5 million

Mounting

Round damper shaft 10...27 mm (3/8...1-1/16")
Square damper shaft 10...18 mm (3/8...11/16");
45° steps
Shaft length min. 22 mm (7/8")

End switches (when included)

Rating 5 A (resistive) / 3 A (inductive)
Triggering points 5° / 85°
Torque rating
N2024 / N20230 20 Nm (177 lb-in)
N3424 / N34230 34 Nm (300 lb-in)

Runtime 110 sec (50 Hz) / 95 sec (60 Hz)
Rotation stroke 95° ± 3°
Dimensions see "Dimensions" on page 8
Weight (without cables) 1.45 kg (3 lbs. 3 oz.)
Noise rating 40 dB(A) max. at 1 m

® U.S. Registered Trademark EN0B-0320GE51 R0409
Copyright © 2009 Honeywell Inc. • All rights reserved

SmartAct N2024 / N20230, N3424 / N34230

MODELS

order number supply voltage end switches feedback power consumption torque

N2024 / N2024-2POS 24 Vac -- --

N2024-SW2 24 Vac 2 --

N2024-P10K 24 Vac -- 10 kΩ

N20230 / N20230-2POS 230 Vac -- --

N20230-SW2 230 Vac 2 --

N20230-P10K 230 Vac -- 10 kΩ

N3424 24 Vac -- -- 9 VA / 9 W

N34230 230 Vac -- -- 13 VA / 10 W

Product Identification System

N = non-spring return
S = spring return

20 = 20 Nm (177 lb-in)
34 = 34 Nm (300 lb-in)

010 = modulating

24 = 24 V floating+ON/OFF

230 = 230 V floating+ON/OFF

6 VA / 6 W

20 Nm

(177 lb-in)

8 VA / 8 W

34 Nm

(300 lb-in)

SmartAct

OPERATION / FUNCTIONS

1

60

90

90

60

30

0

2

3

4

5

6

7

Fig. 2. Setting units and control elements

30

0

N

0

2

Fig. 1. Product Identification System

X

320

Legend for Fig. 2:

1 Self-centering shaft adapter
2 Retainer clip
3 Rotational angle scales (0...90° / 90...0°)
4 Mechanical end limits (20 Nm [177 lb-in] models, only)
5 Declutch button
6 Anti-rotation bracket
7 Rotation direction switch
8 Access cover

Contents of Package

The delivery package includes the actuator itself, parts 1
through 8 (see Fig. 2), the anti-rotation bracket screws, and
the SM mounting plate and screws.

Rotary Movement

The rotation direction (clockwise or counterclockwise) can be
selected using the rotation direction switch (see part 7 in Fig.

2), thus eliminating the need to re-wire. To ensure tight
closing of the dampers, the actuator has a total rotation stroke

8

of 95°.

As soon as operating power is applied, the actuator may start
to run. When power is removed, the actuator remains in
position. For actuator-controller wiring instructions, see
section "Wiring" on page 7.

EN0B-0320GE51 R0409 2

Rotation Direction Switch

SmartAct N2024 / N20230, N3424 / N34230

90 90

60

60

Dir

Service/Off

Rev

Fig. 3. Rotation Direction Switch

• Dir ("

") is the default shipping position. When the
rotation direction switch is set to this position, the actuator
internally switches the rotation direction control signals as
stated in section "Wiring Diagrams" on pages 5 and 6.

• "Service/Off": When the rotation direction switch is set to
this position, all actuator rotary movement is cancelled
and all control signals are ignored, thus enabling the
actuator to be manually operated (see section "Manual
Adjustment"). The user can then perform maintenance /
commissioning without having to remove power from the
actuator. To return to the control mode, simply move the
rotation direction switch to its former setting.

• Rev ("

"): When the rotation direction switch is set to this
position, the actuator follows signals as stated in section
"Wiring Diagrams" on pages 5 and 6.

Two-Position or Floating Control

The actuator is capable of being operated by either a two­position (open/close) or (unless explicitly identified as a 2­POS model) a floating (three-wire) controller. Refer to wiring
diagrams for correct connection.

Feedback Signal

Actuators equipped with a feedback potentiometer provide
position feedback via the potentiometer resistance value (see
Fig. 4).

30

30

00

Fig. 5. Position indication

Manual Adjustment

IMPORTANT

To prevent equipment damage, you must remove
power or set the rotation direction switch to the
"Service/Off" position 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 adjustable mechanical end limits (20 Nm [177 lb-in]
models, only) are provided to limit the angle of rotation as
desired (see Fig. 6).

ENSURE
PROPER
MESHING
OF TEETH

P3

totally CCW

totally CW

= max.

totally CCW

= 0

Ω

Ω

= 0

Ω

P2

totally CW

= max.

P1

10 k

Ω

Ω

Fig. 4. Feedback signal settings

If, while the actuator is not rotating, the user declutches it and
manually repositions the shaft adapter, the feedback signal
will then follow the new position at which the shaft adapter
has been left.

Position Indication

The hub adapter indicates the rotation angle position by
means of the rotational angle scales (0...90° / 90...0°)
provided in the actuator plate (see Fig. 5).

3 EN0B-0320GE51 R0409

The mechanical end limits must be securely fastened in place
as shown in Fig. 7. Specifically, it is important that they
properly mesh with the rotational angle scales when the
screws are tightened.

Fig. 6. Mechanical end limits

SmartAct N2024 / N20230, N3424 / N34230

85°80

5°90°0°92.5°5°10°15

CORRECT INCORRECT

CORRECT INCORRECT

Fig. 7. Correct / incorrect tightening of end limits

Internal End Switches

NOTE: Only those actuators for which "-SW2" has been

specified when ordering (e.g.: "N2024-SW2") feature
internal end switches.

The internal end switches are set to switch from "common" to
"normally open" at angles of 5° and 85°, respectively, from the
totally counterclockwise position.

actuator scale: clockwise

5° 10° 15° 92.5°0° 90°-2.5° 85°80°75°

CCW internal

end switch

end switch scale

5° 10° 15°0° 90°85°80°75°

actuator scale: counterclockwise

°75°-2.

Fig. 8. Internal end switch triggering points

°

CW internal

end switch

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 position (no IP54 if
mounted upside down; see Fig. 9). Choose a mounting posi­tion permitting easy access to the actuator's cables and
controls.

IP54 IP54IP54 IP54

Fig. 9. 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.

Stroke Limitation with Mechanical End Limits

The mechanical end limits (20 Nm [177 lb-in] models, only)
enable the stroke to be limited from 0...90° in increments of
3°.

EN0B-0320GE51 R0409 4

SmartAct N2024 / N20230, N3424 / N34230

Wiring Diagrams

N2024 / N2024-2POS / N3424

rotation

direction

3

3

TERMINAL STRIP 1

switch

2

24 Vac~

24 V

!

2

1

1

Connect via safety

isolating transformer!

TWO-POSITION CONTROL

Dir

Service/Off

Rev

M

~

24 Vac~

24 V

!

isolating transformer!

FLOATING CONTROL

(not applicable to N2024-2POS)

N2024-SW2

rotation

direction

3

3

TERMINAL STRIP 1

END SWITCHES

switch

2

24 Vac~

24 V

!

2

1

1

Connect via safety

isolating transformer!

TWO-POSITION CONTROL

Dir

Service/Off

Rev

M

~

24 Vac~

24 V

!

isolating transformer!

FLOATING CONTROL

NOTE: Internal end switches S1 and S4 must be connected to the same power source.

N2024-P10K

rotation

direction

3

3

TERMINAL STRIP 1

FEEDBACK POTENTIOMETER

switch

2

24 Vac~

24 V

!

2

1

1

Connect via safety

isolating transformer!

TWO-POSITION CONTROL

Dir

Service/Off

Rev

M

~

24 Vac~

24 V

!

isolating transformer!

FLOATING CONTROL

connecting cable terminal

supply and signal lines

(must be equipped with spark suppressors)

1 24 Vac ⊥ 24 Vac ⊥
2 24 Vac (clockwise) 24 Vac ∼
3 24 Vac (counterclockwise) 24 Vac control signal

S1 common

CCW (left) 5°

end switches

(when included)

CW (right) 85°

S2 normally closed
S3 normally open
S4 common
S5 normally closed
S6 normally open
P1 full clockwise

feedback potentiometer

P2 signal
P3 full counterclockwise

rotation

direction

3

3

switch

2

2

1

1

Connect via safety

rotation

direction

3

3

switch

2

2

1

1

Connect via safety

rotation

direction

3

3

switch

2

2

1

1

Connect via safety

floating two-position

Dir

Service/Off

Rev

Dir

Service/Off

Rev

Dir

Service/Off

Rev

name

M

~

S1

S1

S2

M

~

END SWITCHES

M

~

totally CCW

= max.

totally CCW

S2

S3

S3

S4

S4

S5

S5

S6

S6

P3

totally CW

Ω

Ω

= 0

P2

totally CW

Ω

= 0

POTENTIOMETER

= max.

P1

FEEDBACK

Ω

Ω

10 k

5 EN0B-0320GE51 R0409

SmartAct N2024 / N20230, N3424 / N34230

N20230 / N20230-2POS / N34230

rotation

3

3

direction

switch

2

230 Vac~

2

Dir

Service/Off

Rev

rotation

3

3

direction

switch

2

M

~

230 Vac~

2

Dir

Service/Off

Rev

M

~

TERMINAL STRIP 1

1

230 V

!

1

Connect via safety switch/connector

for all-pole disconnection > 3 mm!

TWO-POSITION CONTROL

230 V

!

1

1

Connect via safety switch/connector

for all-pole disconnection > 3 mm!

FLOATING CONTROL

(not applicable to N20230-2POS)

N20230-SW2

TERMINAL STRIP 1

END SWITCHES

rotation

direction

3

3

switch

Service/Off

230 Vac~

230 V

!

2

2

1

1

Connect via safety switch/connector

for all-pole disconnection > 3 mm!

TWO-POSITION CONTROL

Rev

Dir

M

~

230 Vac~

230 V

!

FLOATING CONTROL

rotation

direction

3

3

switch

2

2

1

1

Connect via safety switch/connector

for all-pole disconnection > 3 mm!

NOTE: Internal end switches S1 and S4 must be connected to the same power source.

N20230-P10K

TERMINAL STRIP 1

FEEDBACK POTENTIOMETER

rotation

direction

3

3

switch

Service/Off

230 Vac~

230 V

!

2

2

1

1

Connect via safety switch/connector

for all-pole disconnection > 3 mm!

TWO-POSITION CONTROL

Rev

Dir

M

~

230 Vac~

230 V

!

FLOATING CONTROL

rotation

direction

3

3

switch

2

2

1

1

Connect via safety switch/connector

for all-pole disconnection > 3 mm!

connecting cable terminal

supply and signal lines

(must be equipped with spark suppressors)

1 230 Vac ⊥ 230 Vac ⊥
2 230 Vac (clockwise) 230 Vac ∼
3 230 Vac (counterclockwise) 230 Vac control signal

floating two-position

S1 common

CCW (left) 5°

end switches

(when included)

CW (right) 85°

S2 normally closed
S3 normally open
S4 common
S5 normally closed
S6 normally open
P1 full clockwise

feedback potentiometer

P2 signal
P3 full counterclockwise

Dir

Service/Off

Rev

Dir

Service/Off

Rev

name

S1

S1

S2

M

~

END SWITCHES

M

~

totally CCW

totally CCW

S2

S3

S3

S4

S4

S5

S5

S6

S6

P3

totally CW

= max.

= 0

Ω

P2

totally CW

Ω

= 0

= max.

P1

FEEDBACK

POTENTIOMETER

Ω

Ω

10 k

Ω

EN0B-0320GE51 R0409 6

Wiring

Connecting to the Power Supply

In order to comply with protection class II, the power source of
24 V actuators must be reliably separated from the network
power supply circuits as per DIN VDE 0106, part 101.

Access Cover

To facilitate wiring the actuator to the controller, the access
cover can be detached from the actuator.

IMPORTANT

Remove power before detaching the access cover.
Once the access cover has been removed, please
take care to avoid damaging any of the parts now
accessible.

SmartAct N2024 / N20230, N3424 / N34230

S3

A
B

A

B

S6
S1
S2

0

90

C

S4

D

45

S5

90

0

C

D

The internal auxiliary switches are field-installable parts
providing two SPDT freely-adjustable switches.

Access Cover Kit

Order no.: WB20
For M20 outlets.
Contains:

• 1 access cover (with screw)

• 2 cable connectors

• 2 dust-protection caps

SPARE PARTS

Fig. 10. Access cover (N2024-SW2)

Depending upon the model, the access cover may have one
or two terminal strips, including a layout with a description for
each of the terminals.

Fig. 11. N2024-SW2 with access cover removed

OPTIONAL ACCESSORIES

The following optional accessories can be ordered separately.

Auxiliary Switch Kit

Order no.: SW2

Spare Parts Kit

Order no.: A7209.2071
The spare parts kit contains the following items:

• Anti-rotation bracket and screws

• SM Mounting plate and screws

• Access cover screw

• Plastic protective cap for protection standard IP54

• Mechanical end limit screw and retainer

Anti-Rotation Bracket Kit

Order no.: A7209.2073
The anti-rotation bracket kit can be ordered separately.

Contains:

• 10 anti-rotation brackets

• 20 screws

SM Mounting Plate Kit

Order no.: A7209.2072
The SM mounting plate kit can be ordered separately.

Contains:

• 10 SM mounting plates

• 20 screws

7 EN0B-0320GE51 R0409

SmartAct N2024 / N20230, N3424 / N34230

DIMENSIONS

100 mm (3-15/16”)

shaft

adapter

min. 60 mm (2-3/8”)

adapter (reverse)

20.6 mm
(1-3/16”)

shaft

223 mm (8-25/32”)

48 mm

(1-7/8”)

95°

90

60

30

0

92 mm (3-5/8”)

1000 mm (39”)

132 mm (5-3/16”)

230 mm [+/- 0.5 mm] (9-1/16” [+/-1/64”])

20 mm (25/32”)

2 mm (5/64”)

13 mm (1/2”)

7 mm (9/32”)

5 mm (+0.05, -0.10 mm)

25/128” (+0.002, -0.004”)

anti-rotation bracket

Manufactured for and on behalf of the Environmental and Combustion Controls Division of Honeywell Technologies Sàrl, Rolle, Z.A. La Pièce 16, Switzerland by its Authorized Representative:

Automation and Control Solutions

Honeywell GmbH
Böblinger Strasse 17
71101 Schönaich / Germany
Phone: [phone]
Fax: [phone]
http://ecc.emea.honeywell.com
Subject to change without notice. Printed in Germany

EN0B-0320GE51 R0409