Honeywell N20, CN7220A2007, CN7234A2008, N34 Product Data

N20, N34 SERIES

NON-SPRING RETURN DAMPER ACTUATOR
20/34 Nm (177/300 lb-in) FOR MODULATING CONTROL

GENERAL

These direct-coupled damper actuators provide modulating
control for:

• Air dampers

• VAV units

• Air handlers

• Ventilation flaps

• Louvers, and

• Reliable control for air damper applications with up to

2

/ 50 sq.ft. (20 Nm / 177 lb-in) or 7.8m2 / 85 sq.

4.6m
ft. (34 Nm / 300 lb-in)(seal- less damper blades; air

friction-dependent)

FEATURES

• New self-centering shaft adapter

• Access cover to facilitate connectivity

• Declutch for manual adjustment

• Mechanical end limits (CN7220 only)

• Field-installable auxiliary switches

• Rotation direction selectable by switch

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

• Mechanical position indicator

SPECIFICATIONS

Supply voltage 24 Vac ±20%, 50/60 Hz;

Nominal voltage 24 Vac, 50/60 Hz; 24 Vdc

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

Power consumption

CN7220 6 VA / 6 W
CN7234 8 VA / 6 W

Ambient limits

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

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

Lifetime

Full strokes 60000
Repositions

Mounting

Round damper shaft
Square damper shaft 10...18 mm (3/8...11/16”)

Shaft length
Control signal 0(2)...10 Vdc

Input impedance

Feedback signal
Limits ± 1 mA at 0...10 V

Torque rating
CN7220 20 Nm (177 lb-in)
CN7234 34 Nm (300 lb-in)

Runtime
Rotation stroke
Dimensions see “Dimensions” on page 6
Weight 1.35 kg (3 lbs.)
Noise rating 40 dB(A) max. at 1 m

PRODUCT DATA

24 Vdc -10...+20%

-40...+80 ℃ (-40...+175 °F)

1.5 million

10…27 mm (3/8...1-1/16”)

45° steps

min. 22 mm (7/8”)

0(4)...20 mA

100 kΩ [0...10 V]

500 Ωm [0...20 mA]

95 sec (60 Hz) / 110 sec (50 Hz)

95°± 3°

CN0B-0341CH33 R0407 1

N20, N34 SERIES CN7220, CN7234

MODELS

C – Direct Coupled Actuator

N – Fail Safe Function (Non-Spring Return)

61 – 24V Floating Control
72 – 24V Modulating Control
46 – 230V Floating Control

C N 72 20 A 2 0 XX

Model # Description

CN7220A2007
CN7234A2008

20Nm,24Vac/Vdc, Modulating control, Non-Spring return, Voltage Feedback Signal
and without aux. Switch
34Nm,24Vac/Vdc, Modulating control, Non-Spring return, Voltage Feedback Signal
and without aux. Switch

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

A – Standard Model

1 – No Feedback
2 – Voltage Feedback Signal

0 – No Internal Auxiliary Switches
2 – Two Internal Auxiliary Switches

XX – System Controlled Numbers

Fig. 1. Product Identification System

OPERATION/FUNCTIONS

Legend for Fig. 2:

1

60

90

90

60

30
0

30

0

2

3

4

5

6

8

7

Fig. 2. Setting units and control elements

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 5.

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.

Modulating Control

The actuator is capable of being operated by several controllers providing Vdc
or mA output.

Rotary Movement

The control signal and the corresponding 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 of 95°.

ORDERING INFORMATION

When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the TRADELINE®
Catalog or price sheets for complete ordering number.

If you have additional questions, need further information, or would like to comment on our products or services, please write or phone
your local Honeywell Automation and Control Products Sales Office or Honeywell Customer Care.

CN0B-0341CH33 R0407 2