Honeywell CN34, CN7220A2007, CN20, CN7234A2008 Product Data

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Page 1

CN20, CN34 SERIES

NON-SPRING RETURN DIRECT-COUPLED DAMPER ACTUATORS FOR MODULATING AND FLOATING / 2-POSITION CONTROL

PRODUCT DATA

SPECIFICATIONS

Supply voltage 24 Vac/dc ±15%, 50/60 Hz;

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

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

Power consumption

CN7220A2007 6 VA / 3 W CN7234A2008 6 VA / 3 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 II

GENERAL

These direct-coupled damper actuators provide modulating control for:

• air dampers,

• VAV units,

• air handling units,

• ventilation flaps,

• louvers, and

• reliable control for air damper applications with up to

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).

FEATURES

• Self-centering shaft adapter

• Access cover to facilitate connectivity

• Service/off for safe & easy servicing

• Rotation direction selectable by switch

• Declutch for manual adjustment

• Mechanical end limits

• Field-installable auxiliary switches

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

• Mechanical position indicator

• CE and UL certified

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")

Control signal 0(2)...10 Vdc

0(4)...20 mA Input impedance >100 kΩ [0...10 V]

500 Ω [0...20 mA]

Feedback signal

Limits ± 1 mA at 0...10 V

End switches (when included)

Rating 5 A (resistive) / 3 A (inductive) Triggering points 5° / 85°

Torque rating

CN7220A2007 20 Nm (177 lb-in) CN7234A2008 34 Nm (300 lb-in)

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

or DC supply)

Rotation stroke 95° ± 3° Dimensions see "Dimensions" on page 8 Weight (without cables) 1.35 kg (3 lbs.) Noise rating 40 dB(A) max. at 1 m Certification CE & UL

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CN20, CN34 SERIES DAMPER ACTUATOR FOR MODULATING AND FLOATING CONTROL

MODELS

Model # Description

CN7220A2007

CN7234A2008

20Nm,24Vac/Vdc, Modulating and floating/2-position control, Non-Spring return, Voltage Feedback Signal and without aux. Switch 34Nm,24Vac/Vdc, Modulating and floating/2-position control, Non-Spring return, Voltage Feedback Signal and without aux. Switch

PRODUCT IDENTIFICATION SYSTEM

C – Direct Coupled Actuator

N – Fail Safe Function (Non-Spring Return)

61 – 24V Floating/2-position Control 72 – 24V Modulating and Floating/2-position Control 46 – 230V Floating/2-position Control

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

C N 72 20 A 2 0 XX

Fig.1. Product Identification System

OPERATION / FUNCTIONS

7 8

Fig. 2. Setting units and control elements

Legend for Fig.2:

1 Self-centering shaft adapter 2 Retainer clip 3 Rotational angle scales (0...90° / 90...0°) 4 Mechanical end limits 5 Declutch button 6 Anti-rotation bracket 7 Function Selection 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 installation instruction.

RUN MODES

The function selection switch (see Fig 3) is used to place the actuator into any one of five different modes:

• 2-10V, modulating control; floating/2-position control, cw run

• 0-10V/Dir, modulating control; floating/2-position control, cw run

• Service/Off, actuator stop running

• 10-0V/Rev, modulating control; floating/2-position control,

ccw run

EN0B-0341CH33 R0803A 2

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CN20, CN34 SERIES DAMPER ACTUATOR FOR MODULATING AND FLOATING CONTROL

• 10-2V, modulating control; floating/2-position control, ccw run

Fig.3. Function selection switch

Power-Off Behavior

If power is removed, the actuator retains its position.

Service/Off

If the function selection switch is set to the "Service/Off" position, all rotary movement is cancelled, and all control signals are ignored, thus allowing the actuator to be safely manually operated.

Floating/2-Position Run Mode

If the function selection switch has been set to one of the four positions (2-10V, 0-10V/Dir, 10-0V/Rev, 10-2V) – and the actuator is wired as Floating/2-position mode (see A2 and A3) – then as soon as operating power is applied, the actuator will run clockwise or counterclockwise.

Table 1. Shaft adapter behavior in the floating mode

Control signal at Function selection switch settings

Terminal 3 Terminal 4 2...10V 0...10V /Dir Service / Off 10...0V /Rev 10...2 V

open open stops stops stops stops stops open 24 Vac/dc CCW CCW stops CW CW

24 Vac/dc open CW CW stops CCW CCW

Table 2. Shaft adapter behavior in the 2-position mode

Control signal at Function selection switch settings

Terminal 3 Terminal 4 2...10V 0...10V /Dir Service / Off 10...0V /Rev 10...2 V

24 Vac/dc open CW CW stops CCW CCW 24 Vac/dc 24 Vac/dc CCW CCW stops CW CW

Table 3. Shaft adapter behavior in the modulating mode

Control signal at Function selection switch settings

Terminal 3 Terminal 4 2...10V 0...10V /Dir Service / Off 0...10V /Rev 10...2 V

Open

< min. control signal plus 0.24V

between min. control signal plus 0.24V

and max. control signal minus 0.24V

> max. control signal minus 0.24V

open -- -- stop -- --

24 Vac/dc

open -- -- stop -- --

24 Vac/dc

open proportional proportional stop proportional proportional

24 Vac/dc

open -- -- stop -- --

24 Vac/dc

Modulating Run Mode

If the function selection switch has been set to one of the four positions (2-10V, 0-10V/Dir, 10-0V/Rev, 10-2V) – and the actuator is wired as modulating mode (see A1) – as soon as operating power is applied, the actuator will run according to the control signals applied. If terminal 5 is also wired, the actuator will output the voltage feedback signal(0/2-10V) proportional to actuator’s actual position. Alternatively, if terminal 4 is wired and powered on, actuator will override the control signal and immediately come to a position of 0% of max. stroke.

Table 1 describes the actuator behavior (stops, rotates CCW, or rotates CW) for the floating mode in relation to the control signals applied to terminals 3 and 4 and to the function selection switch setting.

Table 2 describes the actuator behavior (stops, rotates CCW, or rotates CW) for the 2-position mode in relation to the control signals applied to terminals 3 and 4 and to the function selection switch setting.

Table 3 describes the actuator behavior (stops, rotates CCW, rotates CW, runs in proportional position, or runs to 0% of max. stroke) for the modulating mode in relation to the control signals applied to terminals 3 and 4 and to the function selection switch setting.

0% (most

left)

0% (most

left)

0% (most

left)

0% (most

left)

0% (most

left)

0% (most

left)

0% (most

left)

0% (most

left)

stop

0%(most

right)

0%(most

right)

0%(most

right)

0%(most

right)

0% (most

right)

0% (most

right)

0% (most

right)

0% (most

right)

3 EN0B-0341CH33 R0803A

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CN20, CN34 SERIES DAMPER ACTUATOR FOR MODULATING AND FLOATING CONTROL

Adaption will be carried out only when:

100

final position of shaft adapter (% of max. stroke)

upper dead band (9.76 to 10.0 V)

range of proportional

actuator movement

(0.24 to 9.76 V)

lower dead band (0 to 0.24 V)

00.24

control signal (V)

5.0 10.09.76

Fig.4. Final actuator position in dependence upon control

signal (example selection setting of 0...10 V)

• Modulating models only, such as CN7220A2007, CN7234A2008, etc,

• actuator is wired in modulating mode (see Fig. A1)

• the control signal’s value rises up into the upper dead

band (i.e to more than the max. control signal minus

0.14V) or drops down into the lower dead band (i.e to less than the min. control signal plus 0.14V), and if the shaft adapter can remain at the respective (upper or lower) mechanical end limit at least 3 seconds, the actuator will recognize the new position automatically, and autoadaption is happened (see Fig. 4).

Sleep Mode

When actuator reaches end stop or any obstacles blocking its running, it will fall into sleep mode automatically. Actuator will periodically start up and try to resume running, which will save energy significantly through whole service life.

Overriding

100

An override is a condition in which a 24 V signal is applied to terminal 4 of an actuator in the modulating mode, thus causing the actuator to ignore the control signal at terminal 3, whereupon it will instead move to a position of 0% of its maximum stroke. It would be the most left side [0/2~10V mode] or most right side [10~0/2 V mode] (see Table 3).

Feedback

If correspondingly wired (see A1), the actuator provides, via terminal 5, a feedback signal(0/2~10V) proportional to the actual position of the actuator (see Fig. 5).

current position of shaft adapter (% of max. stroke)

feedback signal (V)

Fig.5. Feedback signal in dependence upon current

position of actuator (example selection switch setting o f

0...10 V)

Dip Switches

The actuator is equipped with two dip switches (only switch 1 selectable) accessible after removing the access cover (see Fig. 7).

Adaption

Adaption is a function in which the actuator re-maps its feedback signal and control signal in accordance with repositioned mechanical end limits (see Fig.6) and thus recognizes their new positions.

100

(before)

ion

control signal (volts)

new position of UPPER

mechanical end limit

new position of LOWER

mechanical end limit

100

(after)

final position of

actuator (% of max.)

(after)

(before)

0 10.0

Fig.6. Adaption (selection switch set to "0...10 V")

EN0B-0341CH33 R0803A 4

final position of actuator (degrees)

1 2

O N

1 2

O N

1: (U) VOLTAGE CONTROL 2: RESERVED

Fig.7. Dip switches (view with PCB at bottom)

1 2

O N

1: (mA) CURRENT 2: RESERVED

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CN20, CN34 SERIES DAMPER ACTUATOR FOR MODULATING AND FLOATING CONTROL

8580

590092.551015

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).

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. 10. Internal end switches



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 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 IP54IP54 IP54

Fig. 11. Mounting for IP54

Mounting Bracket and Screws

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.

5 EN0B-0341CH33 R0803A

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.

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CN20, CN34 SERIES DAMPER ACTUATOR FOR MODULATING AND FLOATING CONTROL

Stroke Limitation with Mechanical End Limits

The mechanical end limits enable the stroke to be limited from 0...90° in increments of 5°.

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.

Fig. 12. Access cover(models with internal switches)

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.

(models with internal switches)

OPTIONAL ACCESSORIES

The following optional accessories can be ordered separately.

Auxiliary Switch Kit

Order no.: SW2

A B

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

SPARE PARTS

Spare Parts Kit

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

• Anti-rotation bracket 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.

Fig. 13. Actuator with access cover removed

EN0B-0341CH33 R0803A 6

Contains:

• 10 anti-rotation brackets

• 20 screws

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Wiring Diagrams

A1 CN7220A2007, CN7234A2008 MODULATING A2 CN7220A2007, CN7234A2008 FLOATING

CN20, CN34 SERIES DAMPER ACTUATOR FOR MODULATING AND FLOATING CONTROL

A3 CN7220A2007, CN7234A2008 2-POS A4 END SWITCHS (Models with switch only)

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

Below 2 tables summarize the information presented in the preceding wiring diagrams.

Terminal

1 24 V ~/+ (power) unused unused 2 common ┴/─ common ┴/─ common ┴/─ 3 0[2]...10 V (control) 24 V ~/+ (control signal) 24 V ~/+ (control signal)

4 24 V ~/+ (override) 24 V ~/+ (control signal) 24 V ~/+ (control signal) 5 0[2]...10 V (feedback) unused unused

NOTE: All cables connected to these terminals must be equipped with spark suppression.

Connecting cable Terminal Description

End switches

(Models with internal

switches only)

Modulating Floating 2-position

CCW (left) 5°

CW (right) 85°

Function selection switch

S1 common

S2 normally closed

S3 normally open

S4 common

S5 normally closed

S6 normally open

7 EN0B-0341CH33 R0803A

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CN20, CN34 SERIES DAMPER ACTUATOR FOR MODULATING AND FLOATING CONTROL

DIMENSIONS

Manufactured for and on behalf of the Environmental and Combustion Controls Division of Honeywell Technologies Sàrl, Ecublens, Route du Bois 37, Switzerland by its Authorized Representative:

Automation and Control Solutions

Honeywell International Inc. Honeywell (Tianjin) Limited 1985 Douglas Drive North 66, BaiHe Road, TEDA Golden Valley, MN 55422 Tianjin, 300457,P.R.C.

EN0B-0341CH33 R0803A