Honeywell 272630D Manuel utilisateur

INSTALLATION INSTRUCTIONS

Place Bar Code Here

95C-10941-02

272630D Position Feedback and

Auxiliary Switch Accessory

FOR ML6984 AND ML7984

APPLICATION

The 272630D auxiliary board is an optional circuit board

that is used in conjunction with Series 4000 ML6984 and

ML7984 globe valve actuators. This auxiliary board

combines the function of an adjustable low voltage SPDT

auxiliary switch with a 2-10 Vdc or 4-20 mA position

feedback signal. It has a 4-pin keyed connector for

communications from the mother circuit board.

SPECIFICATIONS

Feedback: 2-10 Vdc (10-2 V reverse acting) into mini-

mum impedance 500 ohm. Maximum output current is

20 mA dc.

Auxiliary Switch: SPDT, 24 V, 50/60Hz, 1 A inductive.

Fixed differential (3% of stroke), adjustable operating

point from 0 to 100% of stroke.

INSTALLATION

When installing this product...

1. Read these instructions carefully. Failure to follow

them could damage the product or cause a hazard-

ous condition.

2. Check ratings given in instructions and on the

product to ensure the product is suitable for your

application.

3. Installer must be a trained, experienced service

technician.

4. After installation is complete, check out product

operation as provided in these instructions.

CAUTION

1. Disconnect power supply before beginning

installation to prevent electric shock and

equipment damage.

2. All wiring must comply with applicable local

electrical codes, ordinances and regulations.

3. DO NOT electrically operate the ML6-7984

actuator before assembly to the valve

because damage not apparent to the

installer may occur. Mount the actuator to the

valve before connecting to power.

Assembly

1. Remove plastic cover from the ML6-7984 by loos-

ening the two screws located on the top. (Note:

These screws are captive. Rotate three complete

revolutions to remove cover).

2. Slide the auxiliary board into the two slots at the

bottom of the bridge. Push back and snap the

board into the fingers. (See Fig. 1)

3. Connect one end of the 4-pin connector to the

main board and the other end to the auxiliary board

if it is not already connected. The connectors are

keyed and only install one way.

4. Mount the actuator onto the valve body and con-

nect wiring.

5. Reinstall cover after operational check.

272630D POSITION FEEDBACK AND AUXILIARY SWITCH ACCESSORY

Automation and Control Solutions

Honeywell International Inc.

1985 Douglas Drive North

Golden Valley, MN 55422

Honeywell Limited-Honeywell Limitée

35 Dynamic Drive

Toronto, Ontario M1V 4Z9

customer.honeywell.com

® U.S. Registered Trademark

95C-10941—02 T.D. Rev. 08-10

Printed in U.S.A.

Fig. 1. Installation of auxiliary board.

OPERATION

The first time the valve is powered, the microprocessor

will automatically cycle the valve through a full stroke to

calibrate its position. Any stroke between 1/2" (13 mm)

and 1" (25 mm) will be divided into 30 equal steps. Run

time will be proportional to stroke length. (For example:

nominal timing for 3/4" stroke is 63 seconds. For 1/2"

stroke this would be 42 seconds). The LED lights up

when terminals T5-T6 are powered, and flash when the

actuator is in motion.

NOTE: 272630D requires that the actuator be continu-

ously powered, so ML6984 must be wired in "5-

wire" configuration.

Fig. 2. Wiring and operation of auxiliary board

272630D.

The 272630D provides:

1. A 2-10 Vdc voltage proportional to the valve stem

position. This output is capable of sourcing up to

20 mA dc drive current.

2. An isolated "Form C" relay contact closure that

energizes when the valve is open more than the

setting of the trimmer potentiometer ("trim pot").

Position feedback voltage mirrors the control signal. For

ML6984 and direct acting ML7984 operation, see Fig. 3.

For reverse acting ML7984, see Fig. 4.

Fig. 3. Feedback voltage response for ML6984 and

direct acting ML7984.

Fig. 4. Feedback voltage response for reverse acting

ML7984.

Auxiliary Switch Setup

1. Drive actuator to desired position.

2. Adjust trimmer potentiometer ("trim pot") until relay

is energized. (On-board LED will light).

BRIDGE

SLOTS

1. INSTALL

CIRCUIT

BOARD

FINGERS

M32264

TRIM POT

LED

+FB

RLY1

-COM

C-NC CONTACT

CLOSED

WHEN VALVE

POSITION IS

BELOW TRIM POT

SETTING (DIRECT

CTING).

C-NO CONTACT

CLOSED

WHEN VALVE

POSITION IS

ABOVE TRIM

POT SETTING

(DIRECT ACTING).

2-10 V,

(4-20 MA

INTO

500 Ω)

FEEDBACK

OUTPUT COM

CONNECT TO MAIN

BOARD FOR POSITION

FEEDBACK.

CNO

M32265

1.75V 2.5V 9.5V 10.25V

FEEDBACK VOLTAGE

LOWER

SEAT

UPPER

SEAT

STROKE

28 STEPS @

0.25V PER STEP

FIRST AND LAST STEPS

ARE @ 0.75V PER STEP

M32266

10.25V

9.5V

2.5V

1.75V

FEEDBACK VOLTAGE

LOWER

SEAT

UPPER

SEAT

STROKE

28 STEPS @

0.25V PER STEP

FIRST AND LAST STEPS

ARE @ 0.75V PER STEP

M32267

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