W.e. anderson div., dwyer instruments, inc – Dwyer EVA3 User Manual

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W.E. ANDERSON DIV., DWYER INSTRUMENTS, INC.

P.O. BOX 358 • MICHIGAN CITY, INDIANA 46361 U.S.A.

Phone: 219/879-8000

www.dwyer-inst.com

Fax: 219/872-9057

e-mail: [email protected]

WORKING
STATE

WORKING
DIRECTION
SELECTION
WHEN WITHOUT
CONTROL SIGNAL

EVA2M (EVA3M) PCB SETTING DIAGRAM

COM

DOWN

PCB

POWER

SUPPLY

24 VAC

SUPPLY/

SIGNAL

COM

3 (+)

CONTROL SIGNAL

0-10 VDC OR

4-20 mA DC

Note: Actuator must be protected from dripping water. Damage to
internal elements and motor may occur. Do not cover actuator with
material that does not permit heat exchange.

EVA2F (EVA3F) WIRING DIAGRAM

EVA2M (EVA3M) WIRING DIAGRAM

OPERATION
1. The actuator is driven by a reversible synchronous motor with a
magnetic clutch. The motor can provide stable torsion at stopping
conditions due to the magnetic force created by the motor rotor and the
magnetic clutch. When power is taken away, the motor will stop at its
current position.

2. The signal of the proportional type actuator controls the clockwise or
counter-clockwise rotation of the motor.

3. EVA2M (EVA3M) actuators can be jumper selected for 0.51, 0.59,
0.67 or 0.75 inch valve strokes. Factory stroke setting is 0.75”.

4. The input control signal is jumper selectable between 0-10V or 4-20
mA DC. Factory setting is 0-10V DC input mode.

5. Direct (DA) or Reverse (RA) direction operation is also jumper
selectable. The two states are opposite of each other.

MAINTENANCE
The Series EVA2 and EVA3 Electric Actuators are not field serviceable
and should be returned if repair is needed (field repair should not be
attempted and may void warranty). Make sure to cut off power supply
when disconnecting the actuator from the valve. Contact customer
service to receive a return goods authorization number before shipping.
Be sure to include a brief description of the problem plus any relevant
application notes.

Printed in U.S.A. 12/09

FR# R2-443387-00 Rev.1

Terminals
1-2
1-3

Actuator Rod
Down Extend
Up Contract

Input Control Signal
DA
Increase
Decrease

Actuator Rod
Down
Up

RA
Decrease
Increase

Bulletin V8:Bulletin V8 12/10/09 3:24 PM Page 2

This manual is related to the following products:

EVA2