Phone: 219/879-8000
www.dwyer-inst.com
Fax: 219/872-9057
e-mail: [email protected]
W.E. ANDERSON DIV., DWYER INSTRuMENTS, INC.
P.O. BOX 358 • MICHIGAN CITY, INDIANA 46360 u.S.A.
WORKING
STATE
WORKING
DIRECTION
SELECTION
WHEN WITHOUT
CONTROL SIGNAL
EVA2M (EVA3M) PCB SETTING DIAGRAM
1
COM
2
DOWN
3
UP
M
PCB
1
POWER
SUPPLY
24 VAC
2
SUPPLY/
SIGNAL
COM
3 (+)
CONTROL SIGNAL
0-10 VDC OR
4-20 mA DC
M
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.
©Copyright 2014 Dwyer Instruments, Inc.
Printed in U.S.A. 9/14
FR# R3-443387-00 Rev. 2
Terminals
1-2
1-3
Actuator Rod
Down Extend
Up Contract
Input Control Signal
DA
Increase
Decrease
Actuator Rod
Down
Up
RA
Decrease
Increase
