Data sheet
EL ACTUATOR WITH POTENTIOMETER (Kit option)
Sheet No.: A5.202 Rev.A
Date: November 2009
Description
This electric actuator variation has the addition of a potentiometer to provide continuous
indication of the actuator (and therefore valve) position. When wired as shown a voltage signal
will indicate an analog position.
Indication shaft
Limitswitch and rotor
Top motor plate
3
4
Construction
The potentiometer is fitted into a pre-drilled hole in the top motor plate and driven, by a pair of
spur gears, so that the 90° rotation of the indicator shaft turns the potentiometer spindle through
it’s full operational travel.
19
5
20
21
6
Brown
PC
no
3
4
5
6
7
Black
Brown
Terminal strip
7
N
The potentiometer is wired to the terminal strip and may be wired externally via one of the spare
electrical entries. This is particularly important if the indication voltage is different from the power
voltage.
No
req
1
1
1
1
1
Description
Drive pinion (large)
Potentiometer pinion (small)
Potentiometer spacer
Potentiometer
Markingtag
Indicator supply
Incoming power
L
16A
Field wiring
Close
Open
Trimmer
Indicator
no
nc
Limit switch Limit switch Heater
close 1
open 2
10W
24
25
26
27
Blue
no
23
Potentiometer
nc
Limit
switch 3
Specification
Potentiometer
Make
Voltage
Power
Temperature
Resistance
Type
Linearity
Mech. rotation
Electrical rotation
Max. terminal resitance
Identification
Factory Option
Kit Option
: Add “+ POT” to the basic actuator size
: eg. EL 55 220/50 + POT
: Actuator size is added to: “Kit, POT”
: eg. Kit, POT/EL 55 120/50
: SFERNICE
: Up to 350V
: 1 Watt
: -4°F to +158°F
: 10KΩ (±20%)
: Cermet
: 2%
: 270°
: 270°
: 2Ω
Note 1) When supplied as a kit option, all the components as shown are included,
together with an instruction sheet
2) A special version is required for more than 90°
3) Wiring diagram for EL55 120V/60Hz + POT
com
com
com
nc
22
Green
21
White
20
Yellow
19
Red
12
Black
Motor 1~
11
Brown
no
10
Black
com
Actuator
wiring
9
Brown
8
Brown
7
Brown
Black
C
6
Blue
5
Green
4
White
3
Yellow
2
Red
1
POT
no
nc
Limit
switch 4
TM
www.El-O-matic.com
Copyright © Emerson Process Management. The information in this document is subject to change without notice.
Updated data sheets can be obtained from our website www.El-O-Matic.com or from your nearest Valve Automation Center USA: +1 813 319 0266 Europe: +31 74 256 10 10 Asia-Pacific: +65 6501 4600