Product Overview

Models
Model
Number*
Torque,
in-lbs.
(N•m)
Control Type
Operating
Voltage
Auxiliary
Switches***
Voltage
Feedback
Electrical
Connections****
FCC and
ICES-003
Powered
and Fail-Safe
Running Time
(seconds/90°)
MEP-4254 (V)*
25
(2.82)
Two-Position
(2-wire)
†
24 VAC/
VDC**
0
None
Terminals
Class A <35 and <30
MEP-4274 1 Adjustable 2 Cables
MEP-4255 (V)*
100–240
VAC
0 1 Cable
Class B
<25 and <30
MEP-4275 1 Adjustable 2 Cables
MEP-4251 (V)*
Tri-state/
2-Position
(4-wire)
†
24 VAC/
VDC
0 Terminals
<35 and <30
MEP-4252 (V)*
Proportional
2–10 VDC
1–5 or
2–10 VDC
<50 and <30
‡
MEP-4272 1 Adjustable 2 Cables
MEP-4554 (V)*
45
(5)
Two-Position
(2-wire)
†
24 VAC/
VDC**
0
None
Terminals
Class A <35 and <30
MEP-4574 1 Adjustable 2 Cables
MEP-4555 (V)*
100–240
VAC
0 1 Cable
Class B
<25 and <30
MEP-4575 1 Adjustable 2 Cables
MEP-4551 (V)*
Tri-state/
2-Position
(4-wire)
†
24 VAC/
VDC
0 Terminals
<35 and <30
MEP-4552 (V)*
Proportional
2–10 VDC
1–5 or
2–10 VDC
<50 and <30
‡
MEP-4572 1 Adjustable 2 Cables
MEP-4954
90
(10)
Two-Position
(2-wire)
24 VAC/
VDC**
0
None
Terminals
Class A <45 and <40
MEP-4974
1 Adj., 1
Fixed
2 Cables
MEP-4955
100–240
VAC
0 1 Cable
Class B
<30 and <40
MEP-4975
1 Adj., 1
Fixed
2 Cables
MEP-4951
Tri-state/
2-Position
(4-wire)
†
24 VAC/
VDC
0 Terminals
<45 and <40
MEP-4952
Proportional
2–10 VDC
†
1–5 or
2–10 VDC
<80 and <40
‡
MEP-4972
1 Adj., 1
Fixed
2 Cables
*MEP-4xxxV models (e.g., MEP-4254V or MEP-4552V) have the quick-mount option. MEP-42xxV are for use on 1/2" and 3/4"
ball valves; MEP-45xxV are for use on 1" to 3" ball valves. Only some models have the “V” option.
**Two-position 24 VAC/VDC MEP-4xx4 models are FCC Class A, Part 15, Subpart B and complies with Canadian ICES-003
Class A. All other models are Class B. For other approvals, which apply to all models, see Specifications on page 3.
***One auxiliary switch is adjustable 0–90°. On MEP-497x models, the second switch is fixed at 10° from full CW direction (Blue is
connected to Orange in the 0–10° range, and Blue is connected to Green 11–90°).
****Connections are made on either fixed terminals that accept 12–26 AWG wiring or (for line-voltage models and/or models with
an auxiliary switch) prewired 3-foot, 18 AWG cable(s).
†
For two-position and tri-state, the “control signal” is the same as the operating voltage.
‡
After initial power-up, proportional models delay enabling motor operation approximately 30 seconds until the capacitors are
charged. No actuator rotation will take place for at least the first 30 seconds.
NOTE: The above chart lists the dierences among models. Supply power, supply frequency,
transformer sizing, fail-safe, angular rotation, noise level, mounting, dimensions, weight,
enclosure material, position indication, servicing, quality standard, warranty, and
environmental limits are the same for all models. See Specications on page 3.