Group 31 Compact Valve Actuators
Control Options
What is a Control Option?
Group 31 Compact Rotary actuators have one of several model
numbers. Each of these Group 31 model numbers is equipped with an
electronics package, which are called control options. While other Beck
actuator products append the control option to the model number, the
Group 31 product line has an inherent association between model
number and control option that does not change. The control option
number for Group 31 actuators is simply a reference to determine
appropriate parts for maintenance. A basic description for each control
options is provided below. For details on the electronics components,
please visit the Group 31 Electronics section.
Please click on a control option for a description or reference the control
option summary chart below.
3 | 2 | 1
Control Option Summary Chart *
Control
Option |
Model
Numbers |
Control
Mode |
Standard
Control
Input |
Standard
Position
Feedback |
|
31-M50
31-M30 |
Modulating |
4-20 mA |
4–20 mA
(4-wire) |
|
31-350
31-330 |
Modulating |
120 V ac |
4–20 mA
(4-wire) |
|
31-250
31-230 |
2-position
(open/close) |
120 V ac |
None |
*Please contact the factory to discuss desired options not shown here.
CONTROL OPTION 3 - The standard modulating drive offering, models
31-M50 and 31-M30 are equipped with control option 3 electronics.
Control option 3 electronics have an analog control board that may be
controlled with a 4-20 mA or 1-5Vdc signal and provide an integral 4-20
mA or 1-5 Vdc position feedback signal. The position feedback signal
may be of the 2-wire variety if specified at the time of order. Option 3
units are equipped with an electric handswitch for manual electric
operation as well as stall protection with annunciation. Typical
Arrangement
CONTROL OPTION 2 - The control option 2 drive, consisting of model
numbers 31-350 and 31-330, is a modulating unit controlled with 120
VAC direct to the motor. These units provide an integral 4-20 mA or 1-5
Vdc position feedback signal that is configured for a 4-wire setup, but
may be of the 2-wire variety if specified at the time of order. When the
drive hits the limit switch at either of the two end-of-travel positions,
power is cut to the motor. Typical Arrangement
CONTROL OPTION 1 - The control option 1 drive is an open/close unit
controlled with 120 VAC direct to the motor. When the drive hits the
limit switch at either of the two end-of-travel positions, power is cut to
the motor. Typical Arrangement
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