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GENERAL SPECIFICATIONS – Group 31 Compact Rotary Actuators

Output Torque and Timing

MODEL # TORQUE
(LB-FT)
STROKE TIME
(SEC./90°)
(60 HZ)
STROKE TIME
(SEC./90°)
(50 HZ)
31-M50, 31-350, 31-250
30
24
29
31-M30, 31-330, 31-230
15
18
22

Specifications Common to All Models:

Drive Power 120 Vac, single-phase, 50 or 60 Hz, 0.5A, 60 Watts
Operating Conditions –40° to 65° C, (–40° to 150° F)
0 to 99% relative humidity
Action on Loss of Power Stays in place
Handwheel Provides manual operation without electrical power. Non-rotating during automatic operation, does not require declutching mechanism
Motor 120 V ac, single-phase, no burnout, noncoasting. Capable of 60 starts per minute
Gear Train Precision cut, heat-treated alloy steel and ductile iron. Self-locking and self-releasing, able to hold position at 150% rated torque
Mechanical Stops Prevent overtravel during automatic or manual operation. Mechanical stops are external to the drive
Drive Net Weight 25 lbs
Max. Overhung Load 500 lbs

Switches

Cam controlled, field adjustable. Two limit switches (S3 & S4) open the motor circuit at end-of travel limits. Two auxiliary switches (S1 & S2) provied external signaling as specified through connections made at the terminal board. All four switches are SPDT and are rated for 1 amp at 120 V ac.

Enclosure

Precision machined aluminum alloy castings, painted with corrosion resistant polyurethane paint. All units meet NEMA 4 specifications and are also available FM approved for use in CLass 1, Div. 1, Group D; Class II, Div. 1, Groups E, F, & G; and Class III, Div.’s 1 & 2 hazardous locations.

 

SPECIFICATIONS FOR CONTROL OPTION 3 DRIVES (MODELS 31-M50 AND 31-M30): SPECIFICATIONS FOR CONTROL OPTION 2 DRIVES (MODELS 31-350 AND 31-330):
Demand Input Signal Range 4–20 mA OR 1–5 V dc
Signal Span Adjust 50% to 125% of 4 V span
Signal Zero Adjust Up to 120% of span
Split Signal Range: 4-12 mA or 12-20 mA
Deadband 1% of span
Sensitivity 0.2% of span
Feedback Signal * 4–20 mA OR 1–5 V dc 4–20 mA OR 1–5 V dc
Output Stability for
Temperature Change
+/- 0.03%/°C of span for -40°C to 50°C +/- 0.03%/°C of Span for -40°C to 50°C
Stall Relay Contacts Form A, 10 volt-amps at 120 V ac or dc
Action on Loss of Input Signal (Power On) Stays in place or runs to any preset position (configurable).
Action on Stall Relay contacts open after 68 seconds of stall, remote signal available. Power to motor is turned off.
Handswitch Permits local operation, independent of controller signal. The handswitch is located beneath the control module cover on the control board.