Data Sheet for Product

Technical Instructions SAS Electronic Valve Actuator, 24V, Floating (3-Position) Control
Document Number 155-681
October 2, 2017
Page 2 Siemens Industry, Inc.
Specifications
Operating voltage/frequency 24 Vac/Vdc, ±20%
Frequency 45 to 65 Hz
Power Supply Earth ground, isolating Class 2,
24V transformer
NOTE: Do not power more than 10
actuators with one transformer.
(Use 0.5 amp fuse on secondary
per actuator.)
Power consumption - running
SAS81.03U 2.5 VA
SAS81.33U 3.4 VA
Power Requirements
Control Characteristics
Control signal Floating (3-position)
Y1 Positioning signal extends actuator stem.
Y2 Positioning signal retracts actuator stem.
Functional Operation
Running time
at 60 Hz 30-seconds
Spring return time (SAS81.33U only) <14-seconds
Nominal stroke 7/32-inch (5.5 mm)
Nominal force 90 lbs (400 N)
Fail-safe (SAS81.33U only) Mechanical spring
Agency Approvals
UL UL listed to UL873
cUL certified to CSA C22.2 No. 24-93
Environmental
Conditions
Ambient temperature
Operation 23°F to 131°F (–5°C to 55°C)
Transport and storage –13°F to 158°F (–25°C to 70°C)
Humidity <95% rh
Max. permissible media temperature in valve 34°F to 248°F (1°C to 120°C)
Physical Characteristics
Conduit opening Knockouts for standard 1/2-inch (12.7 mm)
conduit connector
Weight
SAS81.03U 0.9 lbs. (0.4 kg)
SAS81.33U 1.5 lbs. (0.68 kg)
Dimensions See Figure 6 and Figure 7.
Service Kit
If the actuator is inoperative, replace the unit.
Accessory
Auxiliary Switch ASC10.51 switches on or off when a certain
position is reached. The switching point can lie between 0 to
100%.