Manualshelf

Data Sheet for Product

ManualsBrandsSiemens ManualsShort Stroke (BC3)Powermie 599 MT Series SAS Electronic Valve Actuator, 24 Vac or 24 Vdc, Floating Control (3-Position) Technical Instructions
12345
SAS Electronic Valve Actuator, 24V, Floating (3-Position) Control Technical Instructions
Document Number 155-681
October 2, 2017
Siemens Industry, Inc. Page 3
Operation
• A 24V control signal to Y1 extends the actuator stem proportionately to the length
of time the signal is applied.
• A 24V control signal to Y2 retracts the actuator stem proportionately to the length
of time the signal is applied.
• In the event of a power failure:
• SAS81.03U is non-spring return and holds its last position.
• SAS81.33U returns the valve to its normal spring return position.
Mounting and
Installation
Mount the actuator in any position except with the actuator lower than the valve.
Figure 1 shows acceptable actuator mounting positions for water applications. The
recommended mounting position of the actuator for low pressure steam applications is
between 45° and horizontal.
Figure 1. Acceptable Mounting Positions.
Wiring
• Use earth ground isolating, step-down Class 2 power supplies. Do not use auto
transformers.
• Determine supply transformer minimum rating by summing total equipment on
circuit. The maximum rating for Class 2 step-down transformers is 100 VA.
• Do not power more than 10 actuators with one transformer. (Use 0.5 amp fuse on
secondary per actuator.)
WARNING:
Housing rated for flex conduit only.