Powermite 599 Series MT Series SAS Electronic Valve Actuator 24V Proportional Control
Technical Instruction
Document No. 155-682
January 19, 2016
Siemens Industry, Inc.
Page 3
Accessory
Auxiliary Switch ASC10.51 switches on or off when a certain
position is reached. The switching point can lie between 0 to 100%.
Service Kit
If the actuator is inoperative, replace the unit.
Operation
A zero voltage control signal returns the valve to its normal position.
In the event of a power failure:
•
SAS61.03U is non-spring return and holds its last position.
•
SAS61.33U returns the valve to its normal spring return position.
The position output 0 to 10 Vdc signal “U” produces position feedback to the controller.
Mounting and
Installation
Figure 1. Acceptable Mounting Positions.
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.
Wiring
•
All units using the same control signal must utilize the same neutral reference (G0).
•
Use earth ground isolating, step-down Class 2 transformers. Do
not
use auto
transformers.
•
Determine supply transformer minimum rating by summing the 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.
WARNING:
Housing rated for flex conduit only.