2 Application and function
Digital Positioning System 2000 3
2 Application and function
2.1 Proper and intended use
The positioning devices StG 2040-PD and StG 2080-PD are to be used solely for control
applications on engines. They are intended for use in an industrial environment. When
operated outdoors, additional protective measures against weather are also required.
Signals are exchanged through electrical signals. Because transmission may be interfered
with by external circumstances or influences, the user must provide additional safety
devices to match the application case.
In individual cases, the following must be coordinated with the manufacturer
HEINZMANN:
Each use which deviates from the above mentioned
Modifications to the device
Use in extreme, ambient conditions that deviate from the specification
(dust, temperature, wetness)
Use under powerful electrical or electromagnetic fields
Use in aggressive atmospheres or vapours
Use in potentially explosive areas
A written opinion from the manufacturer must always be procured in the event of any
obscurities, queries or missing statement.
2.2 Function description
Positioners show a directly proportional correlation between the position of the actuator
output shaft and a command input signal. StG 2040-PD and StG 2080-PD are electrical
positioners with rotating output shaft. They are actuated by an external, electrical position
set point signal, and thereby automatically regulate the mechanical position of their output
shafts. The position set point is transmitted as a current, voltage or PWM signal to each
positioning device. For operation the devices must be connected to an external mains
supply.
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