17
Type 8692, 8693
english
Description of System
2.2 Features
Models•
for single-acting or double-acting valve actuators.
Position measuring system•
Non-contact and therefore non-wearing position measuring system.
Microprocessor-controlled electronics•
for signal processing, control and valve control.
Control module•
Operation of the device is controlled by four keys. The 128x64 dot matrix graphics display enables you to display the set-
point or actual value and to configure and parameterize via menu functions.
Control system•
The control system consists of 2 solenoid valves for single-acting actuators or four solenoid valves for double-acting actua-
tors. In single-acting actuators, one valve serves for the aeration and another for the deaeration of the pneumatic piston
actuator. Double-acting actuators feature 2 valves for aeration and deaeration. The solenoid valves operate according to the
rocker principle and are controlled with a PWM voltage via the controller. Doing so achieves a higher flexibility with regard to
actuator volume and final control speed. On larger pneumatic actuators the solenoid valves feature diaphragm reinforcers to
increase the maximum flow and therefore improve the dynamics.
Position feedback (optional)•
One inductive proximity switch (initiator).
When the valve reaches an upper or a lower position, this can be relayed e.g. to a PLC via binary outputs. By means of set-
screws, the operator can change the initiators or limit positions.
Pneumatic interfaces•
1/4” connections with different thread forms (G, NPT)
Hose plug-in connection
Electrical interfaces •
Multi-pole plug or cable gland
Body•
The body of the positioner is protected from excessively high internal pressure, e.g. caused by leaks, by a pressure limiting
valve.
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