Burkert Type 8630 - Manual (Page 19)

8630 - 17
S
YSTEM
D
ESCRIPTION
• Versions
for single and double acting valve actuators
• Position sensor
very high resolution conductive plastic potentiometer, coupled without play to the piston rod of the
pneumatic actuator
• Microprocessor controlled electronics
for signal processing, control and driving the valve
• Operating module
The device is operated via 3 keys. 8-digit, 16-segment LC display for showing the setpoint or actual
value and for configuration and parametrization via menu functions.
• Positioning system
With single-acting actuators, the positioning system consists of 2 solenoid valves; with double-acting
actuators of four solenoid valves. With single-acting actuators, one valve serves to pressurize the
pneumatic piston drive and another to exhaust it. Double-acting actuators contain 2 valves for
pressurization and 2 for exhausting.The solenoid valves work on the rocker principle and are driven
via the controller with a PWM voltage. This enables great flexibility with regard to actuator volumes
and floating speed. For larger pneumatic actuators, the solenoid valve are equipped with diaphragm
boosters.
As an option, with single-acting actuators, there are fast pressurizing/exhaust variants with an additio-
nal pressurizing valve and an additional exhaust valve. These enable the actuator to be completely
pressurized and exhausted more rapidly. This is used with the tight-closure function (see section
"
CUTOFF") and on activation of a safety position of 0 or 100% (see section "BIN-IN").
• Position repeater (optional)
2 inductive proximity switches (initiators) or mechanical limit switches.
Attainment of an upper or lower position of the valve can be relayed via binary outputs e.g. to a PLC.
The end settings on the initiators can be adjusted by the owner by means of setscrews.
Design features
• Electrical interfaces
Multipole plug connector or cable bushing
• Housing
The housing of the TOP Control is protected by a pressure relief valve from excessive internal
pressure, e.g. resulting from leaks.
The cover may be secured against unauthorized opening with a lead seal or with a self-tapping
screw.
• Pneumatic interfaces
1/4’’- connectors in various threads
(G, NPT, RC)