Samson Series 420, Руководство пользователя

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EB 7500 EN 19
Design and principle of operation
Type 3423-2 PI Controller Module
The following controller module versions are
almost identical to the Type 3423-2 PI Con-
troller Module, except they are fitted with, for
example, an operating point adjuster, a de-
rivative element or a selector switch, de-
pending on the application.
Type 3423-1 P Controller Module
This module is largely identical to the
Type 3423-2 PI Controller Module.
Type 3423-3 PID Controller Module
This module is largely identical to the
Type 3423-2 PI Controller Module.
This module, however, contains an addition-
al derivative element providing a deriva-
tive-action gain of approx. ten times in the
input branch of the controlled variable x.
The derivative-action time can be adjusted at
the TV restrictor.
Fig. 10: Type 3423 Controller Modules
R Feedback
R1/R2 Feedback
bellows
1.4 bar supply
air
y
A
Output pressure
S
Switching
pressure
Turnboards
A
Direction of
action
B Air delivery