Samson Series 420, Руководство пользователя

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20 EB 7500 EN
Design and principle of operation
The Type 3423-4 PD Controller Module is
similar to Type 3423-4.
This module, however, contains a derivative
element providing a rate gain of the input
branch of the controlled variable x. It has a
derivative-action gain of approx. ten times
and a derivative-action time that can be ad-
justed at the TV restrictor.
The Type 3423-5 P/PI Controller Module
with P/PI selector switch can be used either
as P controller with operating point setting or
PI controller.
This module is designed in the same way as
the PI and P controller modules.
The Type 3423-6 PD/PID Controller Module
with PD/PID selector switch can be used ei-
ther as PD or PID controller.
The
Type 3423-9 P Controller Module with
set-point-dependent operating point is the
same as Type 3423-1 P Controller Module,
except the operating point changes propor-
tionally to the set point w.
Type 3423-7 Ratio Relay
This device is designed as the Type 3423-1 P
Controller Module. The constant pressure of
the operating point adjuster, however, is fed
to the R1 and w bellows. The output pressure
a is proportional to the input pressure e (a =
e x Kp). In ratio control applications, this
pressure is the reference variable for a slave
controller.
Fig. 11: Type 3423 Controller Module