EB 7500 EN
21
Design and principle of operation
The ratio V = a/e is adjusted in the same
way as the proportional-action coefficient Kp
(gain) for P controllers.
5.7 Additional modules
The Type 3424 Additional Module is no lon-
ger available.
The additional modules upgrade the control
equipment especially concerning processing
engineering requirements. They are mounted
between the controller module and the con-
troller module assigned to the connector
strip.
5.7.1
Type 3424-2x for i/p
conversion
See
u
T 7523. The i/p additional module is
used to link electric systems to the manual
control station. It is used to convert a stan-
dardized 4 to 20 mA DC signal into a stan-
dardized pneumatic signal from 0.2 to
1 bar.
The i/p converter, which functions according
to the force-balance principle, is mounted di-
rectly to the controller module of the
Type 3421 Compact Controller (Type 3424-
21) or to the Type 3422 Manual Control Sta-
tion (Type 3424-20).
In the delivered state, the output pressure is
either connected to the signal channel of the
controlled variable x or to the external refer-
ence variable w
ext
depending on the order
specifications.
The Type 3424-2 i/p Converter is no longer
available. Instead, the external mounting of
a Type 6111, 6116 or 6126 i/p Converter
is possible. Further details are available on
request.
Fig. 12:
Type 3424-2x and Type 3424-4
Additional Modules
Note
Type 3424-4
Manual/
automatic Transfer
Type 3424-21
with terminal plate for
pneumatic self-seal push-on
fittings
Type 3424-23
mounted onto Type 3423-2 Controller
Module
