Description of the controller
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RES-420
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Description of the controller
The microprocessor technology endows the
RESISTRON temperature controller RES-420 with pre-
viously unattainable capabilities:
• Very simple operation thanks to AUTOCAL, the
automatic zero calibration function.
• Good dynamic response of the control system
thanks to AUTOTUNE, which adapts automatically
to the controlled system.
• High precision thanks to further improved control
accuracy and linearization of the heatsealing band
characteristic.
• High flexibility: The AUTORANGE function (as of
software revision 100) covers a secondary voltage
range from 0.4V to 120V and a current range from
30A to 500A.
• Automatic adjustment to the line frequency in the
range from 47Hz to 63Hz.
• Increased protection against dangerous conditions,
such as overheating of the heatsealing band.
The process data is represented on an LC display with
4 lines and 20 characters. Devices with a VF display
are available as an option. Various display languages
can be selected.
The real heatsealing band temperature is visualized on
the display both as a digital number in °C and in the
form of a dynamic bar.
The RESISTRON temperature controller RES-420 also
features an integrated fault diagnosis function, which
tests both the external system (heatsealing band,
wiring etc.) and the internal electronics and outputs a
selective error message in case of a fault.
To increase operational safety and interference immu-
nity, all 24VDC logic signals are electrically isolated
from the controller and the heating circuit.
The menu in the temperature controller itself can be
used to adapt to different heatsealing band alloys
(Alloy-20, NOREX etc.) and set the required tempera-
ture range (0…300°C, 0…500°C etc.).
The RESISTRON temperature controller RES-420 is
designed for installation in a front panel cutout. The
compact design and the plug-in connections make this
controller easy to install.
