Description of the controller
RES-445 Page 7
4 Description of the controller
The microprocessor technology endows the
RESISTRON temperature controller RES-445 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.
A time control (timer) function integrated in the con-
troller enables the complete heatsealing process to be
controlled on simple machines, such as table heatse-
aling tools. A configurable relay output can be used to
drive motors, energize magnets etc.
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.
In addition to the digital and bar indications on the dis-
play, the ACTUAL temperature of the heatsealing band
is supplied to an electrically isolated, analog 0…10VDC
output. The real heatsealing band temperature can
thus be displayed on an external temperature meter
(e.g. ATR-x).
The RESISTRON temperature controller RES-445 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-445 is
designed for installation in a front panel cutout. The
compact design and the plug-in connections make this
controller easy to install.
5 Accessories and modifications
A wide range of compatible accessories and peripheral
devices are available for the RESISTRON temperature
controller RES-445. They allow it to be optimally
adapted to your specific heatsealing application and to
your plant's design and operating philosophy.
5.1 Accessories
The products described below are only a few of the
wide range of accessories available for RESISTRON
temperature controllers ("Accessories" leaflet).
Analog temperature meter ATR-x
For front panel mounting or mounting on a top hat rail (DIN TS35).
Analog indication of the ACTUAL temperature of the heatsealing band in °C. The
meter damping of the unit is optimized for the abrupt temperature changes that occur
in impulse mode.
Digital temperature meter DTR-x
For front panel mounting or mounting on a top hat rail (DIN TS35).
Digital indication of the ACTUAL temperature of the heatsealing band in °C, with
HOLD function.
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