Controller functions
Page 20
RES-401
Version 1
6.2
Temperature setting (set point selection)
The heatsealing temperature is set by means of a 2k
Ω
potentiometer at terminals 16+17. The connecting wires
between the controller and the potentiometer must be shielded (
section 5.6 "Wiring diagram" on page 13).
Setting range:
0
Ω
0°C
2k
Ω
300°C (PD-3)
The relationship between the potentiometer setting and the SET temperature is linear.
The terminals 16+17 are not potenial-free and might have the potential of the secondary voltage of
the impulse transformer.
For the terminals of the external potentiometer touch voltage protection must be installed.
External grounding is not allowed. If this warning is ignored, the controller will be damaged by frame
currents.
If a ROPEX PD-3 precision potentiometer is used, the SET temperature can be adjusted exactly with the help of
the digital display in the window of the dial. The number which appears on the display corresponds to the SET
temperature in °C.
The set point that is selected for the heatsealing temperature must be greater than 40°C. If not, the heatsealing
band will not be heated up when the "START" signal is activated.
If a potentiometer is not connected, the set point is assumed to be zero. When you connect the
potentiometer, please note the direction of rotation!
PD-3
Potentiometer P03
with
digital dial KD
3
1
3
1
2
2
RES-401
0V
Set point
selection
input
17
16
cw
2K
Cable shielded
!
!
!
!
