Migatronic PI 250 MMA, Instruction Manual

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8
PI 250 MMA
PI 350/500 MMA
PI 350 MMA CELL
Connection of remote control (PI 250)
Remote control is connected to the 7-poled plug (5).
Connection of remote control (PI 350/500)
PI 350/500 machines equipped with 8-pole control
interface (5) can be controlled via a remote control or
a welding robot. The remote control socket has
terminals for the following functions:
A: Input signal for welding current, 0 -
+10V input impedance: 1Mohm
B: Signal ground
C: Arc detect – contact of relay (max.
1Amp), fully insulated
D: N.C.
E: Arc detect – contact of relay (max. 1Amp), fully
insulated
F: N.C.
G: 24VDC. Short circuit protected with PTC
resistor (max. 50mA).
H: Supply ground
Usage of the machine
When welding, a heating of various components of the
machine takes place and during breaks these
components will cool down again. It must be ensured
that the flow is not reduced or stopped.
When the machine is set for higher welding currents,
there will be a need for periods during which the
machine can cool down.
The length of these periods depends on the current
setting, and the machine should not be switched off in
the meantime. If the periods for cooling down during
use of the machine are not sufficiently long, the over-
heating protection will automatically stop the welding
process and the yellow LED in the front panel will
come on. The yellow LED switches off when the
machine has cooled down sufficiently and is ready for
welding.