Rotary Encoder Input - ESAB Caddyt Arc 150i Service Manual

Rotary encoder input

The pulse generator on the control panel is supplied at +5 V. Pulses are
supplied from the pulse generator to connections MMC18 and MMC19 with a
90_ mutual phase displacement. The pulse generator generates pulses only
when its shaft is turned. Resistors R114 and R116 are pull--up resistors.
Push button filters
All pushbuttons are connected to 0 V, so that pressing any of them pulls down
the corresponding input (MMC22 -- MMC32) to 0 V. The signal is filtered by a
filter network and then applied to the processor.
S0740 800 161/E061205/P66
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