By connecting this module in series, it is possible to control our power control modules (230 V/AC or 110 V/AC) M012 + M028 (from microcomputers or PCs) with a DC voltage or a pulse width modulation. This module is connected at the spot of the potentiometer. Galvanic separation of the control circuit via optocouplers. Control may be done optionally (at 230 V/AC) 1 - 5 V/DC, 3 - 12 V/DC, 6 - 24 V/DC. Or TTL rectangular pulses 5 V/DC, 1 - 10 kHz pulse width 10 - 90 % PWM (Puls width modulation). Regulation is done by changing the pulse width.