Switch value input, relay output safety barrier (two in and two out), the dry contact or NAMUR type proximity switch signal in the dangerous zone, through the isolation output relay contact to the safety zone. You can use DIP switch S1 and S3 to set the in-phase or inverted logic control of the output and input of CH1 and CH2 (default in-phase), dip switch S2, s4 sets the line fault monitoring of CH1 and CH2 to on or off (the default is on, and the LED flashes when the line fault occurs). This product requires independent power supply, and the three terminals of input, output and power supply are isolated.
