Other Hardware View Some of Our Products OPTO3 OPTO3 Opto coupler • input of either 110VDC or 220VDC • three OPTO coupler channels • DIN rail mount Datasheet OPTO4 OPTO4 Opto coupler • input of either 110VDC or 220VDC • four OPTO coupler channels • COMBIFLEX relay plug-in housing Datasheet OPTO16 OPTO16 Opto coupler • input of 220VDC and/ or 110VDC; 48VDC, 24VDC and 15VDC • 8 or 16 opto coupler channels Datasheet