Attributes . Rating up to 75A @48-528 VAC per channel Zero Voltage Turn-On Switching Conformance with IEC60947-4-3 Environment B for low voltage domestic, commercial and light industrial locations/installations Patented Low Noise trigger circuit IP20 touch-safe housing is available Built-in Input/Output over-voltage protection LED Input Status Indicator 3500 VAC Optical isolation EMC Compliant to level III . Names