ART2524 is a relay output card based on PC/104 bus, which can collect, monitor and control external signals through microprocessor. Digital input can be common anode or common cathode input mode. Through photocoupler, external input signal can be collected. Each relay output can control the on-off of direct current voltage and alternating current voltage according to function. It is mainly used in field measurement and control, signal acquisition, medical equipment, servo control, electronic product quality testing and other fields.