ACM120S-SM ( Contactless Small Module)

Compact size ( 70 mm x 45.3 mm) Serial RS232 interface Read and write functionality Built-in antenna for contactless tag access, with card reading distance of up to 50 mm Supports major contactless smart cards conforming to ISO 14443 Type A in the market Supports Mifare cards, including new Mifare Ultralight C and Mifare Plus SL1 Built-in anti-collision feature ( at least 1 card is detected when multiple cards are presented) Selective card polling capability ( especially useful when multiple cards are presented) Easy-to-install for standard single-gang electrical switchbox Operation LED Buzzer Relay