Appendix A. Preventive and Cautionary Tips
To guarantee the card reader works properly, please read and obey the notes below.
• If the card reader is powered by the controller, the power supply distance is recommended to be
no longer than 100m. If the distance is longer than 100 m, you are advised to power the card
reader by external 12 V (range: -%10 to +%10) DC power supply, which is non-switched and
linear.
• To guarantee the communication between the controller and the card reader, you must use
RVVP cable above 0.5 to connect them.
• If the card reader is installed outside or in environment easy to permeable, it is advisable to
install a waterproof shield.
• If you need to install several card readers, the distance among them must over 30 cm.
• To reduce the noise in long distance transmission, the shield of cable should connect to the GND
of both controller and card reader terminal.
• Please take care of your card and report card loss in time when card is lost.
• If you require a higher security level, use multiple authentication modes.
• Multiple card types are supported. Please select an appropriate card type according to the card
performance and the usage scenarios.
DS-K1108AD Series Card Reader User Manual
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