Semtong is one of leader in the field of access control ,turnstile,parking system,barrier,patrol,smart card system products and fingerprint products in China. We aim at becoming one of the leading parking system and access control ,turnstiles solution providers in china and abroad. Through sincere and effective cooperation, we have built up a strong sales and distribution networks and amicable business relationship with our customers. By the end of 2005, Semtong Technology Co. Ltd has received the visitors from more than 50 countries more than 100 times. Now you can find Semtong products in Africa, America, Asia, European, altogether over fifty countries in the world. Semtong people are doing their utmost to become an international brand.
RS485 series access control includes SC- N601 single door bi-directional access controller, SC- N602 two-door bi-directional access controller and SC- N604 four-door uni-directional access controller. Adapting the latest ARM chipset technology, and dual core architecture, it provides faster speed, stronger function and expansibility. It mainly applies in frequency card identification, user data loading, information storage, door lock control, passage control, and linkage fire alarm interlock control. Each controller supports stand-alone running, and also supports running on-line or off-line via multi-node and trans-regional RS232/485 communication. One RS485 bus line can support up to 2000 controllers.