The time attendance clock according to the design
The time attendance clock according to the design principle can be divided into the following two categories: 1. Controller own card reader (identification device) This kind of design defects is controller must be installed in the door so that part of the line must be open at the door, without professional card or password can easily open the door. 2. Controller and the card reader (identification device) of fission This kind of system controller installed in indoor, only card reader input line Lou in the outside, all other line are indoors, and reader transfer digital signals, thus, if not effective card or password no one can in the door. This kind of system should be the first choice of customers. According to the entrance guard system with microcomputer communication mode can be divided into the following two categories: 1. Single control type This kind of product is the most common, it is suitable for small system or installation position concentrated unit. Usually adopt RS485 communication mode. It has the advantage of small investment, communication line special. Defect is once installed good cannot easily re
Inward and outward time and attendance systems just as its name implies is to inward and outward channels control system, it is in the traditional lock on the basis of the development of. The traditional mechanical lock is only simple mechanical device, no matter how reasonable structural design, material how strong, people can always use through various means to open it. In many people in and out of the channel (like the office, hotel rooms) key management is very troublesome, key lost or personnel change will lock and key change together. In order to solve these problems, it is appeared electronic magcard locks, electronic coded lock, the two locked appear from a certain extent improve the people to the inward and outward channels management degree that the channel management into the electronic age, but with these two kinds of electronic lock the continuous application of, they are the flaws exposed gradually, magnetic card lock problem is information easy to copy.
fingerprint time clock reader with wear between big, failure rate is high, the safety coefficient is low. Coded lock problem is password are easy to leak, and don't look up, safety coefficient is very low. At the same time this period products for most of the card read part (password input) and control part together installed at the door, very easy to people in the outdoor play unlocked. This period of entrance guard system still stays in the early not mature stage, so the entrance guard system is usually known as electronic lock, applications are not widely.
What is time and attendance systems multifunction? The so-called entrance guard multifunction is card read and controller 2 for one of the access control products, have independent model and networking model, relative to the card reader and controller separation networking entrance guard system, its cost is lower, but due to the control part exposed, safety level slightly low, some companies are often used to only one access point users, medium and large many entrance guard system probably will have to be the card reader and controller separation networking entrance guard system, to satisfy the user access in high-end stability and safety need. Multifunction often brought a keyboard Settings and liquid crystal display, can satisfy the domestic part of the customer the demand on appearance, but due to the liquid crystal is vulnerable parts, its stability anti-jamming later than card reader and controller separation networking type access products, imported products (except some Taiwan products outside) generally or the card reader and controller separation mode.
place management center position, is not easy to realize network control.
