What is the total capacity of the access control system (line capacity software capacity)? How many controllers can a TCP LAN connect to? Can the 485 controller and TCP controller be mixed into the same software system? 

First, software capacity: 

that is, how many points of access control or how many access controllers can be managed by a set of software. The software of some companies has restrictions on the software capacity of the access control system, and the access control software of our company has no restrictions on the capacity of the access control system temporarily. 

Second, line capacity: 

485 communication access control system capacity and the following factors are closely related:

1, the controller on the 485 chip design capability. 

485 communication chip load capacity, there are 32 units, 64 units, 128 units, 256 units, the design of strong chip system load. 

2. There is a gap between the nominal load number of the chip and the stable load number of the actual application. 

Due to the wiring specification (must be connected hand in hand, star connection interference) line quality is good or bad (must use twisted pair, parallel line interference is too large) interference environment (should be away from the strong line 30 cm or more distance, The more far the better) power abundance degree of communication baud rate size of communication line length other side effects (lightning protection circuit may reduce the load capacity of the system) and other factors, the nominal number of chips is certainly not the actual number of loads. For example, the number of controllers with a stable load capacity of 256 is between 100 and 150. To ensure stability, it is recommended to be within 80 units (each 485 lines). The company's controller product design capacity is designed according to 256 units, the baud rate adopts the 9600 standard baud rate, and the stable line load capacity can reach 80 units. 

3. RS232-RS485 converter design capacity related. 

The design capacity of the 485 converter also has 32 units, 64 units, 128 units and 256 units. If the controller 485 chip design capacity is 256 units. The design capacity of the converter is 32 units, the total load capacity of the system is less than 32 units. That is, the low is not high principle. 

A cheap (20-50 yuan) passive converter is common on the market, the design capacity is generally 32 sets, and there is no anti-interference, signal amplification and other design, the actual stable load capacity is within 5 sets, and even some of the larger interference environment 1 set are not connected, so the use of passive 485 converter to the access control system is strictly prohibited. 

It is extremely wrong to parallel two 485 lines with one 485 converter. 

If a 485 communication access control system has hundreds of access controllers, how to deal with it? See if a 485 communication access control system has hundreds of access controllers, how to deal with it? How to network? 

Third, what is the capacity of TCP access control system? How many access control units can be connected to one system? 

In theory, the TCP controller is not limited to the system capacity, the LAN can allocate how many IP can be connected to how many access controllers. This is one of the advantages of TCP network access controllers. 

Fourth.Can 485 controller and TCP controller be mixed into the same software management system? 

For the nabon's product is now OK. For other manufacturers of access control controller is not necessarily, need to be implemented with the relevant manufacturers. This mixing reduces some of the performance benefits of the TCP controller to accommodate the 485 controller. It is only recommended to do this on special occasions or when the customer has special needs.