Shanghai ZLAN Information Technology Co., Ltd Tel: +86-17321037177 http://www.zlmcu.com
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high reliability and safety. The photoelectric isolation function can effectively make
master and sub devices separate from each other, avoid damage from ground
potential difference of master-slave devices and static, lightning, surge to devices,
also can avoid damage from ground loop current caused by ground potential
difference.
ZLAN9440 has 4 main application styles:
1) Isolation: effectively isolate master and slave ends of RS485 network; meanwhile
isolate 4 slave stations.
2) Relay: can effectively extend communication distance of RS485 network.
3) Extension: can implement 1 channel RS485 extending to 4 channels RS485,
multiply the numbers of RS485 devices in the network.
4) Conversion: also can realize 1 channel RS232 converting to 4 channels RS485.
Figure 2 ZLAN9440 connection diagram
