Why you Need RAYON's 5V Power Only UPCI Card 2009/11/02

In traditional RS232 serial port we may need to have 5V,+12V,-12V power supply for our interface chip. But we may not have -12V power supply in our new PC system. Some PC system may also remove +12V power supply. In this condition we can not use normal RS232 serial port card. To meet this condition RAYON's new P5x88U card just need to use 5V power supply. P5x88U card can support 3.3V & 5V PCI bus slot. Due to cost and flexibility requirement we have different models to support different serial port interface application.

Model

RS232

RS422

RS485

P5188U

8

8

0

P5288U

8

0

8

P5388U

0

8

8

P5488U

8

4

4

P5588U

8

0

0

P5688U

8

6

2

P5788U

8

7

1

P5888U

4

4

8

P5988U

4

8

4

 

 For RS232 only customer we offer P5588U card to support 8 RS232 serial ports. P5588U card is similar as RAYON's P588U card.
 For some user they just need point to point full duplex connection. But RS232 can only connect up to 50 feet. So we may need to use RS422 interface to connect up to 4000 feet. In this condition we may suggest P5188U card. P5188U card can support eight serial ports to be RS232 or RS422 interface settable by DIP switch. So it is very easy for you to connect local RS232 equipment or long RS422 equipment. 

For some user their major application is RS232 connection. But they may need to use RS485 interface for long distance connection or multi-drop RS485 equipment connection. In this condition we may suggest P5288U card. P5288U card can support eight serial ports to be RS232 or RS485 interface settable by DIP switch. So it is very easy for you to connect local RS232 equipment and multi-drop RS485 equipment. 

For some user they may use RS422 for long distance connection. But they may need to use RS485 for multi-drop connection. In this condition we may suggest P5388U card. P5388U card can support eight serial ports to be RS422 or RS485 interface settable by DIP switch. It is very flexible for you to connect long distance via RS422 full duplex protocol or RS485 half duplex protocol. P5388U card is similar as RAYON's P8485U card. 

For some user their application environment is major in RS232 connection. But they may need to have capability to connect with RS422 equipment for long distance connection or RS485 multi drop connection. In this condition we may suggest P5488U card. P5488U card can support four RS232 serial ports and four RS232/RS422/RS485 settable serial ports. Originally they may use all eight ports in RS232 connection. Then they may change to RS422 for long distance connection. Or they may need to use RS485 for multiple RS485 equipment connection. It is very easy to change interface by DIP switch. It is very flexible for application environment modification. For P5588U card user they may need to pay a little more money to reserve flexibility in the future.