Chapter 3 Connecting peripherals 21
RS-232/422/485 serial port connections
RS-422 is commonly used for two-way communication between
two devices, whereas RS-485 is used for communication between a
single master and a network of slave modules.
Before you use the RS-232/422/485 port, you will need to select
RS-232, RS-422 (the default) or RS-485 mode. Set jumpers JP20,
22, 25, 26, 27, 28, 29 and 30 according to the following table:
RS-232
RS-422
RS-485
JP20
1 - 2
2 - 3
2 - 3
JP22
Open
Short
Short
JP25
Open
Open
Short
JP26
Open
Open
Short
JP27
Open
1-2
2-3
JP28
1-2
2-3
2-3
JP29
Open
Short
Short
JP30
Open
Short
Short
Pin assignments for the DB-9 connector RS-422/485 are as
follows:
RS-422/485 connector pin assignments
Pin
Signal
1 TX - or send data - (DTE)
2 TX + or send data + (DTE)
3 RX + or receive data + (DTE)
4 RX - or receive data - (DTE)
5 Ground
6 RTS - or ready to send -
7 RTS + or ready to send +
8 CTS + or clear to send +
9 CTS - or clear to send -
Содержание PCA-6143P
Страница 24: ...24 PCA 6143P User s Manual ...
Страница 39: ...Appendix A Flash ROM disk 39 A P P E N D I X A Flash ROM disk ...
Страница 46: ...46 PCA 6143P User s Manual ...
Страница 54: ...54 PCA 6143P User s Manual PCA 6143P dimensions mm ...
Страница 66: ...66 PCA 6143P User s Manual ...
Страница 86: ...86 PCA 6143P User s Manual ...