B&R Automation PC 620, User Manual

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Technical data • Individual components
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187 Automation PC 620 with 945GME N270 CPU board User's Manual V 1.10
3.7.2 Add-on RS232/422/485 interface - 5AC600.485I-00
The serial interface is a combined RS232/RS422/RS485 interface. The operating mode
(RS232/RS422/RS485) is selected automatically, depending on the electrical connection.
Pin assignments
I/O address and IRQ
Figure 76: Add-on RS232/422/485 interface - 5AC600.485I-00
Add-on RS232/422/485
Features RS232 RS422/485
9-pin DSUB connector
Type RS232 not modem compatible;
Electrically isolated
UART 16550 compatible, 16 byte FIFO
Transfer rate Max. 115 kBit/s
Bus length Max. 15 meters Max. 1200 meters
Pin Assignments
(RS232)
Assignments
(RS422)
1 n.c. TXD\
2 RXD n.c.
3 TXD n.c.
4 n.c. TXD
5 GND GND
6 n.c. RXD\
7 RTS n.c.
8 CTS n.c.
9 n.c. RXD
Table 90: Pin assignments - RS232/RS422
Resource Default setting Additional setting options
I/O address 2E8 238, 2F8, 338, 3E8, 3F8
IRQ IRQ10 IRQ 3, 4, 5, 7, 11, 12
Table 91: Add-on RS232/422/485 - I/O address and IRQ
1 5
9 6