B&R Automation PC 3100 User Manual page 99

Model number
Relative humidity
Operation
Storage
Transport
Mechanical properties
Weight
1) For detailed information, see the temperature tables in the user's manual.
4.7.4.15.3.1 Pinout
Variant
Type
UART
Galvanic isolation
Transfer rate
Bus length
Pin
1
2
3
4
5
6
7
8
9
4.7.4.15.3.2 I/O address and IRQ
Slot (interface)
IF option 2 add-on (COM C)
IF option 2 (COM D)
1) The default I/O address and IRQ can be modified in BIOS.
4.7.4.15.3.3 Cable data
For more detailed information about the transfer rate, bus length or cable requirements for the respective inter-
faces/buses, see "Cable data" on page
4.7.4.15.3.4 Operation as RS485 interface
The pins of the RS422 default interface (1, 4, 6 and 9) must be used for operation. To do this, connect the pins
as shown.
The RTS line must be switched by the driver for each transmission or reception; switching back does not take place
automatically. This cannot be configured in Windows.
With long cable lengths, the voltage drop can result in greater potential differences between the bus devices, which
can hinder communication. This can be improved by running the ground wire with the others.
The cable ends of an RS485 bus should be terminated (at least for longer cable lengths or higher transfer rates).
Passive termination can normally be used by connecting the signal lines via a 120 Ω resistor at each of the two
bus ends; see "Terminating resistor" for the IF card.
Automation PC 3100 User's manual V 2.10
Table 44: 5ACCIF02.ISS0-000 - Technical data
Serial interfaces COM C and COM D
RS232
DSUB, 9-pin, male
RS232, not modem supported
16550-compatible, 16-byte FIFO buffer
Yes
Max. 115 kbit/s
Max. 15 m
RS232 - Pinout
NC
RXD
TXD
NC
GND
NC
RTS
CTS
NC
245.
9
RXD
4
TXD
6
RXD
1
TXD
Figure 2: RS232/RS422/RS485 interface - Operation in RS485 mode
5ACCIF02.ISS0-000
5 to 90%, non-condensing
5 to 95%, non-condensing
5 to 95%, non-condensing
Approx. 100 g
RS422/485
Max. 1200 m
RS422 - Pinout
TXD\
NC
NC
TXD
GND
RXD\
NC
NC
RXD
I/O address
1)
2E8h - 2EFh
338h - 33Fh
DATA
DATA
Technical data
IRQ
1)
5
7
99