Kontron coolMonster/PM, Руководство пользователя

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13 12BSerial-Communication Interfaces
Kontron User's Guide
coolMonster/PM
34
13.3
69B
RS-485 Connector
You can use Connector X17 (COM D) for RS422/485 purposes.
Header Pin Signal Name Function
1 4 Channel A positive terminal
2 485_1RXD- Channel A negative terminal
3 GND Ground
4 4 Channel B positive terminal
5 485_1TXD- Channel B negative terminal
The serial port COM D can only be used either as RS232 (Connector X21) or as RS422/RS485 (Connector
X17).
13.4
70B
Configuration
From the BIOS set-up utility, you can set the serial input/output interfaces to enabled, disabled or auto.
The base I/O-addresses 3F8h, 2F8h, 3E8h, or 2E8h can be configured when enabled, as well as the
interrupts IRQ3, IRQ4, IRQ10 and IRQ11. COM D can be set to the RS232 or RS485 interface. Refer to the
I/O Device Configuration submenu in the Appendix B: BIOS Operation chapter for information on
configuration.
13.4.1
139B
RS-485 Diagram
RS485/RS422
4
485_1RXD-
4
485_1TXD-
GND
1
2
3
4
5
X18
XSTJST
RS422 (full duplex): Ux and Uy activ
REA#
232_485E
VCC
VCC
1
2
3
4
5
6
7
8
RN7
RN4K7VF
2 3
1
U19A
U74LS125
232_BEN
/DTR4
232_485E
VCC
RS485 (half duplex): Ux activ
RS422 (full duplex): Ux and Uy activ
4
485_1TXD-
485_1RXD-
4
VCC
VCC
VCC
GND
GND
GND
VCC
REA#
232_485E
RO
1
/RE
2
DE
3
DI
4
VCC
8
B
7
A
6
GND
5
U21
UMAX483
RO
1
/RE
2
DE
3
DI
4
VCC
8
B
7
A
6
GND
5
U22
UMAX483
R108 R5%120RS03
R109 R5%120RS03
R110
R5%240RS03
R111
R5%240RS03
/RTS4
SIN4
SOUT4
SOUT4
5 6
14
7
U11C
U74HCT14
VCC
GND
232_485E
enable signal from BIOS setup
for informations about MAX483 pls. refer www.maxim-ic.com
U42
U43
X17
U41A
RN89
U4F
R216
R218
R217
R219