IB1000/2/3 boards carry two DB9-M connectors onboard. Two additional connectors attach (via cables) to two 2x5 pin headers located on the boards.
DB-9M connectors
Pin # |
RS232 mode |
RS422 mode (IB1002/3 only) |
RS485 mode (IB1002/3 only) |
1 |
--- |
RTS- (output) |
--- |
2 |
RX (input) |
RX- (input) |
RX- (input) |
3 |
TX (output) |
TX+ (output) |
TX+ (output) |
4 |
DTR (output) |
TX- (output) |
TX- (output) |
5 |
SYSTEM GROUND |
SYSTEM GROUND |
SYSTEM GROUND |
6 |
DSR (input) |
RX+ (input) |
RX+ (input) |
7 |
RTS (output) |
RTS+ (output) |
--- |
8 |
CTS (input) |
CTS+ (input) |
--- |
9 |
--- |
CTS- (input) |
--- |
Pin headers
Pin # |
RS232 mode |
RS422 mode (IB1002/3 only) |
RS485 mode (IB1002/3 only) |
1 |
--- |
RTS- (output) |
--- |
2 |
RX (input) |
RX- (input) |
RX- (input) |
3 |
TX (output) |
TX+ (output) |
TX+ (output) |
4 |
DTR (output) |
TX- (output) |
TX- (output) |
5 |
SYSTEM GROUND |
SYSTEM GROUND |
SYSTEM GROUND |
6 |
DSR (input) |
RX+ (input) |
RX+ (input) |
7 |
RTS (output) |
RTS+ (output) |
--- |
8 |
CTS (input) |
CTS+ (input) |
--- |
9 |
--- |
CTS- (input) |
--- |
10 |
--- |
--- |
--- |