User`s manual

8
CHAPTER2 PROFIBUS Unit
2-3 BROFIBUS cable connections
PROFIBUS cable connections require a 9-pin D-sub connector with pin assignments as
shown in the table below.
Pin No.
1
2
3
4
5
6
7
8
9
Signal
—
—
RxD/TxD-P
RTS
GND
5V
—
RxD/TxD-N
—
Meaning
—
—
Signal in line A
—
Signal in line B
—
PROFIBUS-DP
connector
Plug the bus connector
on the PROFIBUS cable
into this connector.
5
4
3
2
1
9
8
7
6
!
CAUTION
When wiring the bus connector, always follow the manufacturer's instructions to
avoid miswiring.
After plugging in the bus connector, be sure to tighten the screws to prevent the
connector from coming off.