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RS232-Cabling with
Hardware Handshake
Illustration 12:
RS232 Cabling with Hardware Handshake
RS422 Interface
The connection is realised via a 9-pin D-SUB plug.
Pin
Signal
Function
Direction
1
I(B)
Indicate (-)
I
2
R(A)
Receive Data (+)
I
3
T(A)
Transmit Data (+)
O
4
T(B)
Transmit Data (-)
O
5
G
Ground
-
6
R(B)
Receive data (-)
I
7
C(A)
Control (+)
O
8
I(A)
Indicate (+)
I
9
C(B)
Control (-)
O
Table 15:
Pin Assignment RS422 Interface
O = Output I= Input
Connector Assignment and Cabling