Rockwell Automation 1734-485ASC POINT I/O RS-232 and RS-485 ASCII Modules Installation Instructions - Manual (Page 9)

POINT I/O RS-232 and RS-485 ASCII Modules 9
Publication 1734-IN588B-EN-P - July 2003
Wiring the 1734-232ASC Module
Module
Status
Network
Status
1734
232ASC
1734
232ASC
NODE:
TxD
RxD
43123
Rx
NC
NC
SG
Tx
NC
NC
NC
Module Status
Network Status
Tx = Transmit Rx = Receive
NC = No Connection SG = Signal Ground
Shielded Cable: The 1734-232ASC
module requires shielded cable to help
reduce the effects of electrical noise
coupling. Ground each shield at one end
only. A shield grounded at both ends
forms a ground loop, which can cause
module communications to fault. Never
connect a shield to the common side of a
logic circuit (this would introduce noise
into the logic circuit).
Connect the shield directly to a chassis
ground. This chassis ground connection
is not available on the 1734-232ASC RTB
(Removable Terminal Block). On a POINT
I/O system, the chassis ground
connection can be made at the DIN Rail,
at the metal panel the DIN Rail is
mounted to, or at the user’s I/O device.
RS-232