Rockwell Automation 1734-485ASC POINT I/O ASCII User Manual - Manual (Page 16)

Publication 1734-UM009B-EN-P - July 2003
1-6 Installing the ASCII Module
Wiring the
1734-232ASC Module
Wiring the
1734-485ASC 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
NC
NC
NC
SG
S+
S-
NC
CG
Module
Status
Network
Status
S+ = Transmit S- = Receive
CG = Chassis Ground NC = No Connection
SG = Signal Ground
Shielded Cable: The 1734-485ASC 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
1734-485ASC 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.
Rx+
Rx-
NC
SG
Tx+
Tx-
NC
CG
Tx = Transmit Rx = Receive
CG = Chassis Ground NC = No Connection
SG = Signal Ground
Module
Status
Network
Status
RS-485 RS-422
43487 43487