Publication 1734-UM009A-EN-P - June 2002
1-6 Installing the RS-232 ASCII Module
Wiring the
1734-232ASC Module
Module Terminations
0
Tx
1
1
Rx
2
2NC
3NC
4NC
5NC
6NC
7SG
1 Tx is transmit from the 232ASC module.
2 Rx is receive into the 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.
0
1
23
45
6
7
Tx
NC
NC
NC
Rx
NC
NC
SG
43124
Tx = Transmit Rx = Receive
NC = No Connection SG = Signal Ground
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