Rockwell Automation 1403-NSC Smart Communication Card Instruction Sheet - Manual (Page 6)

Smart Communications Card 6
Publication 1403-5.1
Figure 6. RS-485 Wiring
150
Ω
RESISTOR
Powermonitor II
DEVICE #1
Powermonitor II
DEVICE #2
Powermonitor II
DEVICE #3
EXTERNAL
RS–232C TO RS–485
CONVERTER
IBM PC
PLC PROCESSOR
RS–232C
150
Ω
RESISTOR
0.047uF
150K
Ω
0.047uF
150K Ω
0.047uF
150K
Ω
Note: All ground wires should be kept as short as
possible between the R/C and the cover plate.