Rockwell Automation 1747-L5xx SLC 500 Modular Hardware Style User Manual - Manual (Page 225)

Publication 1747-UM011G-EN-P - June 2008
Setting Up the DH+ Network 225
Minimizing Noise
To minimize the affect of noise on the SLC 5/04 processor, ground the cable
shields to earth via 0.01
μ F capacitors as shown in the DH+ wiring example
below. Only directly ground the shield at one point on the network.
SLC 5/04 CPU
PROC
PROG
FORCE
COMM
BATT
RUN
R
E
M
PLC±5/20
PROGRAMMABLE
CONTROLLER
1
2
1
2
A B
SLC 5/04 CPU
1
2
RUN PROG
FORCE
RS232 BATT
DH+ FLT
RUN
REM RUN PROG
FORCE
RS232 BATT
DH+ FLT
RUN
REM
Clear
Shield
Blue
Clear
Shield
Blue
Clear
Shield
Blue
Terminating
Resistor Terminating
Resistor
Connector Connector Connector
Belden #9463 Cable
Belden #9463 Cable
0.01 μ F
Shield (1)
Shield
0.01 μ F
Shield
Earth Ground
Earth Ground
Earth Ground
(1) To chassis ground directly at one point only in the network.