Flowserve MX/QX Profibus DP/PA Field Unit - Manual (Page 27)

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PB DPV1 / PA Field Unit Installation and Maintenance FCD LMENIM2336-03 – 12/12
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• Shielded twisted-pair cables in compliance to PROFIBUS standards must be used.
• Shields are connected to earth ground.
PB/DP connects at the ends of each segment.
PB/PA connects at only a single point in the segment.
• Clean earth-ground connection (less than 5 ohms) provides noise protection and a clear, safe path
for surge currents.
Prepare the network cable for connection to the MX/QX terminals as follows:
a CAUTION: Strip stranded conductors carefully, do not damage the strands. This will weaken
the conductor and can cause the conductor to break. This type of damage may not be
apparent and failure can occur without warning.
1. Remove two to three inches (5 to 8 cm) of the outer jacket of the cable as shown in Figure 2.14.
Do not cut or nick the shield or the insulated conductors.
Figure 2.14 – Removing Outer Plastic Jacket
NOTE: Excess cable should be cut and removed, not coiled or looped, to prevent noise induction into
the network.
2. Separate the cable parts. Unbraid the shield and peel back the shield to the same point where the
outer jacket was removed as shown in Figure 2.15.
Figure 2.15 – Separating Cable Parts