One Power Supply (End-Connected) - Parker H Series Installation & Service Instructions Manual

One power supply (end-connected)

The following example uses the look-up method to determine the
configuration for one end-connected power supply. One end-connected power
supply provides as much as 8A near the power supply.
power
supply
23m
(75 ft)
TR
PT
0.10A
TR = terminating resistorT = T-Port tap
PT = PowerTap tapD = device
1. Determine the total length of the network.
106m
2. Add each device's current together to find the total current.
0.10 + 0.15 + 0.30 + 0.10
Make sure that the required power is less than the rating of
IMPORTANT
the power supply. You may need to derate the supply if it is
in an enclosure.
3. Find the value next largest to the network length using Figure 4.1 on
Page 4-4 to determine the approximate maximum current allowed for
the system.
120m (2.47A)= 0.65A
Determine Power Requirements
106m
(350 ft)
53m
(175 ft)
30m
(100 ft)
T T
D1 D2
0.15A
Publication DNET-UM072C-EN-P - July 2004
4-11
T T
TR
D3 D4
0.10A
0.30A
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