Two Power Supplies (End-Connected) In Parallel With No - Parker H Series Installation & Service Instructions Manual

4-16 Determine Power Requirements
Wire Wire Use
Color identity
white CAN_H signal
blue CAN_L signal
bare drain shield
black V- power
red V+ power
Publication DNET-UM072C-EN-P - July 2004
.
IMPORTANT
CAN_H
CAN_L
trunk line
drain
V-
V+
Two power supplies (end-connected) in parallel with no V+ break
The following example uses the look-up method to determine the
configuration for two end-connected power supplies. You must use diodes at
the power taps to prevent back-feeding of the power supplies. Check your
national and local codes for any restrictions on the use of parallel power
supplies. The NEC/CECode requires that the power supplies must be listed
for parallel operation.
To use this configuration, you must make the following
PowerTap tap modifications:
• place no loads between the PowerTap taps
• remove fuses between the two PowerTap taps to
segment the V+ conductor in the trunk line between
the taps
• cut V+ (red) flush with cable jacket
remove
these
V+ V-
fuses
power
supply
ground
V- V+
power
supply
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