Delta HPH-20KA01KAT, User Manual

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Delta Electronics. Inc.
HPH-
20KA01KAT
20
5.4.
Connecting For Master/Slave
The HPH-20KA01KAT A design lets you configure up to sixteen HPH-20KA01KAT as a
master/slave system (the maximum power capability depends on the master unit’s configuration
file). Any HPH-20KA01KAT A unit that features the master/slave Host card can function as either a
master unit or a slave unit. HPH-20KA01KAT units without the master/slave card cannot function
as a master or slave.
The master/slave card is located near the top right side of the unit’s rear panel. It includes
three ports:
1.
A 9-pin, female, subminiature-D serial communications port for RS-485.
2.
Two modular ports “Master” and “Slave” for interfacing master and slave units in a daisy
chain (see figure 5.3).
5.5.
Configuring Your Master Unit
To configure the master unit, do the following steps (see Figure 5-3):
1.
Remove all input power from the master and slave units.
2.
Connect the interface cable between “Master” port on the master unit and “Slave”
port on the first slave unit.
3.
Your master unit will not have an interface cable connected to “Slave” port.
4.
Use a grounding strap to connect an equi-potential ground stud on the master unit to
an equi-potential ground stud on the first slave unit.
Note:We recommend you use a ground wire that can conduct the current of one
phase( for example, 40A for HPH-20KA01KAT) that is no longer than 3 feet. We
recommend you connect the ground stud on the master unit to system ground. See
Figure 5.2 for more information.
5.
Set the front panel => Interface Setup => Prallel Mode Setup => Master
If you want to configure your master unit as a stand-alone unit, do the following steps:
1.
Set the front panel => Interface Setup => Prallel Mode Setup => Master
2.
Remove all Master/Slave interface cables from “Master” unit.
5.6.
Configuring Your Slave Units
To configure a slave unit, do the following (see Figure 5.3)
1.
Remove all input power from the master and slave units.
2.
Connect the interface cable between “Master” port on the first slave unit and “Slave”
port on the next slave unit. Continue cabling slave units together in this daisy-chain
manner.
Note:The master/slave interface cables are include with the units. The last slave unit
on your system will not have an interface cable connected to “Master”port.
3.
Use a grounding strap to connect an equi-potential ground stud on the first slave unit
to an equi-potential ground stud of the next slave unit.