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NetSure 7100 Series -48V DC Power System Installation Manual (IM582127000)
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Rev. BB
215
NOTE!
When setting total rectifier or total converter current limit, the set point to each unit is the total
set point divided by the number of units. For example, if the system contains five rectifiers and the
current limit is set to 150 amps then each rectifier has a current limit set point of 30 amps. If one or
more rectifiers or converters are removed or fail it will take several seconds for the individual set points
to the remaining rectifiers or converters to be reset. In the example given, if one rectifier is removed the
current limit set point will drop to 120 amps (30 amps times four remaining rectifiers) until the controller
can send updated set points to the remaining rectifiers. This takes a couple communication cycles
(several seconds) after which each rectifier would have a new set point of 37.5 amps for a total of 150
amps. The total current limit of the rectifiers and converters should not be set such that the loss of the
redundant rectifiers or converters will cause this temporary set point to drop below the actual maximum
expected load. If batteries are used on the rectifier output, the batteries should support the load until
the current limit set points can be re-established due to loss of a rectifier.
NCU Start Wizard
For initial startup, you can perform the Start Wizard from the local keypad and display to enter basic
programmable parameters in one session. Refer to the “Start Wizard” section in the NCU Instructions
(UM1M830BNA).
Verifying the Configuration File
Your NCU was programmed with a configuration file that sets all adjustable parameters. The version number of
the configuration file can be found on the configuration drawing (C-drawing) that is supplied with your power
system documentation, and on a label located on the NCU. You can verify that the correct configuration file
has been loaded into your NCU by performing the following procedure.
NOTE!
The quantity of LVD’s and shunt values for your specific system may be different from the
values shown on the C-drawing.
Procedure
1.
With the Main Menu displayed, press ESC. A screen displays the NCU name, serial number, IP number,
software version, hardware version, and configuration version number.
2.
Press the
DOWN key. A screen displays the NCU file system and MAC address.
3.
Press ESC to return to the Main Menu.
Checking Basic System Settings
Navigate through the controller menus and submenus to check system settings. You can adjust any parameter
as required. Note that these settings can also be checked (and changed if required) via the WEB Interface.
Refer also to “NCU Start Wizard” on page 215.
NOTE!
Repeatedly press the “ESC” key to return in reverse order level by level from any submenu until
the Main Menu appears.
Procedure
1.
To Select a Sub-Menu:
Press the UP and DOWN keys to highlight the desired sub-menu. Press the ENT key to enter the
selected sub-menu.
2.
To Select a User:
To select a User, use the UP and DOWN keys to move the cursor to the Select User field. Press ENT.
