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Manual No. x75mk3-11

x75-man-Rev11-0815.indd

 

In the center of the unit are three bus bar terminals.

 

To the left side is the VB or BAT terminal.  This is connected to the ‘hot’ 

or ‘feed’ side of the battery.

  In the middle is the –V or –VO terminal. This is the ‘negative’ output of 

the rectifier bus.

 

To the right side is the +V or +VO terminal.  This is the ‘positive’ output 

of the rectifier bus.

 

Battery connection for -48VDC systems is as follows:

 

+Ve battery terminal connects to the +V terminal.

 

–Ve battery terminal connects to the VB terminal.

 

 

Battery connection for +24VDC and +12VDC systems is as follows:

 

+Ve battery terminal connects to the VB terminal.

 

-Ve battery terminal connects to the –V terminal.

 

  When the system is required to provide a bulk feed output without using 

the internal distribution the +V and –V terminals are used to provide this 

feed to the load.

  When an expansion shelf is used to increase the overall capacity of the 

system the +V and –V terminals of the expansion unit should be bussed 

together with the +V and –V terminals of the system unit respectively using 

the supplied link bars.

 

Immediately to the right of the bus bar terminals is a bank of 15 Spring Clamp 

Terminals designated J4.  These terminals provide connections for the battery 

temperature compensation probe and the relay alarm outputs.  They are described 

in detail in section 11.

 

Next to J4 is a 25-way Sub-miniature D-Type connector, designated J1, which is used 

to connect various signal and control lines between a base unit and an expansion 

shelf.