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User Manual 990-9178A
DC MX06 40A Shelf Page 16 of 44 18
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FEB 02
2.5 Customer Inputs
2.5.1 Current Limit Programming
Input Description Controller
Type
Connector
Current Limit
Program
Connect a DC voltage to this pin (referenced to
signal common or –Ve output) to reduce the system
output current limit point.
Current limit is programmed down 1A per 1.5V
program voltage. Max program voltage 7.5V.
Rear Access
Front Access
SK17-2
SK4-20
5V aux
5V aux can be used to program down current limit
level by linking to program pin.
Rear Access
Front Access
SK17-5
SK4-15
The system output current limit can also be set to either the standard “High” (100%) level or “Low” (70%)
level by using SK13.
For “High” current limit level link pins 1 and 2 (default setting)
For “Low” current limit level link pins 2 and 3
Selecting “Low” current limit level will program down each rectifiers current limit level to roughly 70% of the
default level. (See section 2.1.1 for default levels). This is the same as connecting the 5V aux pin to the
current limit program pin as detailed above.
2.5.2 Output Voltage Programming
Input Description Controller
type
Connector
Voltage
Programming
Connect a DC voltage to this pin (referenced to
signal common or –Ve output) to adjust the system
output voltage.
This pin floats at 2.5V nominal with respect to
negative output (O/P @ 54.5V)
Applying a DC voltage adjusts the output by –1V/V.
(For 1V swing on program pin the output voltage
changes by –1V)
The programming voltage range is 0V – 14V, giving a
max adjustment range of 57V to 43V.
Note: See section 2.4 for SK4, SK17 location photo
Rear Access
Front Access
SK17-7
SK4-18
SK13
Note/ using both programming methods
together will not double the effect