KEPCO KFD 6-25-28W - Manual (Page 10)

6
KFD 62528W/060801
15.0 REMOTE SENSE
Remote Sense pins are provided to minimize the effects of distribution losses that come about from regu-
lating the output voltage at the remote sense terminals. The KFD output voltage specifications refer to
measurements taken at the Remote Sense terminals during parallel operation, or with the parallel pin
shorted to the Sense (-) pin. The voltage between the Remote Sense pins and the KFD output terminals
must not exceed the output voltage Sense range given in the KFD specifications. The combination of out-
put set point adjustment range and output voltage Sense range given in the Feature Specifications Table,
Table 7 cannot exceed 16.5 Volts between the Vo (+) and Vo (-) terminals.
16.0 SAFETY CONSIDERATIONS
For Safety Standard approval, the system that the Power Module is used in, must satisfy the following con-
dition:
The Power Module must be installed in compliance with the spacing and separation requirements of the
End Use Safety Agency Standard i.e., UL-1950, CSA 22.2-950, EN 60 950.
For the Converter output to satisfy the requirements of the Safety Extra Low Voltage Standard (SELV), one
of the following conditions must be valid for the D.C. input:
The Converter input meets all requirements of SELV, or
The Converter must be provided with reinforced insulation to protect against hazardous voltages, including
the A.C. mains; and comply with SELV reliability tests.
17.0 OUTPUT VOLTAGE TRIM
The output trim feature provides for the capability of increasing or decreasing the output voltage setpoint of
the Power Module. This can be accomplished by using an external resistor between the TRIM pin and
either the SENSE (+) or SENSE (-) pin (see Figures 7 and 8).
With an external resistor connected between the TRIM pin and SENSE (–) pin (R
TRIM-UP
), the output volt-
age setpoint (V
o
,
TRIM
) increases to the higher voltage defined in this equation:
With an external resistor connected between the TRIM pin and the SENSE (+) pin (R
TRIM-DOWN
), the out-
put voltage setpoint (Vo,
TRIM
) decrease to the lower voltage defined by this equation:
The Combination of output set point adjustment range and output voltage Sense range, given in the Fea-
ture Specifications Table 7, cannot exceed 16.5 Volts across the Vo (+) and Vo (-) terminals (see Figures
6, 7 and 8).
R
T R I M U P –
1.25
Vo
T R I M
,
5 –
-----------------------------------------


5620


=
R
T R I M D O W N –
V
o T R I M ,
1.25 –
5 Vo T RIM
,
–
--------------------------------------------
 
 
5620 =