MPE XR III series, Руководство оператора

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3.4.1 Resistive Programming
Resistive programming requires connection of an external potentiometer or resistors between
terminals 21, 3, and 1 of JS1. Terminal 21 is a 10.0 V precision reference, terminal 1 is the
reference ground, and terminal 3 is the voltage set point input. Like front panel rotary control,
the precision reference produces a voltage across the potentiometer or resistors which is then
used to produce the voltage set point. Metal film resistors or a wire wound potentiometer will
result in the lowest temperature coefficient.
The current set point, over voltage trip, and over current trip can be programmed in the same
manner. Referring to the Table 3.1 for terminal identification, use terminal 22 to program the
current set point, terminal 4 to program over voltage trip, and terminal 23 to program over
current trip. The power supply has been calibrated to produce full scale output voltage and
current with 10.0 V inputs at the external reference input terminals. Furthermore, over voltage
and over current trip have been calibrated to trip at 110% full scale output voltage and current
with 10.0 V inputs at the external reference input terminals.
If the applied voltage at any input is greater than 12.50 V, the pgl (program line) LED will light
and the power supply will turn off.
Table 3.1 EXTERNAL PROGRAMMING PARAMETERS
TERM PARM DESCRIPTION
INPUT
RANGE (V) OUTPUT
RANGE
3
22
4
23 VREF EXT
IREF EXT
TVREF EXT
TIREF EXT Voltage Set
Current Set
Over Voltage Trip Set
Over Current Trip Set 0-10.0
0-10.0
0-10.0
0-10.0 0-100% FS Voltage
0-100% FS Current
0-110% FS Voltage
0-110% FS Current
3.4.2 Voltage Programming
Voltage programming is very similar to resistive programming. In this case, the voltage
reference, terminal 21 of JS1, is not used and an external voltage reference is applied to the
programming inputs directly. A 10.0 V voltage source placed between terminals 3 and 1 of JS1
will produce full scale output voltage.
The current set point, over voltage trip, and over current trip can be programmed in the same
manner. Referring to the Table 3.1 for terminal identification, use terminal 22 to program the
current set point, terminal 4 to program over voltage trip, and terminal 23 to program over
current trip. The power supply has been calibrated to produce full scale output voltage and
current with 10.0 V inputs at the external reference input terminals. Furthermore, over voltage
and over current trip have been calibrated to trip at 110% full scale output voltage and current
with 10.0 V inputs at the external reference input terminals.
If the applied voltage at any input is greater than 12.50 V, the pgl (program line) LED will light
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