TDK-Lambda HFE2500 Series Instruction Manual page 10

1.4 ON/OFF control by INHIBIT
Power Supply operation requires the "ENABLE" signal to be connected to "Signal Return".
Logic of the "INHIBIT" signal is reversed to logic of the "ENABLE" signal.
Fig-1.4
SIGNAL RETURN, INHIBIT and ENABLE controls are isolated from the output terminals and -SENSE.
1.5 OUTPUT VOLTAGE PROGRAMMING by External Potentiometer (Not applicable to supplies with PMBUS option).
Output Voltage of HFE2500 Series can be trimmed by potentiometer between approximately 80%-120% for 24V, 48V
and 80%-110% for 12V of nominal output voltage (For Output voltage limits see Graph below).
Fig-1.5
1.6. OUTPUT VOLTAGE PROGRAMMING by External Voltage.
Output Voltage of HFE2500 Series can be programmed by external voltage source between approximately 80%-120% for 24V, 48V
and 80%-110% for 12V of nominal output voltage (For Output voltage limits see Graph enclosed).
Fig-1.6
1.7 OUTPUT VOLTAGE PROGRAMMING by PMBus (optional).
Output Voltage of HFE2500 Series can be programmed by PMBus between approximately 80%-120% for 24V, 48V
and 80%-110% for 12V of nominal output voltage (for limits see HFE2500 series specifications line 3).
Fig-1.7
For section 1.5, 1.6 and 1.7, current programming pin (B11) must not be left open.
Voltage Trim m ing by potentiom eter
V OUT (V)
60
50
48
40
38.4
30
24
20
19.2
HFE2500-12
10
12
9.6
0
0 0.5
B8. Viper position
Voltage Programming
V OUT (V)
60
HFE2500-48
50
40
38.4
30
HFE2500-24
20
19.2
10
9.6
0
0 1 2
V PROG (V)
10
58
HFE2500-48
29
HFE2500-24
13.2
1
58
29
HFE2500-12
13.2
3 4 5