TDK-Lambda HFE2500 Series Instruction Manual page 18

4.5.2 MONITORING THE OUTPUT CURRENT (READ_IOUT)
The accuracy of the current reading is +/-10%
The read back output current can be calculated using the "Direct data Format".
Refer to Table 1 for the Coefficients for calculating the Output Current.
Command Used
8Ch
Example: Hex read back = 0361h;
Converted to Decimal = 865;
Using the required coefficients the output current = 865x100/1705 = 50.73A;
Read the actual Output current (Ex: 50.05A) / Accuracy is (50.05-50.73)/60(*1)x100 = -1.13%
Supply (*1)
HFE2500-12
HFE2500-24
4.5.3 MONITORING THE SUPPLY TEMPERATURE (READ_TEMPERATURE_1)
The accuracy of the Temperature reading is +/-5oC
The read back supply temperature can be calculated using the "Direct data Format".
Please refer to table 1 for the Coefficients for calculating the Supply Temperature
Command Used
8Dh
Example: Hex read back = 01DCh;
Converted to Decimal = 476;
Using the required coefficients the Supply Internal Temperature = 476*100/1023 = 46.53°C.
4.5.4 PROGRAMMING THE OUTPUT VOLTAGE (VOUT_COMMAND) (please refer to pg. 10, Fig 1.7)
The accuracy of the Output Voltage Programming is +/-2%
The output Voltage can be programmed using the "Direct data Format".
Please refer to table 1 for the Coefficients to be used for calculating the Voltage Programming.
Command Used
21h
Example: Power Supply HFE2500-24;
To program the Output Voltage to 24V, send (853x24+(-15360))/10 = 511 (DEC);
Read the actual set output Voltage (Ex: 24.05V) / Accuracy is (24.05-24)/30(*1)x100 = 0.16%
Supply (*1)
HFE2500-12
HFE2500-24
4.5.5 PROGRAMMING THE MAXIMUM ALLOWED PROGRAMMABLE OUTPUT VOLTAGE (VOUT_MAX)
The output Voltage can be programmed using the "Direct data Format".
Please refer to table 1 for the Coefficients to be used for calculating the Voltage Programming.
Command Used
24h R/W Word
Type
Read Word
Full Scale (*1)
240A
120A
Type
Read Word
Type
R/W Word
Full Scale (*1)
15V
30V
Type #Data bytes
2
#Data bytes
2
Supply (*1)
HFE2500-32
HFE2500-48
#Data bytes
2
#Data bytes
2
Supply (*1)
HFE2500-32
HFE2500-48
18
Full Scale (*1)
90A
60A
Full Scale (*1)
40V
60V