background image

6. Remote sensing 
 

Unavoidable voltage drops across the output terminals and the load lines can be compensated by 
including sensing leads in conjunction with the load. However it is important to make sure not to 
exceed a voltage drop of 1V or 1% from rated Voltage 1) per load line. 
 

Circuit configuration 

 
1. Jumpers bV and +S and between -V and -S (terminal TB2 on the rear panel) are opened 
 
2. The load leads (+V,-V) are linked to the output terminals of the supply and the sensing leads to the 
sensing terminals and then connected accordingly to the load. 
 
NOTE 
 
The +V, -V terminals at TB2 are not appropriate as power source ! 
 
When using the HERCULES power supply with interrupted sensing leads, the specified data can no 
longer be fulfilled. However the power supplies are internally protected so that no damage will result 
even with opened S-leads. 
 
When using long sensing leads it is recommended to use shielded cables. 
 
When proceeding with interrupted sensing leads the display will show approx. 2V or 2% from rated 
Voltage 1) less than the actual output voltage. The current display gives always the true value. 
 
 
1) whichever greater 

 
 
7. External programming 
 

The output voltage, current and OV protection can be adjusted externally with programming voltages. 
The voltage and current can also be adjusted by means of resistance programming. 

 
 
NOTE: 

Power-supplies with IEEE-488 / RS-232-interface (Opt.34) should be not programmed with external 
voltages. If such a programming is unavoidable, please disconnect the interface-card form the power-
supply. 

 
 
7.1 External voltage programming 
 

The programming voltage source is connected with its minus lead to TB4-8 and its plus lead to 
TB4-15. To activate the external mode the switch ‘‘EXTERN’’ is pushed. The yellow LED 
indicatior illuminates if the external mode is active. 
The programming voltage may have values between 0 and + 10V. The output voltage is linear 
and proportional to the programming voltage. 
The load for the auxiliary source is 150µA. 
 
NOTE 
 
1. When the programming line is interrupted during operation, the output voltage drops to zero. 
 
2. When using long programming leads it is recommended to use shielded cable in order to 
prevent external distortions. It is also recommended to apply accordingly blocking capacitors to 
the terminals in case of oscillation due to the inductivity of long programming leads. 
 
3. Ripple, stability and Tc of Hercules depends on the auxiliary source specifications. 
 

Hercules 5000 
     Page 

von 

17 

   ISSUE 

07/05 

Summary of Contents for HERCULES-2500

Page 1: ...pine Allee 1 D 94513 Sch nberg Tel 49 0 85 54 9609 0 Fax 49 0 85 54 96 09 20 Mail sales tetelectronics de INSTRUCTION MANUAL HERCULES 5000 High performance power supplies Hercules 5000 Page 1 von 17 I...

Page 2: ...voltage operation with current limiting 5 Constant current operation with voltage limiting 6 Sensing compensation 7 External programming 8 Overvoltage protection 9 Serial mode 10 Parallel mode 11 Tra...

Page 3: ...t adjustable with a 10 turn potentiometer Regulation accuracy LINE 0 01 by 10 line fluctuation LOAD 0 1 from full load to short circuit Temperature coefficient 0 01 K measured in a range of 0 50 C 1 W...

Page 4: ...ator 7 Remote enable indicator 8 LED indicator for constant voltage mode 9 LED indicator for constant current mode 10 Adjustment control for the OV protection 11 Overvoltage reset button and overvolta...

Page 5: ...AC input and TB1 three phase 5 wire 4 Terminal block for sense line and output voltage V V TB2 5 Opt 34 IEEE bus interface connector address switches and RS 232 connector 6 Regulation board with TB3...

Page 6: ...B 4 15 U PROG Setting and Function see chapter 7 2 and 7 4 TB 3 PIN LAYOUT 15 Pin Sub D connector RVP TRACKIG TB3 TB4 ON OFF ON OFF TB 3 1 SLAVE TB 3 2 MASTER TB 3 3 RCP TB 3 4 10V REF TB 3 5 TRACKING...

Page 7: ...ustomer must assure proper safety measures e g OR ing diodes fuses etc 4 Constant voltage mode with current limiting This mode of operation is reached when the LED indicator CV lights up Because of th...

Page 8: ...al programming The output voltage current and OV protection can be adjusted externally with programming voltages The voltage and current can also be adjusted by means of resistance programming NOTE Po...

Page 9: ...g mode f When the sliding switch S1 is in the bottom position the output voltage is adjusted with the voltage control knob on the frontpanel In this case Rprog has to be removed 7 3 External current p...

Page 10: ...xImax by the primary current limiting of the inverter In this case however the CC LED on the frontpanel will not illuminate 7 5 External OV programming see chap 8 too NOTE The regulation board is deli...

Page 11: ...power switch must be ON 7 8 Automatic switchover If the bus activates the IEEE interface the power supply switches automatically in EXTERN REMOTE mode The command LOCAL switches then automatically ba...

Page 12: ...The OV RESET signal can be generated using a relay contact or a logic signal Contact will be established between TB 3 7 and TB 3 14 The logic signal is high active and should have a high level between...

Page 13: ...ut voltages are adjusted via the corresponding VOLTAGE Pots The total output voltage is the sum of the two adjusted voltages When the current limit values are not equal the higher value applies as val...

Page 14: ...ot possible to ensure a simultaneously switch off of the devices in case of an over voltage decoupling diodes should be used In that case a sensing compensation is not possible see also point 8 If an...

Page 15: ...and so on 2 9 TB 4 15 of first slave to TB 3 4 of first slaves This one do for all slaves again 3 Please note 3 1 All HERCULES power supplies have to be switched on and off simultaneously 3 2 In view...

Page 16: ...R1 should be oversized eg 2W with a Tc of 20ppm C NOTE a In tracking mode the slave HERCULES is to be set in RVP mode S1 right EXTERN not pushed However a programming resistor is not connected conseq...

Page 17: ...illuminates red Simultaneously the output power is slowly diminished During this state only the MOSFET s temperature approx 85 C is regulated The LED indicators CV and CC do not light up as ARGOS unde...

Reviews: