83-507-013 Rev. A
42
•
SW1 position 2 - Down in the Master Supply and up in all Slave Supplies.
•
Connect a short between J1-8 and J1-12 in all Slave Supplies.
•
Connect J1-25 of the Master Supply to J1-10 of all Slave Supplies.
•
Connect J1-16 of the Master Supply to J1-15 of the ‘First’ Slave Supply.
•
Connect J1-16 of the ‘First’ Slave Supply to J1-15 of the ‘Second’ Slave Supply (if any)
•
Connect J1-16 of the ‘Second’ Slave Supply to J1-15 of the ‘Third’ Slave Supply (if any)
•
Connect J1-16 of the ‘Last’ Slave Supply to J1-15 of the Master Supply
•
Connect J1-12 common to all supplies
•
Select Local or Remote sense - Ref. Figures 5-4 and 5-5
2. Setting the units as Master or Slave
a) Depress and hold the FINE button for 3 seconds. The Master/Slave configuration will be displayed on
the Current Display. Rotate the CURRENT encoder to obtain the desired mode. Refer to Table 5-4 for
the CURRENT display and modes of operation.
CURRENT Display
Operating Mode
H1
Single supply (default)
H2
Master supply with 1 Slave supply
H3
Master supply with 2 Slave supplies
H4
Master supply with 3 Slave supplies
S Slave
supply
Table 5-4: Setting mode of operation
b) When the desired configuration is obtained, depress and release the FINE button or wait approx. 5
seconds.
3. Master and Slave units default operation
a) When a unit is programmed to Slave mode it enters the Remote mode with Local Lockout. In this
mode, the front panel controls are disabled to prevent accidental setting change (refer to Sec. 7.2.7 for
details).
b) The Slave units parameters will automatically set the following:
*Output voltage to approximate. 102% of rated output voltage.
*Programmed Current to zero.
*UVL to zero volts
*OVP to its maximum value
*AST On
*OUT On
*Foldback protection Off
c) The Master and Slave modes are stored in the power supply EEPROM when the AC power is turned off.
The system will return to the Master/Slave mode upon re-application of AC power.
4. CURRENT display accuracy
In the advanced parallel mode, the Master unit calculates the total current by multiplying the Master output
current by the number of Slave units. In this method, the CURRENT display accuracy is 2% +/- 1 count. In
cases that higher accuracy is required, it is recommended to use the basic parallel operation mode.
5. To release units from Slave mode
Slave units can be released using the following procedure:
a) Depress FINE button for 3 seconds. The Master/Slave configuration will be displayed on the
CURRENT display.
b) Select H1 mode using the CURRENT encoder.
c) Depress FINE button again or wait 5 seconds.
d) Turn the AC power Off to store the new setting.
e) After exiting from Slave operation the unit’s parameters will be set to:
*Programmed Voltage to zero
*Programmed Current to zero
