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83
-
507
-
013 Rev. D
42
6.
Connection to the load
In parallel operation, power
supplies can be connected in local or remote sensing. Refer to Fig. 5
-
4 and 5
-
5 for typical connections of parallel power supplies. The figures show the connection of
two units, however the same connection method applies for up to 4 units.
5.15.2
Advanced parall
el operation
In this method, multiple supplies can be configured to parallel operation as a single power supply. The
total load current and output voltage are displayed by the Master unit and can be readback from the
Master unit. The Slave units display o
nly their o
p
erating status (On, Off or Fault condition).
Refer to the following procedure to configure multiple supplies for advanced parallel operation.
1. Advanced parallel configuration
SW1 position 2
-
Down in the Master Supply and up in all Slave Supp
lies.
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.
The following set
-
up connections are optional but are strongly recommended. These se
t-
tings and connections will shut down
all the parallel power supplies when a fault condition
occurs in any one of them:
Switch SW1 position 5 should be in its down position for all power supplies (See Se
c-
tion 5.6)
Connect J1
-
16 of the Master Supply to J1
-
15 of the ‘First’ Slave Supply.
Connec
t J1
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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
-
2
(or J1
-
3) 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 di
s
played
on the Current Display. Ro
tate 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 s
et 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