83
-
5
15
-
0
00
Rev.
B
43
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
connection of two
units, however the same connection method applies for up to 4 units.
5.15.2
Advancedparall el operation
In this method, multiple supplies can be configured to parallel operation as a single powersu
p
ply. The
total load current and output volta
ge are displayed by the Master unit and can be readback from the
Master unit. The Slave units displayonly their operating status (On, Off or Fault condition).
Refer to the following procedure to configure multiple supplies for Advanced parallel operation.
1. Advancedparallel confi guration.
a) SW1 position 2
-
Down in the Master Supplyand 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 J
1 terminal 23 (IPGM
-
RTN) of the slave unit to J1 terminal 12 (COM) of ma
s-
ter unit.
The following set up connections are optional but are strongly recommended. These
set up and connections will shut down all the parallel power supplies when fault cond
i-
tion
occurs in any one of them.
Switch SW1 position 5 should be in its down position for all power supplies (See Fig.
5.6).
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 ‘Secon
d’ 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
(
See fig. 5.6).
2. Connec
tion to the Load
In parallel operation, power supplies can be connected in local or remote sensing. R
e
fer to Fig. 5
-
4 and 5
-
5 for typical connections of parallel power supplies. The figures show connection of two
units, however the same co
n
nection method a
pplies for up to 4 units.
3. 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 Slavesupply
H3
Master supply with 2 Slavesupplies
H4
Master supply with 3 Slavesupplies
S
Slave supply
Tab
le 5
-
4: Setting mode of operation
b) When the desired configuration is obtained, depress and release the FINE button or wait approx. 5
seconds.
4
. 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
unit’s
parameters will automatically set the following:
*Output voltage to approximate 102% of
rated output voltage.
*Programmed Current to zero.
*UVL to zero volts