67
83507013 Rev G
5.15.2.4
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.
5.15.2.5
To Release Units from Slave Mode
Slave units can be released using the following procedure:
1. Depress the FINE button for 3 seconds. The Master/Slave
configuration will be displayed on the CURRENT display.
2. Select H1 mode using the CURRENT encoder.
3. Depress the FINE button again or wait 5 seconds.
4. Turn the AC power Off to store the new setting.
a) After exiting from the
Slave operation the unit’s parameters will be set to:
Programmed Voltage to zero
AST OFF
Programmed Current to zero
OUT OFF
UVL to zero volts
Foldback protection OFF
OVP to its maximum value
Locked Front Panel
b) To unlock the front panel, depress Preview button until the display shows
“UFP”
Fig.5-4: Parallel connection with local sensing
MASTER
POWER SUPPLY
SLAVE#1
POWER SUPPLY
J1-25
J1-10
P
IPGM
+
V
-
V
+
V
-
V
LOAD
As short as possible
Twisted
pair
+S
-S
J1-8 J1-12
To J1-10
SLAVE#2
POWER SUPPLY
-S
-LS +LS
+S
+LS
-LS
NOTE
With local sensing it is important to minimize the wire length and resistance. Also the
positive and negative wire resistance should be close as possible to each other to
achieve current balance between power supplies.
CAUTION
Make sure that the connection between
–Vo terminals is reliable to avoid disconnection
during operation. Disconnection may cause damage to the power supply.
