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83-507-5002 Rev. B
39
WARNING
When power supplies are connected in series, and
the load or one of the output terminals is grounded,
no point may be at a greater potential of +/-60VDC
from ground for models up to 60VDC Rated Output
and +/-600VDC from ground for models >60VDC
Rated Output. When using RS232/RS485 or IEEE,
refer to the OUTPUT TERMINALS GROUNDING
warning in Section 3.9.11.
+S
+
-
-S
-LS
+LS
POWER
SUPPLY
+S
+
+
-
-
-S
-LS
+LS
POWER
SUPPLY
LOAD
+S
+
-
-S
-LS
+LS
POWER
SUPPLY
+S
+
+
-
-
-S
-LS
+LS
POWER
SUPPLY
LOAD
Fig.5-1: Series connection, local sensing
Fig.5-2: Series connection, remote sensing
(*)
(*)
(*)
(*)
(*) Diodes are
user supplied.
8. Remote/Local: If the last setting was Local Lockout, (latched mode), the supply will return to
Remote mode (non-latched).
9. Address setting
10. Baud rate
11. Locked/Unlocked Front Panel (LFP/UFP)
(Items 8, 9, 10 are related to Remote Digital Control operation and are explained in Chapter 7)
12. Master/Slave setting.
5.14 SERIES OPERATION
Power supplies of the SAME MODEL can be connected in series to obtain increased output volt-
age. Split connection of the power supplies gives positive and negative output voltage.
5.14.1 Series connection for increased output voltage
In this mode, two units are connected so that their outputs are summed. Set the Current of each
power supply to the maximum that the load can handle without damage. It is recommended that
diodes be connected in parallel with each unit output to prevent reverse voltage during start up
sequence or in case one unit shuts down. Each diode should be rated to at least the power sup-
ply rated Output Voltage and Output Current. Refer to Fig.5-1 and 5-2 for series operation with
local and remote sensing.
CAUTION
Do not connected power supplies from different
manufacturers in series or in parallel.