TDK-Lambda GENESYS GEN 2400W Series - Series Connection for Increased Output Voltage; Series Connection for Positive;Negative Output Voltage

83-517-000 Rev. A
48
+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.
Series Connection for Increased Output Voltage 5.14.1
In this mode, two units are connected in series so that their outputs are summed. Set the Output current limit 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 or in case one of the units
shuts down. Each diode should be rated to at least the power supply rated Output voltage and Output current.
Refer to Figures 5-1 and 5-2 for series operation with local and remote sensing.
Remote Programming in Series Operation for Increased Output Voltage:
1. Programming by External Voltage: The analog programming circuits of this power supply are
referenced to the negative output (-V) potential. Therefore, the
circuits used to control each series connected unit must be
separated and floated from each other.
2. Using the SO Function and PS_OK Signal: The Shut-Off (SO) and PS_OK circuits are referenced to the
isolated interface common, IF_COM (J1-2,3). The IF_COM
terminals of different units can be connected to obtain a single
control circuit for the power supplies connected in series.
3. Programming by External Resistor: Programming by external resistor is possible. Refer to Section
6-5 for details.
4. Programming Via the Serial The communication port is referenced to the isolated interface
Communication Port (RS-232/RS-485): common (IF_COM), which is isolated from the power supply
output potential (+V or –V). Therefore, power supplies
connected in series can be daisy-chained using the J3
Remote-In and Remote-Out connector. Refer to Chapter 7 for
details.
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
Chassis ground for models up to 60VDC Rated Output voltage and +/-600VDC
from ground for models > 60VDC Rated Output voltage. When using the RS-
232/RS-485 LAN, IEEE or USB interfaces, refer to the OUTPUT TERMINALS
GROUNDING warning in Section 3.9.11.
WARNING