Parallel Operation (Single-Wire/Two-Wire Method) - TDK-Lambda Genesys User Manual

6.2.

Parallel Operation (Single-Wire/Two-Wire Method)

Up to four units of the SAME VOLTAGE and CURRENT RATING can be connected in
parallel to provide up to four times the Output current capability of one power supply. One
of the units operates as a Master and the remaining units are Slaves. The Slave units are
Remote Analog programmed by the Master unit.
In Remote digital operation (RS-232/RS-485, IEMD or LAN), only the Master unit is
programmed by the computer, although measurements and status can be read back from
the Slave units.
In the simplest parallel setup (Basic), the Slave unit(s) Output current merely follows that
of the Master unit. A shutoff daisy-chain may be added so when one power supply turns
On or Off (or has a fault condition) in the parallel combination, they all will.
The Advanced Parallel option is a firmware setting which adds operator convenience by
making the Master unit display the calculated sum of all unit Output currents while the
Slave units(s) Front Panel displays are disabled.
Use the "Single-Wire" method for 10kW Models where 7.5V ≤ Vout ≤ 25V.
Use the "Two-Wire" method for 10kW/15kW Models where 25V < Vout ≤ 600V.
6.2.1. Basic Parallel Operation
In this method, setting the units as Master and Slaves is made by the rear panel J1
Remote Analog connections and the setup switch SW1. Each unit displays its own
Output current and Output voltage. To program the load current, the Master unit
should be programmed to the total load current divided by the number of units in the
system. Refer to the following procedure to configure multiple power supplies for
Basic Parallel operation.
Make sure that the connection between –V terminals is reliable to avoid disconnection
during operation. Disconnection may cause damage to the power supply.
1. Setting up the Master Unit
Two-Wire Method
Set the Master unit Output Voltage to the desired voltage. Program the
Master unit Output Current to the desired load current divided by the number
of parallel units. During operation, the Master unit operates in CV mode,
regulating the load voltage at the programmed Output Voltage. Connect the
sensing circuit to local or remote sensing as shown in Fig. 6-7 or Fig. 6-8.
Single-Wire Method
Set the Master unit Output Voltage to the desired voltage. Program the
Master unit Output Current to the desired load current divided by the number
of parallel units. During operation, the Master unit operates in CV mode,
regulated the load voltage at the programmed Output Voltage. Connect the
sensing circuit to local or remote sensing as shown in Fig. 6-9 or Fig. 6-10.
NOTE
CAUTION
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83532002 Rev C