Master/Slave Operation - Extech Instruments DCP36 User Manual

Master/Slave Operation

Two or more units (up to 30) can be connected in parallel to increase output current to the sum
of the connected supplies. In this mode of operation, the Master power supply will control all the
voltage and current settings of the Slave units.
Note: Please follow these steps carefully and in the correct order. Failure to do so can result in a
lockout condition. If this occurs, please power off all units, disconnect the wiring, and begin again.
1. Set all the power supplies to the same upper voltage limit (UVL) and voltage/current range.
2. Set the voltage and current output of all the slaves to maximum values.
3. Switch off all the power supplies.
4. Connect the back of the power supplies as shown in the diagram below. Note: For proper
operation all connecting cables and output cables should be of the same gauge and length.
Be sure to connect a terminator to the last Slave unit's Master jack.
5. Using either the output terminals on the front or back, connect the output cables in parallel
to the load as shown in diagram below.
6. Program the Master unit's Address ID to '0' (factory default) and set each Slave to a unique
ID between 1 and 30. See the Programming Menu section for details.
7. Switch ON the Master first and set the desired output, then switch ON the Slave units. Each
Slave unit's LED indicator should be lit if the wiring is configured correctly.
8. All output voltages and currents are now controlled by the Master unit.
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