Parallel And Series Operation; Parallel Operation - Ametek SPS A Series Operation Manual

Operation

PARALLEL AND SERIES OPERATION

3.10
The following modes of operation are used for applications requiring more
current or voltage than is available from a single power supply. To meet
the requirements for greater output voltage or current, two supplies may
be connected in series or up to five connected in parallel.
3.10.1

PARALLEL OPERATION

In order to connect up to five power supplies in parallel, use a
"Master/Slave" daisy-chain wiring configuration as follows (refer to Figure
3-20):
(Note that there are two separate 9-pin connectors on the upper left rear
panel of each power supply, marked "PAR OUT" and "PAR IN").
1. Beginning with the power supply designated (by you) as the Master
power supply, use an interface cable (P/N 890-453-03) to connect the
PAR OUT connector on the designated Master power supply to the
PAR IN connector on the second power supply (Slave 1).
2. On the second power supply (Slave 1), use another interface cable to
connect the PAR OUT connector to the third power supply's (Slave 2)
PAR IN connector. Continue these interconnections up to a maximum
of 5 power supplies.
3. Connect the Positive output terminals of all the power supplies and
the Load.
4. Connect the Negative output terminals of all the power supplies and
the load.
5. Confirm that there are no shorts between the Positive and Negative
output terminals.
6. Referring to Figure 3-20, connect twisted pair cables as follows:
All slave units shall have twisted pairs from their SENSE terminals to
their output terminals, as appropriate.
For Remote Sense, the master unit shall have a twisted pair from its
own SENSE terminals to the Load's output terminals.
For Local Sense, the master unit shall have a twisted pair from its
own SENSE terminals to its own output terminals.
Ensure that all twisted pair cables are as short as possible.
3-26
AMREL SPS-A Series
M550129-01 Rev A