Ametek Sorensen Asterion DC Series, Operation Manual, Page: 146 / 157

Calibration Asterion DC Series
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3.9.2 Series Operation
Series operation is used to obtain a higher aggregate output voltage, the rated
voltage sum of the series supplies, using up to two power supplies. To connect two
power supplies in series, refer to Section 3.1.7.1 and use
a “Leader/ ollower” wiring
configuration as follows; refer to Figure 3-117. Series Connection. There are two
separate modular
connectors on the rear panel of each power supply, marked “PAR
OUT” and “PAR IN”. Also, there are two modular connectors on the rear panel of
each power supply, marked ‘CAN OUT” and “CAN IN".)
1. Programming, readback, and control is performed through the unit set as
Leader.
2. Beginning with the power supply that is to function as the Leader, use an
interface cable (890-524-01) to connect the PAR OUT connector on the
designated Leader power supply to the PAR IN connector on the second
power supply (Follower). Repeat connection between Leader CAN OUT and
Follower CAN IN also using cable 890-524-0.
3. Connect the Positive output terminal of the Leader power supply to the
positive terminal of the load.
4. Connect the Negative output terminal of the Leader power supply to the
Positive output terminal secondary unit (Follower).
5. Connect the Negative output terminal of the secondary unit (Follower) to the
negative terminal of the load.
6. Confirm that there are no shorts between the Positive and Negative output
terminals.
7. Referring to Figure 3-117, connect twisted-pair sense cables as follows;
ensure that all twisted-pair cables are as short as possible:
Both units (Leader and Follower) shall have twisted-pair cables from their
sense terminals to their own output terminals.
Note:
1.
The maximum allowable current for a series string of power supplies is the rated
output current of a single supply of the string.
2.
Remote sensing at the load should not be used during series operation. Each
power supply should have its remote sense leads connected to its own output
terminals.
3.
An anti-parallel diode (power diode capable of the maximum current of the series
group, connected across the output, but reverse biased) is recommended to
protect against sinking current into a supply should one supply be ON while
another other is OFF, as shown in Figure 3-116. Series Connection with Anti-
Parallel Diodes and Figure 3-117. Series Connection