KEPCO BOP 5-20DL, Operator'S Manual

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3-20
BOP 5-20DL 081915
FIGURE 3-23. INDEPENDENT REMOTE CONTROL OF +E
O
AND –E
O
VOLTAGE LIMIT
3.6 SERIES AND PARALLEL CONNECTION OF BOP POWER SUPPLIES.
Voltage sources, such as batteries, cells or stabilized d-c power supplies can be readily series-
connected, but normally they can not be paralleled. Even minute differences in their terminal
potential would cause large, damaging, circulating currents. By complementary reasoning, cur-
rent sources can easily be paralleled, but not series-connected. Fortunately, with practical stabi-
lized power supplies these difficulties can be overcome in various ways.
There are two basic methods which are commonly used for the series or parallel connection of
stabilized d-c power supplies. The first method is the “Automatic” series or parallel connection
by which the power supply outputs are simply connected together, in series or parallel, as
required. The individual supplies can now be adjusted to the load requirements. The “Auto-
matic” method presents no problems as long as it is confined to series connection with voltage
sources, or to parallel connection with current sources. As far as the BOP is concerned, the only
thing to remember is to place the MODE switch into its proper position:
• Auto-series connection: MODE switches of all BOP to VOLTAGE
• Auto-parallel connection: MODE switches of all BOP to CURRENT
The second method for series or parallel connection of two or more units is the “Master/Slave”
configuration, by which a designated Master supply controls the output of one or more Slave
units. This control method permits control of the common output by a single unit - the MASTER.
Since this method presents the least problems for either series or parallel connections and since
it is readily implemented with BOP power supplies, it is the recommended method for this kind
of operation and is described below.
3043889
+
22
28
C
+
10V
10V
-
+
-
+
+
-
6
32
3
+
+
-
(+)Eo LIMIT-
AMP (EXT)
(+)Eo LIMIT-
AMP (INT)
(-)Eo LIMIT-
AMP (INT)
(-)Eo LIMIT-
AMP (EXT)
(+)Eo LIMIT
CONTROL
BIAS 15V
(-)Eo LIMIT
CONTROL
COMMON
BOP Eo
LIMIT CHANNEL
PART OF REAR PROGRAMMING CONNECTOR
57.6K
57.6K
NOTES:
1. Remote sensing shown (links removed). For local sensing
disconnect leads between S terminals and load, then install
links between COM and S terminals and between OUT and
S terminals.
2. On Rear Programming Connector remove jumper between
terminals (3) and (32) and between (32) and (6).
REMOVE
SENSING LINK
REMOVE
SENSING LINK
DRIVER
SIGNAL
GROUND
S
POWER
STAGE
COM
OUT
LOAD
S
+
E o LIMIT
CONTROL
0-10V
(EXT.)
-
E o LIMIT
CONTROL
0-10V
(EXT.)
+ +
(-)Eo LIMIT-
COMP AMP
(+)Eo LIMIT-
COMP AMP
+
-
-
G
A
T
E