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KEPCO
THE POWER SUPPLIER™
LOAD REACTANCE, PARAGRAPH 1-10D, add the following:
There are two additional means of stabilizing the current loop operating with inductive loads:
1. Add capacitance in parallel with the output (inductive load). The value of capacitor can be
from 0.1 uF to 1.0 uF depending on the value of the load inductance.
2. Add a series-connected resistor capacitor network in parallel with the output (inductive load).
The value of resistor should be in the range of 100 to 500 Ohms and the value of capacitor
should be 0.1 uF to 0.5 uF, depending on the load inductance value.
The second option is recommended when the BOP is used only for DC operation or very low
frequency output modulation into inductive loads.
AFTER PAR. 3-3J) EXTERNAL LEADS add the following:
K) EXTERNAL VOLTAGE MONITOR. Use signal Eo Monitor Output at pin 20 of the PC12 pro-
gramming connector (see Figure 4-5) for external voltage monitoring. Caution should be exer-
cised in handling this signal: use a series 5K resistor in combination with a high impedance
monitoring device, or an external high impedance buffer between the BOP and the monitoring
device. This signal is buffered by OPAMP IC23 (see Figure 6-4) which functions as a repeater
for the signal coming from the RN3 matched pair divider connected at the output. There is no
overvoltage protection. This stage is protected against short-circuit by the intrinsic protection of
the OPAMP generating this signal. This signal is used by the BIT card if it is installed.
L) EXTERNAL CURRENT MONITOR. Use signal Io Sensing Output at pin 10 of the PC12 pro-
gramming connector (see Figure 4-5) for external current monitoring. This signal is not buff-
ered. Use a series 5K resistor in combination with a high impedance monitoring device, or an
external high impedance buffer between the BOP and the monitoring device. CAUTION: An
accidental short-circuit at this terminal while the unit is in Current mode or Current limit
mode will damage the BOP power stage. There is no overvoltage protection. This stage is
protected against short-circuit by the intrinsic protection of the OPAMP generating this signal.
This signal is used by the BIT card if it is installed.
BOP/042307
KEPCO, INC. ! 131-38 SANFORD AVENUE ! FLUSHING, NY. 11355 U.S.A. ! TEL (718) 461-7000 ! FAX (718) 767-1102
INSTRUCTION MANUAL CORRECTION
KEPCO MODELS:
®
BOP 100W, BOP 200W, BOP 400W
email: hq@kepcopower.com ! World Wide Web: http://www.kepcopower.com
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