KEPCO BOP 5-20DL, Operator'S Manual

Page: 38 / 70

3-4
BOP 5-20DL 081915
3.2.5 EXTERNAL CURRENT MONITOR
Use signal I
O
Sensing Output at pin 10 of the Rear Programming Connector (see Figure 3-1) for
external current monitoring. This signal is not buffered. 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 op-amp generating this signal. This signal is used by the BIT card if it is
installed.
3.3 LOCAL (FRONT PANEL) OUTPUT CONTROL
3.3.1 VOLTAGE MODE OPERATION WITH CURRENT LIMITING.
The BOP may be used as a stabilized (d-c) source of positive or negative voltage with output
current limiting (for either polarity) pre-selected for the application at hand. The output must be
enabled via a positive voltage applied between pins 2 and 3 of the OUTPUT ON-OFF port (see
Table 1-7 and Figure 2-2 for details).
Figure 3-2 illustrates the voltage control circuit configured for local (front panel) control using
local sensing.
FIGURE 3-2. BOP VOLTAGE CONTROL CHANNEL (LOCAL CONTROL, LOCAL SENSING)
3043876
BOP VOLTAGE
CONTROL CHANNEL
PART OF REAR PROGRAMMING CONNECTOR
+
22
28
C
+
VOLTAGE
CONTROL
VOLTAGE
PROGRAMMING
INPUT
10V
OFF
10V
ON
10K
10K
11
9
C
7
POWER
STAGE
NOTES:
1. Set MODE Switch to VOLTAGE.
2. Set VOLTAGE CONTROL switch to ON for local (front
panel) control and OFF for remote control.
3. Local sensing shown (links installed). For remote sensing
remove links between COM, S and OUT, S and connect
corresponding S terminals to load.
COMMON
5
Eo ZERO
-
17
+
Eo COMP
AMP
ZERO
PREAMP
"A"
-
+
2.49K
DRIVER
G
A
T
E
COM
S
OUT
S
LOAD
SIGNAL
GROUND
i
R
R f