KEPCO BOP 5-20DL, Operator'S Manual

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3-16
BOP 5-20DL 081915
3.5.1 REMOTE CURRENT CONTROL USING RESISTANCE (POTENTIOMETER)
Similar to the local (front panel) control mode described in PAR. 3.3.3, the BOP output current
can be controlled over the full output range by means of and external resistance in place of the
front panel CURRENT CONTROL as shown in Figure 3-15. The control potential (zero to
(±)10V) is applied via Preamp “B,” operating with unity gain, to the l
O
Comp. Amp which drives
the Power Stage with a fixed gain as listed in Table 1-2. A d-c control signal from zero to (±)10V
will, therefore, control the BOP output current through its specified range.
FIGURE 3-15. REMOTE POTENTIOMETER CONTROL OF THE BOP OUTPUT CURRENT
3.5.2 REMOTE CURRENT CONTROL USING RESISTANCE (DECADE BOX)
See Figure 3-16 for remote current control using a two-terminal resistance (decade box)
FIGURE 3-16. REMOTE D-C OUTPUT CURRENT CONTROL USING TWO-TERMINAL
RESISTANCE (DECADE)
BOP CURRENT
CONTROL CHANNEL
PART OF REAR PROGRAMMING CONNECTOR
22
C
+
+
28
CURRENT
CONTROL
CURRENT
PROGRAMMING
INPUT
OFF
10V
10V
ON
10K
10K
13
15
4
NOTES:
1. Set MODE Switch to CURRENT and CURRENT
CONTROL switch to OFF.
2. Local sensing shown. Remote sensing not
recommended for Current control.
3. For inductive loads in excess of 0.5mH, the BOP
output response may be optimized by placing a
capacitor across terminals (16) and (18) of the
Rear Programming Connector (
I
o COMP AMP).
I
o ZERO
POWER
STAGE
COMMON
ZERO
+
10K
PREAMP
"B"
-
2
19
I
o COMP
AMP
+
-
DRIVER
R
G
A
T
E
S
C
16 18
LOAD
3043698
COM
S
OUT
S
SIGNAL
GROUND
Ri
10K
(EXT.)
(EXT.)
REMOTE
VOLTAGE
CONTROL
20K
f
R
BOP CURRENT
CONTROL CHANNEL
PART OF REAR PROGRAMMING CONNECTOR
22
C
+
+
28
CURRENT
CONTROL
CURRENT
PROGRAMMING
INPUT
OFF
10V
10V
ON
10K
10K
13
15
4
NOTES:
1. Set MODE Switch to CURRENT and CURRENT
CONTROL switch to OFF.
2. Local sensing shown. Remote sensing not
recommended for Current control.
3. For inductive loads in excess of 0.5mH, the BOP
output response may be optimized by placing a
capacitor across terminals 16 and 18 of the rear
programming connector (
I
o COMP AMP).
I
o ZERO
POWER
STAGE
COMMON
ZERO
+
10K
PREAMP
"B"
-
2
19
I
o COMP
AMP
+
-
DRIVER
R
G
A
T
E
S
C
16 18
LOAD
3043700
COM
S
OUT
S
SIGNAL
GROUND
REMOTE VOLTAGE
CONTROL Rf (EXT.)
0 - 10K
S1
POLARITY
SELECTOR
(EXT.)
Ri
10K
(EXT.)