KEPCO BOP 1KW-MG Operator Manual, Firmware Ver.2.01 to 2.37 - Manual (Page 98)

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BOP HIPWR 022108
NOTE: Each time the Reference Input setting is changed, the unit generates an internal *RST
reset command (see PAR. A.11) which requires the BOP output and/or protection limits
to be reprogrammed.
When the external reference is used, the BOP functions as a power amplifier, amplifying the
external reference at pin 11 to produce the output.
The nominal (inherent) voltage gain of each model is calculated by (G
NOM-V
) = E
Onom
/ E
REF
.
and nominal (inherent) current gain is (G
NOM-I
) = I
Onom
/ E
REF
. Thus the nominal gain is the
ratio between the nominal (rated) voltage or current (E
Onom
or I
Onom
), and the external refer-
ence (E
REF
) used to produce that output.
So for an external reference of ±10V, the nominal voltage gain (G
NOM-V
) = E
NOM-V
/10, e.g., the
voltage gain of a BOP 36-28MG is 36/10 = 3.6. The nominal current gain (G
NOM-I
) is I
NOM-V
/10,
e.g., the current gain of a BOP 36-28MG is 28/10 = 2.8.
The external reference voltage may be d-c, a-c, or a combination of a-c plus d-c. The maximum
frequency of an a-c signal should be below the inherent frequency response of the BOP (2KHz
for voltage, 800Hz for current (see Table 1-2). For parallel or series combinations, the frequency
response is reduced as specified in the instruction manual included with the cable kit. A fre-
quency that exceeds the bandwidth of the BOP will cause the output to be distorted.
For linear response (input vs. output) the software limit (see 3.3.4.1) should be set to nominal
and the maximum peak value (d-c plus a-c) of the reference signal must not exceed ±10V. If the
input signal exceeds the limit value (either ±10V if the software limit is set to nominal, or a lesser
TABLE 3-15. ANALOG REMOTE SETUP MENU
SETTING
CHOICES
(BOLD = Factory Default)
FUNCTION
REFERENCE INPUT
PIN 11
(referenced to pin 4)
INTERNAL
EXTERNAL
EXTL REF LVL
INTERNAL: Any external reference applied to the Analog I/O port pin 11 is
ignored and the output is controlled using either the local front panel keypad
(see PAR. 3.3.2) or remote SCPI commands (see Appendix B).
EXTERNAL: The external reference applied to Analog I/O port pin 11 is used
to control the output (see PAR. 3.4.3.1). The internal reference is ignored.
EXTL REF LVL: Allows the gain of the BOP to be established by the maximum
output voltage or current introduced in the main channel field. (see PAR.
3.4.3.2).
PROTECTION LIMIT
PINS 5, 6, 13, 14
(referenced to pin 12)
INTERNAL
EXTERNAL
LESSER LIMIT
INTERNAL - Allows the limits to be controlled by digital signals from either the
keypad (local, see PAR. 3.3.2) or SCPI command (remote, see Appendix B).
EXTERNAL: Allows the limits to be controlled by analog signals applied to the
analog port; limits set from the keypad or SCPI command have no effect (see
PAR. 3.4.4).
LESSER LIMIT: Allows protect limit to be automatically selected from either 1)
the external analog voltage applied to the Analog I/O port or 2) the value set
from the keypad or SCPI command). Whichever limit has a lower absolute
value (closest to zero) has effect .
EXTERNAL MODE
PIN 2
(referenced to pin 9)
DISABLE
ENABLE
DISABLE - Allows the main channel (voltage or current) to be selected by
either the front panel MODE key or SCPI command. The condition of pin 2 of
the Analog I/O port is ignored (see PAR. 3.3.2).
ENABLE - The front panel MODE key and SCPI commands are prevented
from affecting the active channel. Mode is determined by pin 2 of the Analog
I/O port (see PAR. 3.4.2). This function cannot be saved for power-up.
NOTE: Power-up state for Reference Input and Protection Limit are established by Power-up Settings Menu (PAR. 3.3.7) under
General Setup Menu (Figure 3-6).