3-40
BOP HIPWR 111315
3.4.2
VOLTAGE/CURRENT MODE CONTROL
The mode of operation, voltage or current, can be programmed externally by applying a signal
at pin 2, referenced to pin 9, of the Analog I/O port. Applying a TTL logic 1 (or open circuit) pro-
grams the unit to voltage mode. Applying a TTL logic 0 (or short) programs the unit to current
mode.
To be functional this feature must first be configured from the front panel. From the power-up
screen press
$
to enter the Analog Remote Setup menu (see Table 3-15). Highlight External
Mode, then press
!
, highlight Enable and press
$
. Press
%
to apply the changes (without
saving for power-up) and exit to the power-up screen or
#
to abort. The Save/Recall feature
(PAR. 3.3.8) can also be used to restore this setting upon power-up.
3.4.3
CONTROLLING THE OUTPUT USING THE BOP AS A POWER AMPLIFIER
The BOP can function as a power amplifier by means of the External Reference input at the
Analog I/O port. This analog signal controls the main channel of the BOP. To use the BOP as a
power amplifier see the following instructions for using the external reference: PAR. 3.4.3.1 for
fixed gain, PAR. 3.4.3.2 for variable gain by establishing the maximum full scale output.
3.4.3.1
FIXED GAIN USING EXTERNAL REFERENCE CONTROL
The main channel of the BOP, voltage in voltage mode, and current in current mode, can be
controlled by an external reference voltage, 0 to ±10V applied at pin 11, referenced to pin 10, of
the Analog I/O port. The input impedance for this signal is 20K ohms. This feature is enabled as
follows:
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).
Содержание BOP-MG 1KW
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Страница 20: ...x BOP 1K 111315 FIGURE 1 1 HIGH POWER BOP SERIES POWER SUPPLY...
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Страница 56: ...2 16 BOP HIPWR 111315 FIGURE 2 5 PARALLEL CONFIGURATION LOCAL SENSING TYPICAL...
Страница 57: ...BOP HIPWR 111315 2 17 FIGURE 2 6 PARALLEL CONFIGURATION REMOTE SENSING TYPICAL...
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