KEPCO BOP-GL 1KW, Operator'S Manual

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BOP-1K-GL 111315
pletely depleted. The BOP will even try to reverse-charge the battery to the negative voltage
limit value. Therefore, if current mode is chosen, it is recommended that independent limits be
used, and the negative voltage limit be set to minimum (0.2% of rated output voltage).
If the positive voltage-limit is set lower than the battery's voltage, then more than one loop will
try to control the output. Consequently, the battery will discharge at a much higher current than
the BOP current setpoint. As previously described, if not monitored and the process stopped,
the discharge will completely deplete the battery.
If current mode is needed, Kepco can modify the unit to establish the voltage limit feedback loop
to use the Sense terminals, rather than the Monitor terminals. The modified unit behaves similar
to that described for voltage mode except that voltage accuracy is 12-bit/ 0.3%, versus 14-bit/
0.1% for voltage mode. Contact Kepco Sales for further details.
3.3.7 EXTERNAL LIMITS
These limits are external analog signals which are converted within the BOP to digital signals
that program the protection channels only: current protect in voltage mode and voltage protect
in current mode. The range of each analog input signal is +1V to +10V, corresponding to a
range for clamping the output between minimum, 10% of nominal (positive and negative), to
+max/–min of nominal rating. Refer to PAR. 3.4.2 for details on implementing external limits.
Table 3-2 explains the effect that these limits have in both voltage and current mode, and refer-
ences the corresponding paragraph for changing the parameter.
3.3.8 ENABLING/DISABLING DC OUTPUT POWER
The behavior of the unit when disabled depends on the Load Type setting (see PAR. 3.5.5 and
Table 3-3 for details). There are four ways to disable the output:
1. Using Remote Shutdown pin 2 (referenced to pin 1) of the Protect Ext. port. This requires
the unit to be turned off, then on in order to restore operation (see PAR. 3.3.8.1).
2. Using Remote On-Off at pin 2 (referenced to pin 1) of the Trigger port which sets the output
to off (disabled) or on (enabled) by toggling a signal applied to the Trigger port (see PAR.
3.3.8.2)
3. Using Remote On-Off at pin 2 (referenced to pin 1) of the Trigger port to disable the output
and the digital command OUTP ON to enable the output (see PAR. 3.3.8.3).
4. Using digital commands OUTP OFF and OUTP ON to disable and enable the output (see
PAR. 3.3.8.4).
3.3.8.1 REMOTE SHUTDOWN
Functionality of a standalone unit can be shut down using a remote signal applied to the PRO-
TECT EXT. PORT as shown in Figure 3-2 or 3-3. Functionality of a multiple unit configuration
(parallel, series or series-parallel) can be shut down by applying a remote signal to the master
PAR/SER PROTECTION PORT as shown in Figure 3-2 or 3-4. When the signal is momentarily
active (minimum 100 microseconds), power transfer between input and output is stopped (both
input and output internal modules are shut off). This condition is latched and shuts down unit
functionality. The unit remains powered, but no output is available and the front panel
POWER/FAULTLIMIT LED will turn red (fault). The unit must be powered off, then on again to