KEPCO KLN 750W Series, Firmware Version 1.60 to 1.6x - Manual (Page 57)

KLN 750W 032614
3-21
To operate units connected in series, proceed as follows:
1. Verify that the units are connected as shown in either Figure 2-10 (without remote compen-
sation) or Figure 2-11 (with remote compensation)
2. Turn on power to Master unit first and then Slave unit.
3. Set PSOP (Parallel/Series operation) function in the menu to SM (Series Master) for the
Master unit and to SS (Series Slave) for the Slave unit (see PAR. 3.3.24). After setting
PSOP, output ON/OFF of the series combination is controlled by the Master.
CAUTION: TO ENSURE THE PROTECTION FUNCTIONS WORK PROPERLY, SET
OVP/OCP VALUES HIGHER FOR THE SLAVE UNIT.
4. Set OVP and OVC of the Slave to a higher value than that for the Master to ensure that
overvoltage and overcurrent protection work properly.
5. When powering off a series combination, first turn off the Slave, then the Master.
3.4.2 DISCONTINUING SERIES OPERATION
To allow units connected in series to function independently, proceed as follows:
1. Turn off power to Slave, then Master.
2. Disconnect all series connections shown in either Figure 2-10 (without remote compensa-
tion) or Figure 2-11 (with remote compensation), including SER IN connections.
3. After turning on each unit, set PSOP (Parallel/Series operation) to PM (Parallel Master) in
the Menu (see PAR. 3.3.24).
3.4.3 PARALLEL OPERATION
• The front panel current displays of the Master and Slave(s) each show the output current of
the individual units. The front panel voltage display of the Master shows the output voltage
for the parallel combination
• The voltage monitoring function at pin 20 (V MON) of the Control Programming port is func-
tional for the Master and all Slaves, 0 - 10V corresponding to 0 to full scale voltage of each
individual unit.
• The current monitoring function at pin 22 (A MON) of the Control Programming port is func-
tional for Master and all Slaves, 0 - 10V corresponding to 0 to full scale current of the indi-
vidual units. Current monitor for the parallel combination is the sum of the output of pin 22 of
the Master, plus pin 22 of all Slaves.
• The alarm status function at pin 9 (ALARM) of the Control Programming port is functional for
Master and all Slaves. If the Master alarm status is active, the Master and all Slaves will be
shut down. If a Slave alarm status is active, only that Slave will be shut down.
• Remote sensing for Slave units is disabled when operating in parallel configurations.
• When using remote digital control, only the MASTER can be operated and controlled by
remote commands.