KEPCO KLN Series (750W, 1500W, 3000W), Main Contro Firmware Version 1.70 and higher - Manual (Page 73)

KLN Series 051614
3-27
• The alarm status function at pin 9 (ALARM) of the Control Programming port is functional for
both Master and Slave. If the Master alarm status is active, the Master and Slave will be
shut down. If the Slave alarm status is active, only the Slave will be shut down.
• When using remote control, only the Master can be operated and controlled by remote com-
mands.
To operate units connected in series, proceed as follows:
1. Verify that the units are connected as shown in Figure 2-18 (A, with local compensation or B
with remote compensation)
2. Verify that Programming Control Port connections are as shown in either Figure 2-18 (using
the optional Series Connector Board shown in Figure 2-19), or Figure 2-20 (direct connec-
tions).
3. Turn on power to Master unit first and then Slave unit.
4. 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. 3.3.37). 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.
5. 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.
6. 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 Figure 2-18.
3. If applicable, disconnect Programming Control Port connections shown in Figure 2-20.
4. After turning on each unit, set PSOP (Parallel/Series operation) to PM (Parallel Master) in
the Menu (see PAR. 3.3.37).