KEPCO RCW 1500W Series - Manual (Page 11)

RCW 1500W 120607
9
mer control at its maximum clockwise position set the output voltage to the desired
maximum value by adjusting the Vadj clockwise. The value should not be more than 110%
Eo nominal.
By using an external 0-5.5V voltage source the maximum output voltage can be adjusted from 0 to
110%. For voltage source use remove the shorting link between the REF and RV terminal. Connect
the voltage source across the RV and (–)S terminals. The impedance of the load wires connecting
each power supply to the load should be the same when using remote sensing with this configura-
tion. It is possible that the overvoltage protection may be triggered if the external programming volt-
age source is changed very quickly when the power supply is at a low load condition
By adjusting the external control from minimum to maximum, the output voltage will change from
minimum to maximum value (0% to 110% of Eomax).
NOTE: Specifications are met when voltage is within adjustment range in Table 1. If remote
voltage control is not implemented, the shorting link between RV and REF must be in
place:
FIGURE 7 CONNECTIONS FOR REMOTE VOLTAGE CONTROL OF THE RCW 1500W POWER SUPPLY
3.6 REMOTE TURN-ON TURN-OFF
When power is ON at the source, the output may be turned ON or OFF with the remote control fea-
ture. The remote ON/OFF RC (Remote Control) terminals can be controlled by a logic level (2.4V
to 24V "high" and 0.0 to 0.4V "low"), or a contact closure. When the RC terminals (on the front
panel) are short circuited by using either a mechanical switch or a low level logic signal, the RCW
1500W output is cut OFF. At low level logic, the maximum sink current is 1.6mA. With the RC termi-
nals open the RCW 1500W output returns to within specifications. The RC terminals should remain
open if not used (see Figure ).
The RC terminals are isolated from the AC input and DC output terminals.
VOLTAGE CONTROL
BY TRIMMER
VOLTAGE CONTROL
BY EXTERNAL
PROGRAMMABLE SOURCE