KEPCO RKW 600W Series Operator Manual - Manual (Page 9)

RKW 600W 060110
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3.1 VOLTAGE ADJUSTMENT
Output voltage can be manually adjusted with the voltage adjustment control, Vadj (see Figure 4).
To adjust voltage, first place the unit under an operating load, then monitor the (+)S and (–)S
Sense terminals with a precision voltmeter and turn the voltage control to the desired operating
value. Refer to Table 1 for the recommended Adjustment Range of all the RKW 600W Models .
NOTE: Actual output voltage can exceed recommended range values.
3.2 REMOTE VOLTAGE CONTROL
The unit is shipped with a shorting link in place between RV and REF terminals. Removal of this
link allows the output voltage to be adjusted by either a trimmer pot (resistance) or by an external
variable voltage source using the RV terminal.
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.
Use either local sensing (PAR. 5.1) or remote sensing (PAR. 5.2). If remote sensing is used, the
impedance of the load wires connecting each power supply to the load should be the same. It is
possible that the overvoltage protection may be triggered if the external programming voltage
source is changed very quickly (using either the Vadj pot or the RV terminal) when the power supply
is at a low load condition.
RESISTANCE. Use a shielded wire, 2m maximum in length, for connection to the trimmer control.
Connect the external trimmer as shown in Figure 5 (A). Suggested value for the trimmer control is
5K ohms). With the external trimmer control at its maximum clockwise position, set the output volt-
age to the desired maximum value by adjusting Vadj clockwise. The value should not be more
than 120% of Eo nominal (not more than 110% for the 48-volt model, not more than 3.6V for the
3.3-volt model).
VOLTAGE. By adjusting an external 0-6V voltage source (0-5.5V for the 48-volt model) from mini-
mum to maximum, the maximum output voltage can be adjusted from 0 to 120% (the 48-volt model
can be adjusted from 0 to 110%; the 3.3-volt model can be adjusted to 3.6V). Remove the shorting
link between the REF and RV terminals. Connect the voltage source across the RV and (–)S termi-
nals as shown in Figure 5 (B).
FIGURE 5. CONNECTIONS FOR REMOTE VOLTAGE CONTROL
3.3 REMOTE TURN ON-TURN OFF
When input source power is ON, the output may be turned ON or OFF with the remote control fea-
ture using the ±RC terminals (see Figure 4). These terminals accept a logic level (2.4V to 24V
"high" and 0.0 to 0.4V "low"), or a contact closure. When the ±RC terminals are open, using either