KEPCO KLR Series User Manual - Manual (Page 77)

KLR091313
3-37
With the power supply configured as shown in Figure 3-14 and assuming the load causes the
power supply to operate in voltage mode, varying external resistor R2 from 0 to 10K causes the
output voltage of the power supply to vary linearly from 0 to full scale, while R1 can be used to
adjust the current limit. When the power supply operates in current mode, R2 will adjust the volt-
age limit and R1 will adjust output current.
Factory default full scale (F.S.) resistance programming is 10K ohms based on F.S. program-
ming voltage of 10V. To set full scale resistance to a lower value, see PAR. 3.2.17.4 to change
the F.S. programming voltage to a lower value, then adjust based on 1000 ohms/Volt.
3.4.2 PROGRAMMING WITH EXTERNAL VOLTAGE
Figure 3-15 is a simplified diagrams of the KLR showing the switch configuration and external
connections required for analog programming using an external voltage.
1. Limit Model (PAR. 3.2.9) and Overvoltage and Overcurrent settings (PAR. 3.4.3) must be
established via either local programming or digital remote programming prior to initiating
Analog Remote programming.
2. Turn off power and configure the Analog I/O DIP switch (Figure 2-2) as follows:
SW1: OFF (Program output voltage via voltage)
SW2: OFF (Program output current via voltage)
SW3: either OFF or ON (disabled when in remote analog programming mode; see
Table 2-2)
SW4: Reserved - Do not use
SW5: Either OFF (Local controls enabled) or ON (Local controls locked)
3. Configure Analog I/O Port J2 (Figure 2-2) by referring to Table 2-7 and Figure 3-15 (ground-
ing J1 pin 12 enables analog programming).
4. Turn the unit on and wait until aRem appears in the status display before using V1 and/or V2
(Figure 3-15) to programming the power supply output.
Assuming the load causes the power supply to operate in voltage mode, varying source voltage
V2 from 0 to maximum causes the output voltage of the power supply to vary linearly from 0 to
full scale, while V1 can be used to adjust the current limit. When the power supply operates in
current mode, V2 will adjust the voltage limit and V1 will adjust output current.
Factory default full scale (F.S.) voltage programming is 10V. To set full scale voltage program-
ming to a lower value, see PAR. 3.2.17.4.