4. OUTPUT VOLTAGEPROGRAMMING BY EXTERNAL RESISTOR
Fig 4-5 shows a typical set-up for programming the output voltage. A variable programming resistor,
0~4Kohm produces a proportional output voltage from zero to full scale. In order to set the low limit, a
series resistor can be connected to the programming resistor. For example; a 1kohm series resistor will
set the lower limit to 25% of full scale. In order to set the upper limit, a resistor can be connected in
parallel to the programming resistor. The resultant programming resistance of the series/parallel
resistors must be between 0 and 4Kohm.
NOTE
Resistive programming is possible for local and remote sensing.
Fig. 4-5:
Constant voltage resistive programming.
2
2
- LS
- LS
- S
- S
+LS
+LS
+S
+S
On/Off
On/Off
0~4K
programming resistor
0~4K
programming resistor
Optional
sets lower
limit
Optional
sets lower
limit
Optional
sets upper limit
Optional
sets upper limit
External control connector
(ZUP rear panel view)
External control connector
(ZUP rear panel view)
COM
COM
P
P
VRFV
VRFV
VCVP
VCVP
VRFI
VRFI
VCCP
VCCP
RCVP
RCVP
RCCP
RCCP
1
1
5.OUTPUT CURRENT PROGRAMMING BY EXTERNAL RESISTOR
Fig 4-6 shows the set-up for constant current resistive programming. The explanation given for
constant voltage resistive programming also applies for constant current.
Fig. 4-6:
Constant current resistive programming.
Output Good
Output Good
14
14
13
13
31