GW Instek PSU 300-5 - Isolated External Current Control of Voltage Output

PSU Series User Manual
150
Isolated External Current Control of Voltage Output
Background
Current control of the voltage output uses the
isolated current option (PSU-ISO-I). A current of
4~20mA is used to control the full scale voltage of
the instrument, where:
Output voltage = full scale voltage × ((external
current-4mA)/16mA)
Connection
When connecting the external current source to the
isolated analog option, use shielded or twisted
paired wiring.
PSUEXT-I
Isolated
Current
Option
4
2
Output
Terminal
2 core shielded
wire or twisted
pair
1or8
 Pin4(GND_ISO) → EXT-I (-)
 Pin2(+VPROG_ISO) → EXT-I (+)
 Pin 1 or 8 (Shield) → Wire shield