ANALOG CONTROL 
151 
Connection- alt. 
shielding 
If the wire shield needs to be grounded at the 
current source (EXT-I), then it can be connected as 
shown below. 
PSUEXT-I
Isolated 
Current 
Option
4
2
Output 
Terminal
2 core shielded 
wire or twisted 
pair
 
  Pin4(GND_ISO) → EXT-I (-) 
  Pin2(+VPROG_ISO) → EXT-I (+) 
  EXT-I ground (GND) → Wire shield 
1.  Connect the external current source according 
to the connection diagrams above. 
2.  Set the F-90 power on 
configuration setting to 4 (Control 
by Isolated Board). 
3.  Set the F-96 power on configuration setting to 1. 
4.  Set the F-97 power on configuration setting to 1. 
  Be sure to cycle the power after the power on 
configuration has been set.  
5.  Press the Function key and confirm 
the new configuration settings  
(F-90=4, F-96=1, F-97=1). 
6.  Press the Output key. The 
voltage can now be 
controlled with the isolated 
external current control.