Dr.X Works G1-ISOK, Product Manual

Page: 51 / 62

4-2
４ Advanced Operation
４－３ Selecting internal control (INT)/external control (EXT)
Use the external switch to select controlling the front panel setting dial or the rear panel TB1 interface
connector.
Select to EXT, and the output voltage and the cut-off current can be set with the external voltage source
and the external volume. Simultaneously the front panel “EXT" is ON.
When the GP-IB and RS-232C control cable is attached to the rear TB1,the power supply cannot operate
alone.
Precautions in using the open collector*1
Use the open collector according to the following.
List 4-2 Open collector
Output Switch Open collector
ON Short
V
CE
Under 0.4V
(10mA)
OFF Open
V
CE
Over 2V
(Open 5V)
5V
“
L
”
= EXT
Switch 1
Switch 1 Open = INT
Switch 1 Short = EXT
＊It is possible to use open collector
instead of switch.
Ｅ
Ｃ
Fig 4-2 Selecting internal control /external control
16
17
18
19
20
4
5
6
7
TB1