45
ACTIVE -
BMODE
Opened
Disable
OFF
---
Shorted
Disable
ON
---
Local/Analog Control
Pin 8 can be used to select the control mode (local or analog) of the
power supply’s output. When the input command for this pin is at high
level (or open), the control mode will be local. When input command
for this pin is at low level (or shorted to GND), the control mode will be
analog. The following table shows the various configurations:
EXTCTRL
ENABLE
EXTCTRL
VOLTAGE /
CURRENT
Local/Analog
(Pin 8)
Output
Control
Display
NOT ACTIVE
FRONT
High (Open)
Local
---
Low(Short)
Local
---
EXT-V or EXT-R
High(Open)
Local
---
Low(Short)
Local
---
ACTIVE
FRONT
High(Open)
Local
---
Low(Short)
Local
---
EXT-V or EXT-R
High(Open)
Local
---
Low(Short)
Analog
---
Local/Analog State
Pin 21 is used to indicate the current output control mode of the power
supply (local or analog state). In local state, this pin will output a high
level (5V) signal, and in analog state, this pin will output a low level (0V)
signal.