Note 6.5: Precaution for external connection
Port of Digital Signal Input
To control the input signal, a switch is utilized between the ports and isolated ground.
Open → Floating
Close → Grounding
Port of digital Signal output
The internal resistance of the ports is 5.1 kohm, and a pull-up power supply V
pull-up
is
required with a 5.1 kohm resistor.
Initial → > 0.9 * V
pull-up
Trigger → < 0.5 * V
pull-up
+ 1 V
If V
pull-up
is connected to “+15V_ISO” supplied by pin18 with a 5.1 kohm resistor, initial state
would be high than 13.5 V and trigger state would be lower than 8.5 V.
Analog Signal Input Port
An isolated amplifier is utilized in the ports. The voltage level is 0 to 10 V for user to enter
the command and shall not greater than 12 V.
Analog Signal output Port
An isolated amplifier is utilized in the ports. The voltage level is 0 to 10 V for users to read
out the output values of voltage, current, and power.