Using Intelligent Input Terminals - Hitachi L100 Series Instruction Manual

4–8

Using Intelligent Input Terminals

Using Intelligent Input Terminals

Terminals [1], [2], [3], [4], and [5] are identical, programmable inputs for general use.
The input circuits can use the inverter's internal (isolated) +24V field supply (P24) to
power the inputs. The input circuits are internally connected to the power supply ground.
As the diagram shows, you can use a switch (or jumper) to activate an input terminal that
has been configured.
If you use an external supply, its GND terminal must connect to the [L] terminal on the
inverter to complete the input circuit. Current can only flow into each input, so they are
sinking inputs, whether powered internally or externally.
NOTE: We recommend using the top row [L] logic GND for logic input circuits and the
[L] GND on the bottom row of terminals for analog I/O circuits.
Sinking inputs,
internal supply
Sinking inputs,
external supply
24V
+ – Input circuits
P24 L 5
24V
+ – Input circuits
P24 L 5
–
+
24V
L100 Inverter
4 3 2 1
L100 Inverter
4 3 2 1