Analog Input; Using The External Volume (Vr); Inputting The Voltage; Inputting The Current - Omron 3G3JX User Manual

4-2 Function Mode

Analog Input

Two types of external analog inputs are available for frequency reference.
For voltage input, you can set a frequency from 0 to maximum by applying a voltage from 0 to 10 V
between inputs FV and FC. For current input, apply 4 to 20 mA between inputs FI and FC. Note that
voltage and current cannot be input simultaneously. Also, do not connect the signal lines for inputs
FV and FI simultaneously.
Reference voltage (10 V)
Voltage input
Current input
4
Analog ground
A005 set value
AT terminal input status
Analog input enabled

Using the External Volume (VR)

This is the general method that can be easily achieved.
Connect a variable resistor between terminal FS, a 10-V
power supply inside the Inverter, and ground FC, and
then connect its output to terminal FV. You can set the
frequency by adjusting VR.
The external VR should be that of 1 to 2 kΩ, 2W.

Inputting the Voltage

Input the voltage between terminals FV and FC.
Input impedance is approx.10 kΩ.
Do not input negative voltage. Doing so may result in
damage to the Inverter.

Inputting the Current

Input the current between terminals FI and FC.
Input impedance is approx. 250 Ω.
For the external analog input indicated above, use a
shielded wire for connection and connect the shielded
part to FC for stable operation.
4-73
FS FV FI FC
02
OFF ON OFF
FI-FC Volume FI-FC
A001
[AT]
Inverter VR
FS FV FI FC
03 04
ON OFF ON
Volume FV-FC
FS
External VR: 1 to 2 kΩ, 2 W
FS FV
FS
Frequency setting
05
OFF ON
FI-FC
FV FI FC
FI FC
+ -
0 to 9.6 V DC
0 to 10 V DC standard
FV FI FC
4 to 19.6 mA
4 to 20 mA standard