Mitsubishi Electric FATEC FR-A800 Manual page 133

7
REVIEW OF INSTALLATION ENVIRONMENT
3) How to connect the frequency setting potentiometer correctly
Each terminal of the frequency setting potentiometer has a terminal symbol. Incorrect
connection causes an inverter failure.
The resistance is also important for selection.
<Specification> 2 W 1 kΩ Wire-wound variable resistor type B characteristic
(b) Connection to output terminals
1) Open collector output terminal
2) Pulse train output terminal
FM
SD
(Common)
7.3 Problems and measures when using inverter
128
Type C characteristics
Type B characteristics
Type A characteristics
Rotation angle
Fig. 7.38 Connection of the frequency setting potentiometer
Relay
RUN
SE
Permissible current
is 0.1 A.
Calibration
Pulse train
resistor
R
10k Ω 1/2W
For the pulse train output, voltage
(average) proportional to the output
frequency is output. Therefore, the output
status can be measured by the tester
(10 VDC range).
Tester
Fig. 7.39 Connection of output signal terminals
1
2
Using flywheel diodes or capacitors is
recommended as a countermeasure against noise.
Be careful of the polarity!
Prepare DC power supply of ripple
voltage 10% or lower.
Be careful not to connect opposite
R
polarity.
A
24 VDC
Frequency meter
1m A
3
<Correct connection>
3) Analog voltage output (0 to 10
VDC)
10 V voltmeter
AM
5
Shielded cable
10
2
Inverter
5