Selec VFD Series

3-3-4 Earth terminal PE
For safety's sake, earth terminal PE must be well grounded to reduce noise. Please use the
standard ground lead which should be as short and thick as possible (its grounding impedance should be
no more than 10Ω). Do not connect its ground lead with that of a high-current loading machine to the
ground at the same time, for example, welder or high-power motor, they must be grounded separately.
All the converters must be connected to the same earth terminal directly if two or more converters are
installed together; please refer to the wiring layout below
(a) correct (b) not recommend (c) error
10
User Manual
3-4 Explanations of control loop terminals
AI1 AI2
GND +V
X1 X2
X3
X4 GND NC COM NO
Items
Symbol
Terminal Name
Description/ Default Setting
1 AI1
Analog Input Terminal
Terminal for Analog Input (0-20 mA)
signal
2 AI2
Analog Input Terminal
Terminal for Analog Input (0-10 V) /
POT (0-24 V) signal
5
GND Control Terminals Ground Ground for control terminals
6
X1
Multifunction Input Terminal 1
Default Setting: FWD
7
X2
Multifunction Input Terminal 2
Default Setting: REV
8 X3
Multifunction Input Terminal 3
Default Setting: FWD JOG
9
X4
Multifunction Input Terminal 4
Default Setting: Ext Fault
10
11
GND Control Terminals Ground Ground for control terminals
12
13
+V
24V supply
+24VDC / 50mA
14
NO
Multifunction Relay Output NO terminal
Default setting: Fault Output
COM
Multifunction Relay Output COM terminal
NC
Multifunction Relay Output NC terminal