Delta Electronics AC Motor Drive VFD-G - Manual (Page 35)

Chapter 2 Installation and Wiring|
2-12 Revision July 2008, EG03, SW V1.06
Terminal
Symbol
Terminal Function Factory Settings
+12V/ACM Potentiometer power source +12Vdc 20mA (Variable Resistor: 3~5KΩ)
AI1 Analog voltage/current Input
0~10V/0~1A correspond to 0~Max. operation frequency
Resolution: 10 bits
Function: Pr.04-05 ~ Pr.04-25
AI2 Analog voltage/current Input
0~10V/0~1A correspond to 0~Max. operation frequency
Resolution: 10 bits
Funciton: Pr.04-05 ~ Pr.04-25
AC1/AC2 Analog control signal common Used as common for analog inputs.
NOTE: Control signal wiring size: 18 AWG (0.75 mm
2
) with shielded wire.
Analog inputs (AI1, AI2, AC1, AC2)
„ Analog input signals are easily affected by external noise. Use shielded wiring and keep it as
short as possible (<20m) with proper grounding. If the noise is inductive, connecting the shield to
terminal AC1/AC2 can bring improvement.
„ If the analog input signals are affected by noise from the AC motor drive, please connect a
capacitor (0.1
μ
F and above) and ferrite core as indicated in the following diagrams:
C
AI1/AI2
AC1/AC2
ferrite core
wind each wires 3 times or more around the core
Digital inputs (MI1~MI4, DCM, FWD, REV, EF)
„ When using contacts or switches to control the digital inputs, please use high quality
components to avoid contact bounce.
Relay outputs (RA1, RB1, RC1)
„ Make sure to connect the digital outputs to the right polarity, see wiring diagrams.
„ When connecting a relay to the digital outputs, connect a surge absorber or fly-back diode
across the coil and check the polarity.