User Manual
EM303B General Purpose Inverter
31
3.2.8
Ground Wiring
Make sure the ground terminal
grounded.
Do not share the grounding cable with welding machine or power equipment.
The size of grounding cable should meet the technical standard of electrical appliances,
and the distance to grounding point should be as short as possible.
Do not form the grounding cable as a circuit whenever two or more inverters are used
synchronously. See Figure 3-11 for the correct and incorrect grounding wirings.
Inverter
Inverter
Inverter
Inverter
Inverter
Inverter
Figure 3-11 Ground Wiring
3.2.9
Wiring Braking Resistor and Braking Unit
See Chapter 11 for details of the selection and wiring of braking resistor and braking unit.
3.3
Wiring Control Circuit Terminals
3.3.1
Control Circuit Terminals
The control circuit terminals of EM303B are located on the control PCBA:
Analog input terminals: Voltage input signals VS and VF. Current input signals IS and IF.
Numeric input terminals: X1, X2, X3, X4, X5, X6, X7, PLC
Numeric output terminals: EA, EB, EC,Y1, Y2
Analog output terminals: M0, M1
Auxiliary power supply terminals: +24V, COM, +10V, GND.
RS485 communication interface: A+
,
A-
Ground terminal: PE
See Figure 3-12 for control circuit terminal block.
Y1
EB
COM
Y2
24V
EC
EA
PLC
24V
RUN
X7
X3
X5
GND
10V
VS
A+
A-
COM
X6
X4
M0
M1
IS
IF
VF
PE
X1
F/R
X2
Figure 3-12 Control Circuit Terminal Block