User Manual EM303B General Purpose Inverter 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 RUN X7 X3 X5 GND 10V VS A+ A- X1 24V EC EA PLC Figure 3-12 Control Circuit Terminal Block COM X6 X4 M0 M1 IS IF VF PE F/R X2 31