SHENZHEN INVT ELECTRIC CO., LTD. CHV160 Operation Manual
22
Figure 4-8 Wiring of common DC bus
When two motors are at operation at the same time (such as windin motor
unreeling
motor). In this case the DC buses of the two inverters can be connected in parallel so that the
regenerated electricity can be supplied to motors at electromotion to save energy. Its detail
wiring is shown as following figure:
Wiring of Common DC Bus
4.5.6 Ground Connection (PE)
In order to ensure safety and prevent electrical shock and fire, inverter
s ground
terminals PE must be earth connected with ground resistance less than 10 . As earth wire
should be big and short, it is better to use wire with multiple copper core. When multiple
inverters need to be earth connected, it is suggested for them as many as possible not to use
common earth wire to prevent the earth wire looping in.
4.6 Control Circuit Connection
4.6.1 Precautions
Please use multiple core shielding cable or shield twisted pair (STP) to connect the control
terminals. The shielding cable should be connected with the inverter earth terminals PE if it is
applied at the inverter side. The wire arrangement should make sure that control cables are
more than 20cm far away from the main circuit and heavy current circuits (including power
supply cable, motor cable, relay and contactor connecting cable), and parallel arrangement
should be avoided. It is suggested to apply perpendicular arrangement to prevent inverter
malfunction caused by external interference.
4.6.2 Control Panel Terminals
Terminal Name
Description
S1
S5
Switching Signal Input Terminals, and together with PW and
COM forms Optical Coupling isolation input
Input Voltage Range: 9
30V
Input Impedance: 3.3K
HDI1
HDI2
High speed pulse or switching signal Input, and together with
PW and COM forms Optical Coupling isolation input
Pulse input frequency range: 0
50KHz
Input Voltage Range: 9
30V
