KEB COMBIVERT F5, Reference Manual, Page: 42 / 349

To prevent a malfunction caused by interference voltages on the control
inputs, the following steps should be observed:
• Establish a true earth ground for all ground connections!
• Do not connect drive signal commons to earth ground!
• Use a shielded cable with twisted pair wires!
• Terminate shield wires to earth ground, only at inverter!
• Separate control and power wires by 8" or more!
• Control and power wires should cross at a right angle!
3.1.4 Analog Inputs
3.1.3 Digital Input
EMC
Connect unused analog inputs to common to eliminate noise signals
!
*
*
Use of external voltage supply
Ri = 2.1 k
Ω
20...30 VDC
Regulated
Use of internal voltage supply
Speed Pattern, Torque Command

3.1.2 Connection of
the control signals
Control Connections
42