Electrical Schematics Overview Of Motor Interface - Levitronix BFS-i04 User Manual

4.1.2 Electrical Schematics Overview of Motor Interface

Bearingless fan
interface circuit
27 kW
100 kW
240 W
240 W
4...20 mA
3.3 V
Signal pins are not galvanically
isolated to motor electronics
Input
Protection
35 V / 6 A
Note 1: RS485 to USB converter cable with termination resistors to be ordered according to Table 2
PL-3507-00, Rev00, DCO# 23-128
Pin numbers, wire colors
and wire name
B3 / Blue:
Digital input
Max. pin voltage digital
input to GND = 26.4 V
B2 / Pink:
Analog input 1
B1 / Gray:
Analog input 2
Max. pin voltage analog
inputs to GND = 10 V
A1 / Yellow:
Analog output
A4 / Brown:
RS485+
B4 / White:
RS485-
A2 / Black:
Ground / Earth
A3 / Red:
24 VDC
Figure 14: Electrical schematics of motor interface
Note 2: Do not use multiple master devices on the RS485 at the same time
User Manual for BFS-i04
www.levitronix.com
Example of user
interface circuit
5..24 V
4..20 mA
4..20 mA
450 W
3.3..5 V
510 W
120 W
Control
510 W
RS485 - USB
Personal
Converter
Computer
with
(Service)
Termination
AC/DC
Supply
24 VDC
Tool
GND
15