
Control terminals description
Digital inputs
Terminal
Signal function
Description
Signal requirement
X1...X4
Multi-function
digital inputs
See Group E1
Inputs via opto-electric couplers:
24 VDC, 8 mA / 12 VDC, 4 mA
SC
Shared connection
Shared connection for isola-
tion opto-electric couplers
ONLY positive of power supply
can be connected
+24 V
Power supply for
digital inputs
COM is reference
Isolated from GND
50 mA, +15%...-10%
COM
Analog inputs
Terminal
Signal function
Description
Signal requirement
+10 V
Power supply for
analog inputs
GND is reference
Max. output current: 30 mA
AI
Analog voltage input /
Analog current input
Analog voltage / current in-
puts are used as external fre-
quency setting channels
To switch between voltage
and current or to set the input
related functions, see Group
E1
Voltage input range: 0 / 2...10 V
Input impedance: 40 kΩ
Resolution: 1/1,000
Current input range: 0 / 4...20
mA
Input impedance: 500 Ω
Resolution: 1/1,000
GND
Shared connection
Isolated from COM
–
Shielding connection
Connected with grounding
terminals on heatsink inter-
nally
–
VFC 3210
Bosch Rexroth AG
Frequency Converter Wiring
DOK-RCON04-VFC3210****-IT01-EN-P
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