Danfoss VLT AutomationDrive FC 300 Series - Galvanic Isolation in the MCB

9.3.1 Galvanic Isolation in the MCB 101
Digital/analog inputs are galvanically isolated from other
inputs/outputs on the MCB 101 and in the control card of
the frequency converter. Digital/analog outputs in the MCB
101 are galvanically isolated from other inputs/outputs on
the MCB 101, but not from these on the control card of
the frequency converter.
If the digital inputs 7, 8 or 9 are to be switched by use of
the internal 24 V power supply (terminal 9) the connection
between terminal 1 and 5 which is illustrated in
Illustration 9.11 has to be established.
130BA209.10
1
2 3
4 5
6
7
8
9 10
11
12
COM DIN DIN7 DIN8 DIN9 GND(1) DOUT3 0/24VDC DOUT4 0/24VDC AOUT2 0/4-20mA 24V GND(2) AIN3 AIN4
RIN=
5kohm
RIN=
10kohm
0-10
VDC
0-10
VDC
0V 24V
0V 24V
24V DC0V
0V24V DC
<500 ohm >600 ohm
>600 ohm
X30/
DIG IN
DIG &
ANALOG
OUT
ANALOG
IN
CPU
CAN BUS
CPU
Control card (FC 100/200/300)
General Purpose
I/O option MCB 101
PLC
(PNP)
PLC
(NPN)
Illustration 9.11 Principle Diagram
Digital input - terminal X30/1-4
Number of digital inputs 3
Terminal number X30.2, X30.3, X30.4
Logic PNP or NPN
Voltage level 0-24 V DC
Voltage level, logic'0' PNP (GND = 0 V) < 5 V DC
Voltage level, logic'1' PNP (GND = 0 V) > 10 V DC
Voltage level, logic '0' NPN (GND = 24 V) < 14 V DC
Voltage level, logic '1' NPN (GND = 24 V) > 19 V DC
Maximum voltage on input 28 V continous
Pulse frequency range 0-110 kHz
Options and Accessories
VLT
®
AutomationDrive FC 300 Design Guide, 0.25-75 kW
162 MG33BE02 - VLT
®
is a registered Danfoss trademark
99
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