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5
vacon • 70
Installation
Tel. +358 (0) 201 2121 • Fax +358 (0)201 212 205
5.5
Galvanic isolation barriers
The control connections are isolated from the mains potential and the GND terminals are
permanently connected to ground. See Figure 51.
The digital inputs are galvanically isolated from the I/O ground. The relay outputs are additionally
double-isolated from each other at 300 VAC (EN-50178). See Figure 51.
Figure 51. Galvanic isolation barriers
L1 L2 L3
U V W
RO1/1
RO1/2
RO1/3
RO2/3
RO2/2
RO2/1
10Vref
GND
GND
+24V
AI1
AI2+
AI2 -
DIN1...
DIN3
CMA
DIN4...
DIN6
CMB
AO1+
AO2 -
DO1
n
k6_1 5
TI1+
TI1-
Contro l I/O
ground
Digital input
group A
Digital input
group B
Analogue
output
Digital
output
Control
board
Control
panel
Gate drivers
Power
board
11209.emf
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