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Honeywell
• 57
5.4
Galvanic isolation barriers
The control connections are isolated from the mains potential and the GND terminals are per-
manently connected to ground. See Figure 50.
The digital inputs are galvanically isolated from the I/O ground. The relay outputs are addition-
ally double-isolated from each other at 300VAC (EN-50178).
10Vref
GND
+24V
CONTROL
GND
UNIT
AI1+
AI1-
AI2+
AI2-
DI1...
DI6
CM
AO1+
AO1-
+24Vin
RS485
RO1/1
RO1/2
RO1/3
RO2/1
RO2/2
RO2/3
TI1+
TI1-
L1
L2
POWER UNIT
L3
DC-
DC+/R+
Figure 50. Galvanic isolation barriers
U
V
W
R-
C
ONTROL UNIT
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