ABB ACS580-01 Hardware Manual page 155

Isolation areas, R0...R4 (CCU-11):
Symbol Description
Reinforced insulation (IEC/EN 61800-5-1:2007)
Functional insulation (IEC/EN 61800-5-1:2007)
Below altitudes 2000 m (6562 ft): The terminals on the control board fulfil
the Protective Extra Low Voltage (PELV) requirements (EN 50178):
There is adequate insulation between the user terminals which only
accept ELV voltages and terminals that accept higher voltages (relay
outputs).
Between altitudes 2000 m (6562 ft) ... 4000 m (13123 ft): If you connect
higher than ELV voltage to one relay output, no relay output meets the
Protective Extra Low Voltage (PELV) requirements (EN 50178), because
there is only functional insulation between the individual relay outputs.
X1
AI/AO
X2
24 V
GND
X3
DI
SLOT1
FBA
X4
STO
SLOT3
EFB
SLOT2
I/O extension
Panel port
X8
RO
X7
RO
X6
RO
Technical data 155
Power unit
connection