20
1003370 05/2016 V01
3.6 Electrical isolation method
The control electronics, with its logic (μP), the encoder terminals and the inputs and outputs, are electrically isolated
from the power section (power supply/DC-link). All control terminals are designed as safety extra-low voltage/
protective extra-low voltage (SELV/PELV) circuits and must only be operated with such SELV/PELV voltages, as per
the relevant specification. This provides reliable protection against electric shock on the control side.
A separate control supply, compliant with the requirements of a SELV/PELV, is therefore needed. The opposite over-
view shows the potential supplies for the individual terminals in detail. This concept also delivers higher operational
safety and reliability of the drive controller.
SELV = Safety Extra Low Voltage
PELV = Protective Extra Low Voltage
Illustration 20.1 Electrical isolation method YukonDrive®
PE
GNDµP
DGND Complex
non-linear
impedance
RC
element
Polyswitch
GNDµP
GNDµP
GNDµP
X4/15
ISD00
ISD01
I
LIM
X4/21
ISD06
I
LIM
X4/10
ENPO
I
LIM
X4/22
ISDSH
I
LIM
X4/7
OSD00
X4/3
ISA00+
Motor-PTC
X4/4
ISA00-
ISD02
ISD03
ISD04
ISD05
A/D
A/D
ISA01+
X4/5
X4/6
ISA01-
X4/14
GNDµP
GNDµP
GNDµP
GNDµP
GNDµP
DGND
DGND
DGND
DGND
DGND
DGND
DGND
DGND
X4/2
F1
F2
X4/13
DGND X4/1
F3
V
µP
V
µP
V
µP
V
µP
µP
X4/8
OSD01
OSD03
Motor brake
GND
X4/9
OSD02
54
32
1
98
76
5432
1
10
987
6
15
14
13
12
11
X5/
+
X5/
−
RSH
X13/2
X13/1
X4/12
X4/11
OSD04
X4/23
X4/24
Ethernet
X9
Resolver
X6
Encoder
X7
PE
U
V
U
V
X2/+
X2/-
U
H
24V DC
control
supply
24 V DC
supply
for brake
GND
X13/3
X13/4