26
MSD Single-Axis Servo Drive Compact Operation Manual
ID no.: CA97555-001 Date:
04
/201
8
moog
PE
GNDµP
DGND complexe
not linear
impedance
RC link
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
ϑ
F1
ϑ
F2
X4/13
DGND X4/1
ϑ
F3
V
µP
V
µP
V
µP
V
µP
µP
X4/8
OSD01
OSD03
Motor brake
GND
X4/9
OSD02
X5/
ϑ +
X5/
ϑ −
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
Control
supply
24 V DC
24 V DC
Supply
Brake
GND
X13/3
X13/4
Figure 4.14 Electrical isolation concept MSD Single-Axis Servo Drive Compact
4.7 Electrical isolation concept
The control electronics, with their 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 p ovides 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 overview opposite shows the potential references for the individual connections in
detail.
This concept also delivers higher operational safety and reliability of the servo drive.
SELV = Safety Extra Low Voltage
PELV = Protective Extra Low Voltage
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