Electrical Isolation Concept - Moog MSD C2 Operation Manual

moog
ID no.: CA97555-001 Date: 04/2018
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
MSD Single-Axis Servo Drive Compact Operation Manual
X4/15
I PE
ISD00
LIM
ISD01
ISD02
ISD03
ISD04
DGND
ISD05
X4/21 V
I µP
ISD06
LIM
DGND GNDµP
X4/10
I
ENPO
LIM
DGND
X4/22
I
ISDSH
LIM
X4/14 DGND
F1
ϑ
U
X4/2
H F2
ϑ
X4/13
µP
DGND X4/1
DGND
X4/7
OSD00
DGND
X4/8
OSD01
DGND
X4/9
OSD02
complexe
PE GNDµP DGND
not linear
DGND
impedance
Figure 4.14 Electrical isolation concept MSD Single-Axis Servo Drive Compact
26
Ethernet
X9
V
Resolver
µP
X6
V
Encoder
µP
GNDµP
X7
GNDµP
X5/ϑ +
Motor PTC
X5/ϑ −
X4/3
ISA00+
A/D
X4/4
ISA00-
GNDµP
X4/5
ISA01+
A/D
X4/6
ISA01-
X2/+
GNDµP
V
µP
Control
U
supply
V
24 V DC
X2/-
GNDµP
X13/2
OSD03
Motor brake
X13/1
GND
X13/3
24 V DC
GND
Supply
X13/4
U
Brake
V
X4/12
RSH
X4/11
GNDµP
X4/23
OSD04
F3
X4/24
ϑ
RC link Polyswitch
GNDµP