30
Electrical installation
Operation Manual ServoOne CM-L and ServoOne CM-A
ID no.: 1800.208B.1-00 Date: 03/2020
Electrical installation
Note:
Always comply with local and national regulations and conditions.
Note:
The minimum cross-section of the protective earth conductor must comply
with the local safety requirements for protective earth conductors for
equipment with high leakage current.
You will find a wiring example for the axis group in which you will also find detailed
information on the protective earth conductor connections in Figure 4.26.
4.5 Electrical isolation concept
The control terminals are designed as protective extra low voltage (PELV) circuits and
must only be operated with such PELV voltages, as per the relevant specification.
This aspect provides reliable protection against electric shock.
The LINE IN, LINE FILTER, SYNC and ZK connections are at mains voltage (low
voltage).
The overview shows the potential references for the individual connections in detail.
This concept also delivers higher operational safety and reliability of the supply unit.
Connections
Description
Potential
Abbre-
viation
ServoOne CM-L charging module (10)
X11/BR
Connection for external braking resistor
(connected to DC link)
Low voltage
1)
ZK
X1/
ϑ
BR
Connection for temperature monitoring
braking resistor (Klixon)
Basic isolation
2)
BI
X1/
ϑ
1
Connection for mains filter temperature
monitoring (Klixon)
Basic isolation
2)
BI
X1/
ϑ
2
Connection for mains choke temperature
monitoring (Klixon)
Basic isolation
2)
BI
X2/24 V DC
24 V control voltage input
Protective extra low voltage
circuit
3)
PELV
X3
Cross-communication
Protective extra low voltage
circuit
3)
PELV
X5
Relay contact for mains contactor
Reinforced insulation
4)
VI
X6/TP
Two test pulse outputs
Protective extra low voltage
circuit
3)
PELV
X6/RO01
Relay contact changeover contact,
programmable
Protective extra low voltage
circuit
3)
PELV
X6/PF
Power fail, signals power failure
Protective extra low voltage
circuit
3)
PELV
X6/EXP
Quick shutdown of the supply unit
BG3+4
Protective extra low voltage
circuit
3)
PELV
Table 4.5
Key to the overview "Electrical isolation concept"