Keba KeDrive D3-DA BG3, Operation Manual

Page: 36 / 84

4.4.2 Connection principle
5
PE
Netz/Line
1 2
6
4 3 5
7
1. Mains filter
2. KeDrive D3-DU controller
3. KeDrive D3-DP supply unit BG3
4. KeDrive D3-DC capacitance module 5. KeDrive D3-DA axis controller BG3
6. Mains choke
7. Star topology earthing (PE rail)
Figure 4.7 Protective earth conductor connection on the KeDrive D3 system
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.
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 mains, ZK (DC link) and U/V/W (Motor1/2) connections are at mains potential (low
voltage).
The overview opposite shows the potential references for the individual connections
in detail. This concept also delivers better operational safety and reliability of the axis
controllers.
Axis controller
connections (12)
Description Potential
Abbre-
viation
Busbars, 24 V DC Control section supply voltage
Protective extra low voltage
circuit
3)
PELV
Busbars, (ZK)
Supply voltage
DC link
Low voltage
1)
ZK
X40A / X40B EtherCAT IN/OUT field bus connection
Protective extra low voltage
circuit
3)
PELV
X25A / DI Digital control inputs
Protective extra low voltage
circuit
3)
PELV
X26A / Safe - DI Safe digital inputs
Protective extra low voltage
circuit
3)
PELV
X48A / X48B / X48C /
X48D
Encoder connections
Protective extra low voltage
circuit
3)
PELV
BRAKE Motor holding brake connection
Protective extra low voltage
circuit
3)
PELV
TEMP
Connection for motor temperature
sensor
Extra low voltage with
basic insulation 2)
BI
U/V/W
Connection for motor phases (motor
1/2)
Low voltage 1) ZK
- Only supply unit Reinforced insulation
4)
VI
1) Low voltage ≤ 1000 V AC or ≤ 1500 V DC
2) Single isolation from the low-voltage network: PELV networks are not allowed to be connected.
3) PELV (Protective Extra Low Voltage): U ≤ 50 V AC .
An extra low voltage connection can be earthed.
4) Safe isolation from the low-voltage network and PELV network. PELV or also a low voltage
(max. 250 V AC) is allowed to be connected.
Table 4.14 Key to the overview "Electrical isolation concept"
36
1 Electrical installation
Operation Manual KeDrive D3-DA BG3 and BG4
1804.200B.1-01 Date: 03/2023
Electrical installation