D3-DA 3xx/x
Connections and wiring
Project engineering manual V1.07
54
© KEBA
5
... Mains filters
6
... Double protective earth conductor
connection
7
... Protective earth (PE)
6.5
Electrical isolation method
The connector cables are conducted as protective extra low voltage circuit
(PELV) and may be operated only with PELV voltage according to respec-
tive specification. This provides reliable protection against electric shock.
The connector X31A - X31C are voltage potential (low voltage).
The necessary supply of 24 V for PELV circuit is provided from the 24 V DC/
GND (supply) busbars of the supply module.
The following overview shows detailed potential reference of each connec-
tor. With this concept a higher operational safety is reached.
Connections
Description
Potential
Acronym
Busbars 24 V DC
Power supply control
module
Protective extra low
voltage circuit
3)
PELV
D.c. link circuit supply
(DC-Link +/-)
Power supply d.c. link Low voltage
1)
ZK
X40A
EtherCAT IN field bus
connection
Protective extra low
voltage circuit
3)
PELV
X40B
EtherCAT OUT field
bus connection
Protective extra low
voltage circuit
3)
PELV
X25A
Digital control inputs
Protective extra low
voltage circuit
3)
PELV
X26A
Safety digital inputs
Protective extra low
voltage circuit
3)
PELV
X48A - X48D
Encoder interface
Protective extra low
voltage circuit
3)
PELV
X31A/BRK - X31C/
BRK
Connection motor
holding brake
Protective extra low
voltage circuit
3)
PELV
X31A/ϑ - X31C/ϑ
Connection motor
temperature sensor
Basic isolation
2)
ELV
X31A/UVW - X31C/
UVW
Connection motor 1 -
3
Low voltage
1)
LV
1)
Low voltage = AC: U ≤ 1000 V
2)
Simple isolation low voltage to PELV
3)
PELV (Protective Extra Low Voltage) = DVC A according to EN 61800-5-1 max. 25 V
AC or 60 V DC
