Electrical Isolation Concept - Jetter JetMove 3000 User Manual

JetMove 3000 Supply Unit
3.5

Electrical isolation concept

All control connections are designed as a safety extra-low voltage circuits (PELV) and must only be
operated with such PELV voltages according to the respective specification. This means a reliable
protection from electric shock on the control side.
The connections X1, X5, X7, X8 are at mains potential (low voltage).
The following overview details the potential references of the individual connections.
This concept also gains higher operating reliability for the servo amplifier.
Supply unit
connections (11)
X1/BR
X1/ϑ
X2/24 V DC
X3
X5
X6/TP
X6/RO01
X7
X8
Busbar 24 V
Busbar DC Link
1) Low voltage = AC: U ≤ 1000 V
2) Simple isolation from low-voltage and PELV network
3) PELV (Protective Extra Low Voltage) = protective low voltage AC: U ≤ 50 V
One connection of the extra low voltage is grounded.
4) Secure isolation from low-voltage and PELV network
Table 3.3 Key to "Electrical isolation concept" overview
38
Description
Connection of external brake resistor
(connected to DC link)
Connection of temperature monitoring
of brake resistor (Klixon)
Output 24 V switch-mode power sup-
ply unit
Cross communication
Relay contact, programmable
Two test pulse outputs
Contact of changeover relay, pro-
grammable
Mains supply DC link
Mains supply switch-mode power
supply unit
Output 24 V switch-mode power sup-
ply unit
DC link
Installation
Potential
Low voltage
1)
Basic insulation
2)
Protective extra-low voltage
circuit
3)
Protective extra-low voltage
circuit
3)
Reinforced insulation
4)
Protective extra-low voltage
circuit
3)
Protective extra-low voltage
circuit
3)
Low voltage
1)
Low voltage
1)
Protective extra-low voltage
circuit
3)
Low voltage
1)
Abbrevia-
tion
ZK
BI
PELV
PELV
VI
PELV
PELV
Mains
Network
PELV
ZK
Jetter AG