Siemens SINUMERIK 810D Configuration Manual page 32

2 Installation Conditions
2.1 Secondary electrical conditions
.
3 x 400VAC
MP
Housing/shield
1
2
3
810D / 611D
M
Fig. 2-1 Safety electrical isolation
Fig. 2-1 shows the total potential of the 810D/611D/S7-300 system.
Meaning of reference numbers:
1. Floating power supply for SIMODRIVE electronics with 230VAC basic
2. Floating transistor triggers for the three-phase rectifier bridge with 230VAC
3. Floating transistor triggers for each axis of the three-phase inverter bridge
4. Floating signal connections from the NC to the PCU or HHU with 230VAC
5. Non-floating signal line between NC and I/O devices.
6. Non-floating user interface with safe electrical insulation for 230VAC through
7. Safe separation of 5VDC power supply fed from a 24VDC supply unit.
8. 24VDC power supply unit for external devices and for the machine matching
9. Floating interfaces to the machine (not accessible to the user).
10. Floating signal interfaces directly accessible to the end user (e.g.
11. 5VDC power supply with basic insulation, fed from a 24VDC supply.
2-30
MCP
4
11
4
HHU
4
Distributor box
5
10
5
Basic insulation Safe isolation
insulation.
basic insulation.
with 230VAC basic insulation.
basic insulation.
interfaces 1 to 4 and 7.
control according to applicable standard in the form of a PELV (Protective
Extra Low Voltage) circuit designed with safe electrical isolation.
RS-232-C). Make sure that either safe electrical isolation to the mains
voltage or two basic insulations each for 230 VAC are provided for these
interfaces.
SINUMERIK 810D Manual Hardware Configuration (PHC) - - 11.02 Edition
PCU
24V
4
11
6
S7-300 I/Os
10
Human
E Siemens AG, 2002. All rights reserved
11.02
12.95
8
M
7
Machine
9
11
Terminal
block