Siemens SINUMERIK 840D Maintenance Manual

FADAL MACHINING CENTERS
36 PRE-INSTALLATION PROCEDURES MAN-0126_R1
• intermediate metal conduit
• electrical metallic tubing or cable armor
4. One end of the supplemental grounding conductor shall be attached to the VMC’s
ground bus. The other end shall be effectively bonded to a copper cold water pipe
that is in direct contact with the earth for 10 feet or more (See Figure 2-5: Bond
Grounding Conductor to Copper Cold Water Pipe).
5. Connections shall be made so that they are electrically continuous.
Figure 2-5: Bond Grounding Conductor to Copper Cold Water Pipe
WARNING!
Many problems that are difficult to diagnose can occur if the VMC is not properly
grounded. Proper grounding cannot be overemphasized.

Siemens SINUMERIK 840D Specifications

General

Series	SINUMERIK 840D
Axes	Up to 31
Channels	Up to 10
Operating System	Windows-based
Power Supply	24 V DC
Control Unit Type	CNC
Interface	Ethernet, PROFIBUS
Display	TFT color display
Interpolation	Spline
PLC	Integrated PLC
Data Storage	CompactFlash, USB