Siemens NCZ Specifications download pdf (Page 28)

2.1 Supplementary electrical conditions

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SINUMERIK 810D Equipment Manual Configuration CCU (PHC) – 03/2006 Edition

2.1.3 Grounding Concept

The SINUMERIK 810D system consists of a number of individual components,

each of which must comply with the appropriate EMC and safety standards. The

individual system components are:

 CCU box

 Machine control panel MCP

 Keyboard

 Operator panels (operator panel front + PCU/TCU)

 NCU terminal block

 Distributor box and handheld unit

 S7-300 I/O with IM 361 interface module

 Single I/O module

CCU box and SIMODRIVE components are fixed to a metal cabinet plate with

screws. Make sure that near the screws a low-impedance contact of the CCU

box with the cabinet panel can be made. Insulating varnishes must be removed

where possible. The connection must be kept free of corrosion.

The electronics grounds of the modules are interconnected via the unit and con-

trol bus and also routed to terminal X151 of the NE module.

The ground and module ground M should be connected at the power supply

terminal of the IM 361. Further, for the EFP, “SHIELD” and “M24” must be con-

nected in connector X1.

Connection Conditions

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Siemens NCZ Specifications Page 28