06.03
1.1 Overview of SINUMERIK 840Di
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Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
1.1.2 Hardware components
The hardware basis for the SINUMERIK 840Di is an industrial PC (further re-
ferred to as PCU (PC Unit) from Siemens A&D in conjunction with the MCI
board (Motion Control Interface).
The SINUMERIK 840Di is available with the following PCU variants, each with
24V power supply:
S PCU 50
– Pentium II 333MHz, 128MB SDRAM, 2 expansion slots
– Pentium III 500MHz, 128MB SDRAM, 2 expansion slots
– Celeron 566MHz, 128MB SDRAM, 2 expansion slots
– Celeron 1.2GHz, 256MB SDRAM, 2 expansion slots
S PCU 70
– Pentium III 500MHz, 128MB SDRAM, 4 expansion slots.
The PCU features interfaces to connect the new SINUMERIK front panels (OP
0xx) as well as standard PC interfaces for connecting e.g. monitor, keyboard,
mouse and Ethernet connection.
The PCU has the following expansion slots:
– PCU 50 and PCU 70
1x shared ISA/PCI (length: max. 175mm, occupied with option MCI
board extension and MCI board extension slot variant)
– PCU 50
1x PCI (length: max. 265mm, occupied by the MCI board)
– PCU 70
3x PCI (length: max. 265mm, one occupied by the MCI board).
The MCI board is a 2/3 long PCI plug-in card (265mm) with integrated SIMATIC
S7-compatible PLC315-2DP as a routing-capable DP master. In addition, it has
interfaces for:
– PROFIBUS DP with Motion Control Functionality
– MPI (Multi Point Interface)
– MCI board extension (option).
Drives and external I/Os are connected to the SINUMERIK 840Di in a distrib-
uted system by means of the PROFIBUS DP interface with Motion Control ca-
pability (synchronous and equidistant data exchange between DP master and
DP slaves).
Machine control panel, handheld operator and programming units (e.g. PG 740)
are connected through the MPI interface.
A maximum of four fast digital I/Os, two sensing probes and two handwheels
each can be connected using the optional MCI board extension.
PCU
PCU Interfaces
PCU expansion
slots
MCI board
PROFIBUS DP
interface
MPI interface
MCI board
extension
(option)
1 General on the SINUMERIK 840Di
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