SIMATIC TDC hardware
System Manual, 08/2017, A5E01114865-AL
39
Rack UR6021 (6DD1682-0CH3)
3.1.1
Rack UR6021 with 21 slots forms the mechanical base for SIMATIC TDC
The system power supply is installed in the rear area of rack.
There is a fan tray in the upper part of the rack, which includes the monitoring and signaling
functions in addition to the fans.
The fan tray can be ordered as spare part (6DD1683-0CH3) and can be replaced by
qualified personnel.
A high-performance 64-bit backplane bus supports high-speed data exchange between the
inserted modules.
The CPU555 used in UR6021 supports P0 functionality.
For fast, direct communication between CPU555 modules, the rack UR6021 has a P0
connector in slots 01, 02, 03, 04, 09, 11, 13 and 15. Each CPU555 can communicate with up
to 7 additional CPU555 by means of the PCIe interface via the backplane bus (P0
connector). This means that a point-to-point connection always exists between any two
CPU555 modules.
Ventilation/cooling (Page 48)
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