Rack
3.1 Rack UR6021 (6DD1682-0CH3)
SIMATIC TDC hardware
48 System Manual, 08/2017, A5E01114865-AL
The rack is equipped with a fan tray with 6 fans for forced convection of the modules and the
system power supply.
Since the rack is not equipped with an air filter, you should provide a filter on the cabinet if
necessary.
Note
For more information, refer to section "
Control cabinet (Page 20)".
Note
FANOPH
Using the FANOPH function block, you can read out the
operating hours counter of the fan
from the first CPU555 and monitor it for a limit.
The fans are monitored (speed). Activation of the monitoring function is delayed in order to
enable the reliable startup of the rack after you switched on power.
On failure of one or two fans, the power supply is shut down depending on the operating
mode in order to prevent thermal destruction of the modules.
The operating mode (SHUTDOWN MODE) is selected using switch S1.1, which is integrated
in the power supply. The power supply is shut down if one fan has failed and switch position
"ON" is set, or if two fans have failed and switch position "OFF" is set.
Safe isolation from supply
Switch off power to the rack before you remove the screws of the battery compartment.
The battery compartment cover must be unscrewed to actuate switch S1.
Observe the corresponding ESD directives.
The operating mode setting is indicated by the "SHUTDOWN MODE" LED on the front
panel.
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