Rack
3.1 Rack UR6021 (6DD1682-0CH3)
SIMATIC TDC hardware
50 System Manual, 08/2017, A5E01114865-AL
6. Pull the fan tray out of the rack by the handles.
The edges and corners of the front plate of the fan tray may cause injury. Use suitable
protective gloves to remove and install it.
7. Slide the new fan tray into the rack until it clicks and the faceplate is flush to the front
panel.
8. Fasten the fan tray (8 screws on the top and bottom of the fan tray).
9. Insert a new backup battery; see section "Battery backup (Page 45)".
10.If necessary, connect the wires to X1 (including the strain relief and shield connection).
11.Connect the power connector X2.
12.Switch on the power again.
Three 230 V signaling relays with floating potential facilitate external evaluation of the rack
system states.
Assignment of the contacts
Contacts consisting of combinations of safety extra-low voltage and hazardous voltages are
not permitted.
Contact in switched off state
Contact in error-free op-
eration
LED in error-free operation
FAN FAIL 5.6 Open Closed Off
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