Back-Up Option Mcb 107 (Option D) - Danfoss VLT AutomationDrive FC 300 Design Manual

8. Options and Accessories
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NB (Array [6] is relay 7, array [7] is relay 8, and array [8] is relay 9)
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8.1.12. 24 V Back-Up Option MCB 107 (Option D)
External 24 V DC Supply
An external 24 V DC supply can be installed for low-voltage supply to the control card and any
option card installed. This enables full operation of the LCP (including the parameter setting)
without connection to mains.
External 24 V DC supply specification:
Input voltage range
Max. input current
Average input current for FC 302
Max cable length
Input capacitance load
Power-up delay
The inputs are protected.
142
The power to the live part connections on relay terminals must be disconnected.
Remove the LCP, the terminal cover and the LCP fixture from the FC 30x.
Fit the MCB 105 option in slot B.
Connect the control cables and fasten the cables with the enclosed cable strips.
Make sure the length of the stripped wire is correct (see the following drawing).
Do not mix live parts (high voltage) with control signals (PELV).
Fit the enlarged LCP fixture and enlarged terminal cover.
Replace the LCP.
Connect power to the frequency converter.
Select the relay functions in par. 5-40 [6-8], 5-41 [6-8] and 5-42 [6-8].
Do not combine 24/ 48 V systems with high voltage systems.
MG.33.B9.02 - VLT
24 V DC ±15 % (max. 37 V in 10 s)
® is a registered Danfoss trademark
FC 300 Design Guide
2.2 A
0.9 A
75 m
< 10 uF
< 0.6 s