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

FC 300 Design Guide
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.
Terminal numbers:
Terminal 35: - external 24 V DC supply .
Terminal 36: + external 24 V DC supply.
Follow these steps:
1. Remove the LCP or Blind Cover
2. Remove the Terminal Cover
3. Remove the Cable Decoupling Plate and
the plastic cover underneath
4. Insert the 24 V DC Back-up External Sup-
ply Option in the Option Slot
5. Mount the Cable Decoupling Plate
6. Attach the Terminal Cover and the LCP or
Blind Cover.
When MCB 107, 24 V back-up option is supplying
the control circuit, the internal 24 V supply is au-
tomatically disconnected.
270
Options and Accessories
Connection to 24 V back-up supplier (≤ 7.5 kW).
Connection to 24 V back-up supplier (11-22 kW).
MG.33.B7.02 - VLT is a registered Danfoss trademark
24 V DC ±15 % (max. 37 V in 10 s)
2.2 A
0.9 A
75 m
< 10 uF
< 0.6 s