Back-Up Option Mcb; Ptc Thermistor Card Mcb - Danfoss VLT AutomationDrive FC 300 Design Manual

Options and Accessories
9.6 24 V Back-Up Option MCB 107
An external 24 V DC supply can be installed for low-voltage supply to the control card and any installed options card,
enabling full operation of the LCP without connection to the 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
To install the 24 V Back-Up Option MCB 107, 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 backup external supply 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 automatically
disconnected. For more information on installation, consult
the separate instructions that accompany the optional
equipment.
®
VLT AutomationDrive FC 300 Design Guide 90-1200 kW
Illustration 9.14 24 V Back-up Power Supply Connection

9.7 PTC Thermistor Card MCB 112

The MCB 112 option makes it possible to monitor the
temperature of an electrical motor through a galvanically
isolated PTC thermistor input. It is a B-option for FC 302
with Safe Torque Off (STO).
For information on mounting and installing the option, see
the instructions that accompany it. For different
application possibilities, see .
X44/1 and X44/2 are the thermistor inputs. X44/12 enables
Safe Torque Off of the FC 302 (T-37) if the thermistor
values make it necessary, and X44/10 informs the FC 302
that a request for Safe Torque Off has come from the MCB
112 to ensure suitable alarm handling. One of the digital
inputs of the FC 302 (or a DI of a mounted option) must
be set to PTC Card 1 [80] in order to use the information
MG34S202 - Rev. 2013-08-19
24 V DC ±15% (max. 37 V in 10 s)
2.2 A
0.9 A
75 m
10 uF
0.6 s
9 9
233