Danfoss VLT AutomationDrive FC 300 Design Manual page 60

FC 300 Design Guide
• Electronic thermal motor protection against overload.
• Temperature monitoring of the heatsink ensures that the frequency converter trips if the tem-
perature reaches 95 °C ± 5°C. An overload temperature cannot be reset until the temperature
of the heatsink is below 70 °C ± 5°C (Guideline - these temperatures may vary for different power
sizes, enclosures etc.).
• The frequency converter is protected against short-circuits on motor terminals U, V, W.
• If a mains phase is missing, the frequency converter trips or issues a warning (depending on the
load).
• Monitoring of the intermediate circuit voltage ensures that the frequency converter trips if the
intermediate circuit voltage is too low or too high.
• The frequency converter constantly checks for critical levels of internal temperature, load current,
high voltage on the intermediate circuit and low motor speeds. As a response to a critical level,
the frequency converter can adjust the switching frequency and/ or change the switching pattern
in order to ensure the performance of the drive.
Digital inputs:
Programmable digital inputs
Terminal number
Logic
Voltage level
Voltage level, logic'0' PNP
Voltage level, logic'1' PNP
Voltage level, logic '0' NPN
Voltage level, logic '1' NPN
Maximum voltage on input
Pulse frequency range
(Duty cycle) Min. pulse width
Input resistance, R
i
Safe stop Terminal 37
Voltage level
Voltage level, logic'0' PNP
Voltage level, logic'1' PNP
Nominal input current at 24 V
Nominal input current at 20 V
Input capacitance
All digital inputs are galvanically isolated from the supply voltage (PELV) and other high-voltage termi-
nals.
1) Terminals 27 and 29 can also be programmed as output.
2) Except safe stop input Terminal 37.
3) Terminal 37 is only available in FC 302 and FC 301 A1 with Safe Stop. It can only be used as safe
stop input. Terminal 37 is suitable for category 3 installations according to EN 954-1 (safe stop according
to category 0 EN 60204-1) as required by the EU Machinery Directive 98/37/EC. Terminal 37 and the
Safe Stop function are designed in conformance with EN 60204-1, EN 50178, EN 61800-2, EN 61800-3,
and EN 954-1. For correct and safe use of the Safe Stop function follow the related information and
instructions in the Design Guide.
4) FC 302 and FC 301/ A1 with safe stop only.
60
FC 300 Selection
2)
2)
3)
(Terminal 37 is fixed PNP logic):
MG.33.B8.02 - VLT ® is a registered Danfoss trademark
FC 301: 4 (5) / FC 302: 4 (6)
18, 19, 27 1) , 29 4) , 32, 33,
PNP or NPN
0 - 24 V DC
< 5 V DC
> 10 V DC
> 19 V DC
< 14 V DC
28 V DC
0 - 110 kHz
4.5 ms
approx. 4 kΩ
0 - 24 V DC
< 4 V DC
>20 V DC
50 mA rms
60 mA rms
400 nF