Danfoss FC 300 Design Manual page 79

FC 300 Design Guide
Protection and Features:
• Electronic thermal motor protection against overload.
• Temperature monitoring of the heatsink ensures that the frequency converter trips if the temperature reaches a predefined level. An overload
temperature cannot be reset until the temperature of the heatsink is below the values stated in the tables on the following pages (Guideline -
these temperatures may vary for different power sizes, frame sizes, enclosure ratings 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 2)
Voltage level, logic '1' NPN 2)
Maximum voltage on input
Pulse frequency range
(Duty cycle) Min. pulse width
Input resistance, R
i
3)
Safe stop Terminal 37 (Terminal 37 is fixed PNP logic):
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 terminals.
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 AutomationDrive FC 302 and AutomationDrive 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) AutomationDrive FC 302 only.
AutomationDrive FC 301: 4 (5)
MG.33.BC.02 - VLT ® is a registered Danfoss trademark
4 AutomationDrive FC 300 Selection
1)
/ AutomationDrive FC 302: 4 (6)
1)
18, 19, 27 , 29
PNP or NPN
0 - 24 V DC
0 - 110 kHz
approx. 4 kΩ
0 - 24 V DC
50 mA rms
60 mA rms
4
1)
1)
, 32, 33,
< 5 V DC
> 10 V DC
> 19 V DC
< 14 V DC
28 V DC
4.5 ms
< 4 V DC
>20 V DC
400 nF
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