Danfoss VLT FCD 302 Operating Manual page 66

Operating Guide | VLT® Decentral Drive FCD 302
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) Minimum pulse width
Input resistance, R
i
1) Terminals 27 and 29 can also be programmed as output.
The digital input is galvanically isolated from the supply voltage (PELV) and other high voltage terminals.
7.7.2 STO Terminal 37
Voltage level
Voltage level, logic 0 PNP
Voltage level, logic 1 PNP
Maximum voltage on input
Typical input current at 24 V
Typical input current at 20 V
Input capacitance
All digital inputs are galvanically isolated from the supply voltage (PELV) and other high-voltage terminals.
For further information about terminal 37 and Safe Torque Off, see the Safe Torque Off Operating Guide.
When using a contactor with a DC coil inside with STO, it is important to make a return way for the current from the coil when turning it
off. The return way can be created by using a freewheel diode (or, alternatively, a 30 V or 50 V MOV for quicker response time) across the
coil. Typical contactors can be bought with this diode.
7.7.3 Analog Inputs
Number of analog inputs
Terminal number
Modes
Mode select
Voltage mode
Voltage level
Input resistance, R
i
Maximum voltage
Current mode
Current level
Input resistance, R
i
66 | Danfoss A/S © 2025.04
Specifications
PNP or NPN
<5 V DC
>10 V DC
>19 V DC
<14 V DC
28 V DC
0–110 kHz
Approximately 4 kΩ
0–24 V DC
<4 V DC
>20 V DC
28 V DC
50 mA rms
60 mA rms
Voltage or current
Switch S201 and switch S202
Switch S201/S202 = OFF (U)
0 V to +10 V (scalable)
Approximately 10 kΩ
Switch S201/S202 = ON (I)
0/4 mA to 20 mA (scaleable)
Approximately 200 Ω
AQ267036816112en-000301 / 130R0208
0–24 V
4.5 ms
400 nF
2
53, 54
±20 V