7.6 Control Input/Output and Control Data
Digital inputs
Programmable digital inputs
4 (6)
1)
Terminal number
18, 19, 27
1)
, 29
1)
, 32, 33
Logic
PNP or NPN
Voltage level
0–24 V DC
Voltage level, logic 0 PNP
<5 V DC
Voltage level, logic 1 PNP
>10 V DC
Voltage level, logic 0 NPN
2)
>19 V DC
Voltage level, logic 1 NPN
2)
<14 V DC
Maximum voltage on input
28 V DC
Pulse frequency range
0–110 kHz
(Duty cycle) Min. pulse width
4.5 ms
Input resistance, R
i
Approximately 4 kΩ
Safe Torque Off (STO) Terminal 37
3), 4)
(Terminal 37 is fixed PNP logic)
Voltage level
0–24 V DC
Voltage level, logic 0 PNP
<4 V DC
Voltage level, logic 1 PNP
>20 V DC
Maximum voltage on input
28 V DC
Typical input current at 24 V
50 mA
rms
Typical input current at 20 V
60 mA
rms
Input capacitance
400 nF
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 torque off input terminal 37.
3) See VLT
®
Frequency Converters – Safe Torque Off Operating Instructions for further information about terminal 37 and safe
torque off.
4) When using a contactor with a DC coil in combination with STO, always make a return path for the current from the coil
when turning it off. The return path can be made 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.
Specifications
Design Guide
MG16G202
Danfoss A/S © 08/2015 All rights reserved.
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Содержание VLT FC 103
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