Control Input/Output And Control Data; Digital Inputs; Sto Terminal; Analog Inputs - Danfoss VLT FC 103 Operating Manual

Operating Guide | VLT® Refrigeration Drive FC 103
Maximum cross-section to control terminals, cable with enclosed core
Minimum cross-section to control terminals

9.6 Control Input/Output and Control Data

9.6.1 Digital Inputs

All digital inputs are galvanically isolated from the supply voltage (PELV) and other high-voltage terminals.
Programmable digital inputs
Terminal number (1)
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
Input resistance, R
i
1
Terminals 27 and 29 can also be programmed as output.

9.6.2 STO Terminal 37

STO terminal 37 (terminal 37 is fixed PNP logic)
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 VLT
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.

9.6.3 Analog Inputs

Number of analog inputs
134 | Danfoss A/S © 2020.01
®
FC Series- Safe Torque Off Operating Guide.
AQ275652766279en-000101 / 130R0707
Specifications
2
0.5 mm /20 AWG
2
0.25 mm /24 AWG
4 (6)
18, 19, 27, 29, 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
Approximately 4 kΩ
0–24 V DC
<4 V DC
>20 V DC
28 V DC
50 mA rms
60 mA rms
400 nF
2