Danfoss VLT FC 103 Operating Guide

Maximum cross-section to control terminals, cable with enclosed core
0.5 mm
2
/20 AWG
Minimum cross-section to control terminals
0.25 mm
2
/24 AWG
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 4 (6)
Terminal number
(1)
18, 19, 27, 29, 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 >19 V DC
Voltage level, logic 1 NPN <14 V DC
Maximum voltage on input 28 V DC
Pulse frequency range 0–110 kHz
Input resistance, R
i
Approximately 4 kΩ
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 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.
For further information about terminal 37 and Safe Torque Off, see the VLT
®
FC Series- 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.
9.6.3 Analog Inputs
Number of analog inputs 2
Specifications
Operating Guide | VLT® Refrigeration Drive FC 103
AQ275652766279en-000101 / 130R0707
134 | Danfoss A/S © 2020.01

Danfoss VLT FC 103 Specifications

General

Brand	Danfoss
Model	VLT FC 103
Category	DC Drives
Language	English