Danfoss VLT Midi Drive FC 280 Design Guide

7.5 Cable Specications
Cable lengths and cross-sections
1)
Maximum motor cable length, shielded 50 m (164 ft)
Maximum motor cable length, unshielded 75 m (246 ft)
Maximum cross-section of control terminals, exible/rigid wire 2.5 mm
2
/14 AWG
Minimum cross-section of control terminals 0.55 mm
2
/30 AWG
Maximum STO input cable length, unshielded 20 m (66 ft)
1) For power cables, see Table 7.1 and Table 7.2.
7.6 Control Input/Output and Control Data
Digital inputs
Terminal number 18, 19, 27
1)
, 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 4–32 kHz
(Duty cycle) minimum pulse width 4.5 ms
Input resistance, R
i
Approximately 4 kΩ
1) Terminal 27 can also be programmed as output.
STO inputs
Terminal number 37, 38
Voltage level 0–30 V DC
Voltage level, low <1.8 V DC
Voltage level, high >20 V DC
Maximum voltage on input 30 V DC
Minimum input current (each pin) 6 mA
Analog inputs
Number of analog inputs 2
Terminal number 53
1)
, 54
Modes Voltage or current
Mode select Software
Voltage level 0–10 V
Input resistance, R
i
Approximately 10 kΩ
Maximum voltage -15 V to +20 V
Current level 0/4 to 20 mA (scaleable)
Input resistance, R
i
Approximately 200 Ω
Maximum current 30 mA
Resolution for analog inputs 11 bit
Accuracy of analog inputs Maximum error 0.5% of full scale
Bandwidth 100 Hz
The analog inputs are galvanically isolated from the supply voltage (PELV) and other high-voltage terminals.
1) Terminal 53 supports only voltage mode and can also be used as digital input.
Specications
VLT
®
Midi Drive FC 280
78 Danfoss A/S © 03/2016 All rights reserved. MG07B102
77

Danfoss VLT Midi Drive FC 280 Specifications

General

Brand	Danfoss
Model	VLT Midi Drive FC 280
Category	DC Drives
Language	English