Danfoss VLT Design Guide

(Duty cycle) Min. pulse width 4.5 ms
Input resistance, R
i
approx. 4 kΩ
Safe Stop 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 Stop input Terminal 37.
3)
See for further information about terminal 37 and Safe Stop.
4)
When using a contactor with a DC coil inside in combination with Safe Stop, it is important to make a return way for the
current from the coil when turning it off. This can be done by using a freewheel diode (or, alternatively, a 30 or 50 V MOV for
quicker response time) across the coil. Typical contactors can be bought with this diode.
Analog inputs
Number of analog inputs 2
Terminal number 53, 54
Modes Voltage or current
Mode select Switch S201 and switch S202
Voltage mode Switch S201/switch S202 = OFF (U)
Voltage level -10 to +10 V (scaleable)
Input resistance, R
i
approx. 10 kΩ
Max. voltage ±20 V
Current mode Switch S201/switch S202 = ON (I)
Current level 0/4 to 20 mA (scaleable)
Input resistance, R
i
approx. 200 Ω
Max. current 30 mA
Resolution for analog inputs 10 bit (+ sign)
Accuracy of analog inputs Max. 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.
Illustration 8.1
Pulse inputs
Programmable pulse 2/1
Terminal number pulse 29, 33
1)
/32
2)
, 33
2)
Max. frequency at terminal 29, 32, 33 110 kHz (Push-pull driven)
Max. frequency at terminal 29, 32, 33 5 kHz (open collector)
Min. frequency at terminal 29, 32, 33 4 Hz
Voltage level see 8.1.2 Digital Inputs
Maximum voltage on input 28 V DC
General Specifications and ...
VLT
®
Refrigeration Drive Design Guide
MG16G102 - VLT
®
is a registered Danfoss trademark 113
8
8

Danfoss VLT Specifications

General

Frequency	50/60 Hz
Enclosure	IP20, IP21, IP55, IP66
Series	VLT
Control Technique	Flux Vector Control
Output Voltage	0-Vinput
Control Method	Fieldbus
Communication Interface	PROFIBUS, CANopen
Protection Features	Overload, Overvoltage, Undervoltage, Short Circuit, Ground Fault
Cooling Method	Liquid Cooled
Storage Temperature	-25°C to +70°C
Relative Humidity	5-95% non-condensing
Altitude	Up to 1000m (3280ft) without derating, up to 4000m (13120ft) with derating
Operating Temperature	-10°C to +50°C (14°F to 122°F)