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
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 k
Ω
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
20 Hz/100 Hz
The analog inputs are galvanically isolated from the supply voltage (PELV) and other high-voltage terminals.
Specifications
VLT
®
HVAC Drive Operating Instructions
78
MG11AI02 - VLT
®
is a registered Danfoss trademark
10
10
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.ctiautomation.net - Email: [email protected]
