Danfoss VLT HVAC Drive - Page 145

Cable lengths and cross-sections:
Max. motor cable length, shielded/armored VLT AQUA Drive: 492 ft [150 m]
Max. motor cable length, unshielded/unarmored VLT AQUA Drive: 984 ft [300 m]
Max. cross-section to motor, line power, load sharing and brake *
Maximum cross-section to control terminals,
rigid wire
0.0023 in.
2
[1.5 mm
2
]/16 AWG (2 x 0.0012 in.
2
[2 x 0.75 mm
2
])
Maximum cross-section to control terminals, flexible cable 0.0016 in.
2
[1 mm
2
]/18 AWG
Maximum cross-section to control terminals, cable with en-
closed core
0.00078 in.
2
[0.5 mm
2
]/20 AWG
Minimum cross-section to control terminals 0.00039 in.
2
[0.25 mm
2
]
* See Line Supply tables for more information!
Digital inputs:
Programmable digital inputs 4 (6)
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
Input resistance, R
i
approx. 4 k
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.
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 : 0 to + 10 V (scaleable)
Input resistance, R
i
approx. 10 k
Max. voltage ± 20 V
Current mode Switch S201/switch S202 = ON (I)
Current level 0/4 to 20 mA (scalable)
Input resistance, R
i
approx. 200 
Max. current 30 mA
Resolution for analog inputs 10 bit (+ sign)
Accuracy of analog inputs Max. error 0.5% of full scale
Bandwidth : 200 Hz
The analog inputs are galvanically isolated from the supply voltage (PELV) and other high-voltage
terminals.
VLT
®
HVAC Drive Instruction Manual 8. Specifications
MG.11.A4.22 - VLT
®
is a registered Danfoss trademark 145
8