Danfoss VLT FC 102 Series Design Manual page 67

Selection
Analog I/O configuration
3 x analog inputs, capable of handling following:
•
0–10 V DC
OR
•
0–20 mA (voltage input 0–10 V) by mounting a
510 Ω resistor across terminals (see NOTICE)
•
4–20 mA (voltage input 2–10 V) by mounting a
510 Ω resistor across terminals (see NOTICE)
•
Ni1000 temperature sensor of 1000 Ω at 32 °F
[0 °C]. Specifications according to DIN43760
•
Pt1000 temperature sensor of 1000 Ω at 32 °F
[0 °C]. Specifications according to IEC 60751
3 x Analog Outputs supplying 0–10 V DC.
NOTICE!
Note the values available within the different standard
groups of resistors:
E12: Closest standard value is 470 Ω, creating an input of
449.9 Ω and 8.997 V.
E24: Closest standard value is 510 Ω, creating an input of
486.4Ω and 9.728 V.
E48: Closest standard value is 511 Ω, creating an input of
487.3 Ω and 9.746 V.
E96: Closest standard value is 523 Ω, creating an input of
498.2 Ω and 9.964 V.
Analog inputs - terminal X42/1-6
Parameter group: 18-3*. See also VLT
Programming Guide.
Parameter groups for set-up: 26-0*, 26-1*, 26-2* and 26-3*.
®
See also VLT HVAC Drive Programming Guide.
3 x analog Used as temperature
inputs
sensor input
Operating -58–+302 °F
range [-50–+150 °C]
Resolution 11 bits
Accuracy
-58 °F [-50 °C]
±1 Kelvin
302 °F [+150 °C]
±2 Kelvin
Sampling 3 Hz
Max load
-
Impedance -
Table 3.8 Analog inputs - terminal X42/1-6
MG11BC22
Design Guide
When used for voltage, analog inputs are scalable by
parameters for each input.
When used for temperature sensor, analog inputs scaling is
preset to necessary signal level for specified temperature
span.
When analog inputs are used for temperature sensors, it is
possible to read out the feedback value in both °C and °F.
When operating with temperature sensors, maximum cable
length to connect sensors is 270 ft [82 m] non-shielded/
non-twisted wires.
Analog outputs - terminal X42/7-12
Parameter group: 18-3*. See also VLT
Programming Guide.
Parameter groups for set-up: 26-4*, 26-5* and 26-6*.
See also VLT
3 x analog
outputs
Volt
Analog outputs are scalable by parameters for each
output.
The function assigned is selectable via a parameter and
®
HVAC Drive
has the same options as for analog outputs on the control
card.
For a more detailed description of parameters, refer to the
VLT
Used as voltage input
Real time clock (RTC) with backup
The data format of RTC includes year, month, date, hour,
0–10 V DC
minutes and weekday.
10 bits
Accuracy of clock is better than ± 20 ppm at 77 °F [25 °C].
0.2% of full
scale at cal.
The built-in lithium backup battery lasts on average for
temperature
minimum 10 years, when adjustable frequency drive is
operating at 104 °F [40 °C] ambient temperature. If the
2.4 Hz
battery backup pack fails, the analog I/O option must be
± 20 V continuously
replaced.
Approximately 5 kΩ
Danfoss A/S © Rev. 06/2014 All rights reserved.
®
HVAC Drive Programming Guide.
Output Resolution Linearity
signal level
0–10 V DC 11 bits
Table 3.9 Analog outputs - terminal X42/7-12
®
HVAC Drive Programming Guide.
®
HVAC Drive
Max load
1% of full 1 mA
scale
65
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