NOTE!
Please 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
486.4
Ω
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 for read out: 18-3*. See also
VLT
®
HVAC
Drive Programming Guide, MG11CXYY.
Parameter groups for set-up: 26-0*, 26-1*, 26-2* and 26-3*.
See also
VLT
®
HVAC Drive Programming Guide, MG11CXYY.
3 x analog inputs
Operating range
Resolution
Accuracy
Sampling
Max load
Impedance
Used as
temperature
sensor input
-58° to 302°F [-50–
+150°C]
11 bits
-58°F [-50°C]
±1 Kelvin
302°F [+150°C]
±2 Kelvin
3Hz
-
-
Used as
voltage input
0–10V DC
10 bits
0.2% of full
scale at cal.
temperature
2.4Hz
+/- 20V
continuously
Approximately
5k
Ω
Table 3.7
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 262 ft [80 m] non-shielded/
non-twisted wires.
Analog outputs - terminal X42/7-12
Parameter group for read out and write: 18-3*. See also
VLT
®
HVAC Drive Programming Guide, MG11XYY
Parameter groups for set-up: 26-4*, 26-5* and 26-6*. See
also
VLT
®
HVAC Drive Programming Guide, MG11XYY
3 x analog
outputs
Output
signal level
Resolution Linearity
Max load
Volt
0–10V DC
11 bits
1% of full
scale
1mA
Table 3.8
Analog outputs are scalable by parameters for each
output.
The function assigned is selectable via a parameter and
has the same options as for analog outputs on the control
card.
For a more detailed description of parameters, please refer
to the
VLT
®
HVAC Drive Programming Guide, MG11CXYY
.
Real-time clock (RTC) with backup
The data format of RTC includes year, month, date, hour,
minutes and weekday.
Accuracy of clock is better than
±
20 ppm at 77°F [25
°
C].
The built-in lithium backup battery lasts on average for
minimum 10 years, when Adjustable frequency drive is
operating at 104°F [40
°
C] ambient temperature. If the
battery backup pack fails, the analog I/O option must be
replaced.
3.1.10 MCB 112 VLT
®
PTC Thermistor Card
The MCB 112 option makes it possible to monitor the
temperature of an electrical motor through a galvanically-
isolated PTC thermistor input. It is a B option for FC 102
with safe stop.
For information on mounting and installation of the
option, please see earlier in this section. See also
6 Application Examples
for different application possibilities.
VLT
®
HVAC Drive Selection
VLT
®
HVAC Drive Design Guide
MG11BB22 - VLT
®
is a registered Danfoss trademark
3-7
3
3
