Ptc Thermistor Card Mcb - Danfoss FC 102 Design Manual

Selection
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.
3 3
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
3 x Analog
inputs
Operating range -50 to +150 °C
Resolution
Accuracy
Sampling
Max load
Impedance
Table 3.8 Analog inputs - terminal X42/1-6
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 feedback value in both °C and °F.
When operating with temperature sensors, maximum cable
length to connect sensors is 80 m non-screened/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 HVAC Drive Programming Guide.
58
®
HVAC Drive
HVAC Drive Programming Guide.
Used as temperature Used as voltage input
sensor input
0 - 10 V DC
11 bits 10 bits
-50 °C 0.2% of full
±1 Kelvin scale at cal.
+150 °C temperature
±2 Kelvin
3 Hz 2.4 Hz
- ± 20 V continuously
- Approximately 5 kΩ
®
HVAC Drive
Danfoss A/S © Rev. 06/2014 All rights reserved.
Design Guide
3 x Analog
outputs
Volt
Table 3.9 Analog outputs - terminal X42/7-12
Analog outputs are scalable by parameters for each
output.
The function assigned is selectable via a parameter and
have same options as for analog outputs on control card.
For a more detailed description of parameters, refer to the
®
VLT HVAC Drive Programming Guide.
Real-time clock (RTC) with back-up
The data format of RTC includes year, month, date, hour,
minutes and weekday.
Accuracy of clock is better than ± 20 ppm at 25 °C.
The built-in lithium back-up battery lasts on average for
minimum 10 years, when frequency converter is operating
at 40 °C ambient temperature. If battery pack back-up fails,
analog I/O option must be exchanged.

3.1.10 PTC Thermistor Card MCB 112

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 frequency
converter with Safe Torque Off.
For information on mounting and installation of the
option, see chapter 3.1.1 Mounting of Option Modules in Slot
B. See also chapter 7 Application Examples for different
application possibilities.
X44/1 and X44/2 are the thermistor inputs. X44/12 enables
Safe Torque Off of the frequency converter (T-37), if the
thermistor values make it necessary, and X44/10 informs
the frequency converter that a request for safe torque off
came from the MCB 112 to ensure a suitable alarm
handling. One of the digital inputs parameters (or a digital
input of a mounted option) must be set to [80] PTC Card 1
to use the information from X44/10. Configure
5-19 Terminal 37 Safe Stop to the desired Safe Torque Off
functionality (default is Safe Stop Alarm).
Output Resolution Linearity
signal level
0-10 V DC 11 bits 1% of full
scale
Max load
1 mA
MG11BC02