Sensor Input Option Mcb; Ordering Code Numbers And Parts Delivered; Electrical And Mechanical Specifications - Danfoss VLT HVAC Design Manual

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VLT HVAC Drive Selection

3.1.11 Sensor Input Option MCB 114

The sensor input option card MCB 114 can be used in the
following cases:
•
Sensor input for temperature transmitters PT100
and PT1000 for monitoring bearing temperatures
•
As general extension of analog inputs with one
additional input for multi-zone control or differ-
ential pressure measurements
•
Support extended PID controllers with I/Os for set
point, transmitter/sensor inputs
Typical motors, designed with temperature sensors for
protecting bearings from being overloaded, are fitted with
3 PT100/1000 temperature sensors. One in front, one in
the back end bearing, and one in the motor windings. The
Danfoss Option MCB 114 supports 2- or 3-wire sensors
with individual temperature limits for under/over
temperature. An auto detection of sensor type, PT100 or
PT1000 takes place at power up.

3.1.11.2 Electrical and Mechanical Specifications

Analog Input
Number of analog inputs
Format
Wires
Input impedance
Sample rate
3rd order filter
The option is able to supply the analog sensor with 24V
DC (terminal 1).
Temperature Sensor Input
Number of analog inputs supporting PT100/1000
Signal type
Connection
Frequency PT100 and PT1000 input
Resolution
Temperature range
Galvanic Isolation
The sensors to be connected are expected to be galvanically isolated from the mains voltage
level
Cabling
Maximum signal cable length
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VLT HVAC Drive Design Guide
The option can generate an alarm if the measured
temperature is either below low limit or above high limit
specified by the user. The individual measured temperature
on each sensor input can be read out in the display or by
readout parameters. If an alarm occurs, the relays or digital
outputs can be programmed to be active high by selecting
[21] Thermal Warning in parameter group 5-**.
A fault condition has a common warning/alarm number
associated with it, which is Alarm/Warning 20, Temp. input
error. Any present output can be programmed to be active
in case the warning or alarm appears.
3.1.11.1 Ordering Code Numbers and Parts
Standard version code no: 130B1172.
Coated version code no: 130B1272.
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MG11BB02 - VLT is a registered Danfoss trademark
Delivered
PT 100 2 or 3 wire/PT1000 2 or 3 wire
1Hz for each channel
IEC 61800-5-1 and UL508C
3
1
0-20mA or 4-20mA
2
<200Ω
1kHz
100Hz at 3dB
3
PT100/1000
10 bit
-50 - 204°C
-58 - 399°F
500m
59
3