Danfoss VLT HVAC Drive FC 100 Series, Руководство по конструкции

Страница: 66 / 207

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
setpoint, transmitter/sensor inputs
Typical motors, designed with temperature sensors for
protecting bearings from being overloaded, are fitted with
three 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.
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
Delivered
Standard version code no: 130B1172.
Coated version code no: 130B1272.
3.1.11.2 Electrical and Mechanical Specifications
Analog Input
Number of analog inputs
1
Format 0–20mA or 4–20mA
Wires 2
Input impedance <200
Ω
Sample rate 1kHz
Third order filter 100Hz at 3dB
The option is able to supply the analog sensor with 24V
DC (terminal 1).
Temperature Sensor Input
Number of analog inputs supporting PT100/1000
3
Signal type PT100/1000
Connection PT 100 2 or 3 wire/PT1000 2 or 3 wire
Frequency PT100 and PT1000 input 1Hz for each channel
Resolution 10 bit
Temperature range
-50–204
°
C
-58–399
°
F
Galvanic Isolation
The sensors to be connected are expected to be galvanically isolated from the AC line voltage
level.
IEC 61800-5-1 and UL508C
Cabling
Maximum signal cable length
1640 ft [500 m]
VLT
®
HVAC Drive Selection VLT
®
HVAC Drive Design Guide
3-10 MG11BB22 - VLT
®
is a registered Danfoss trademark
3 3