Danfoss VLT AutomationDrive FC 301, Руководство по конструкции, Страница: 165 / 200

Electrical Data
Relays
Numbers
4 SPDT
Load at 250 V AC/30 V DC 8 A
Load at 250 V AC/30 V DC with cos = 0.4 3.5 A
Over voltage category (contact-earth) III
Over voltage category (contact-contact) II
Combination of 250 V and 24 V signals Possible with one unused relay in-between
Maximum thru-put delay 10 ms
Isolated from ground/chassis for use on IT mains systems
Digital Inputs
Numbers
7
Range 0/24 V
Mode PNP/ NPN
Input impedance 4 kW
Low trigger level 6.4 V
High trigger level 17 V
Maximum thru-put delay 10 ms
Analog Outputs
Numbers
2
Range 0/4 -20 mA
Resolution 11 bit
Linearity <0.2%
11.2.8 VLT ®
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 to
protect 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.
The option can generate an alarm if the measured
temperature is either below the low limit or above the
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-** Digital In/Out .
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.
Options and Accessories
VLT
®
AutomationDrive FC 301/FC 302 Design Guide, 0.25-75 kW
MG33BF02 - Rev. 2013-12-20 163
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