Rev. 1.2 of 12.2020
19
4.13.
MKL Module
–
Supply Line Control Module
This module makes it possible to detect the damage in power cables for peripheral
actuators (e.g. fan motors, fire damper actuators). The MKL module makes the Control Panel
capable of continuously supervising the status of the system supplying energy receivers.
3.8.1
MKL N-780
The N-780 Line Control Module makes it possible to detect open and short circuits in the
fans power and control circuit along with the supervision of the motor winding. Due to the
use of MKL N-780 it is possible to monitor the service (repair) switch applied in the fan
wirelessly. Disconnecting the fan power and control circuit by the service switch is detected
by the MKL N-780 module as an open transmission circuit which triggers the alarm. Thanks
to this functionality, the cost of the service switch alone is reduced (no need for extending
the circuit with additional position monitoring contacts) and the cost of the additional cable
for monitoring the service switch position contact is completely eliminated.
With the use of MKL N780 it is possible to monitor power cables for fan motors in the
following configurations:
•
two fans with direct start-up (star or delta)
•
two fans supplied and controlled by frequency inverters
•
single fan with a star-delta start-up
•
single two-speed and/or two-way Dahlander fan
Connecting the Module:
Installation:
on a DIN rail
1
–
1
–
24 V power supply
2
–
signalling LEDs
3
–
S1 button
4
–
2
–
230 V AC power supply
5
–
“contactor” input
6
–
potential-free contact
7
–
motor winding inputs
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