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Rev. 1 | 01/2020 | MS Safety Module | © 2020 | Comepi srl
EN
6.5.4 Lift levelling application
The MS1A20-024 is designed to be employed in lift plants for oor levelling and relevelling of the cabin, according to the
requirements of EN 81-20 and EN 81-50 Standards, and according to the 2014/33/EU Lift Directive.
Re-Levelling
sensors
Lift
controller
K1
N
Drive
Safety
circuit of cabin
landing and
cabin doors
L
Lift controller
N
Sensor 1
Sensor 2
Pwr 24V (+/~)
A1
A2
X1 X2
S11 S12 S21 S22
13
14
23
24
L
Pwr 24V (-/~)
Start
X3
Information:
Lift car levelling safety module, designed according to Lift Directive 2014/33/EU and to safety circuit
requirements of EN 81-20, EN 81-50 Standards.
Information:
EN 81-20: Safety rules for the construction and installation of lifts. Part 20: passenger and goods/passenger
lifts.
EN 81-50: Safety rules for the construction and installation of lifts. Part 50: design rules, calculations,
examinations and tests of lift components.
Lift levelling with magnetic sensors
A
The module monitors the two re-levelling sensors and when the
cabin is in the re-levelling zone, it enables the safety outputs.
One safety output must be connected to bypass the circuit
that monitors the cabin landing and cabin doors, when the lift
cabin is inside the re-levelling zone; further to the landing and
re-levelling of the cabin at the oor, the safety module detects
eventual faults and the lift controller will stop the lift.
B
The inputs S12, S22 are connected to the re-levelling zone
sensors
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