Cable Dimensioning; Max. Cable Length; 8.1.1 Formula For The Calculation Of The Maximum Actuator Cable Length; 8.1.2 Max Cable Length - ±24V Standard Actuators - Window Master MotorController WCC 310 Installation Instructions Manual

Cable dimensioning

8
8.1

Max. cable Length

Maximum permissible cable length from the MotorController to the actuators taking into account the cable cross-section is
shown in the following tables for "± 24V standard actuators" and "MotorLink

8.1.1 Formula for the calculation of the maximum actuator cable length

Max. cable length = permissible voltage drop 2V (UL) x conductivity of copper(56) x cable cross section in mm
For both ±24V standard actuators and actuators with MotorLink
regardless of the result of above formula.
Maximum actuator cable length: Always measured from the MotorController to the last junction box + cable to the motor
Permissible max. voltage drop in the line: 2 Volt
Actuating current: Sum of all actuator power consumption per motor line
Note: do not use the PE wire / green/yellow wire in the motor cable for communication!
Example
Max actuator cable length with cable cross section 0.75mm
8.1.2 Max cable length – ±24V standard actuators
The actuator supply cable must have 2 wires. If cable monitoring is requested min. 3: 2 wires current carrying / 1 wire for
monitoring.
cable cross
section [a]
Total
actuator current [I]
1A
2A
3A
4A
5A
6A
7A
8A
9A
10A
20A
8.1.3 Max cable length – actuators with MotorLink
The actuator supply cable must have 3 wires: 2 wires current carrying / 1 wire for communication.
When a 5 wire cable is used for MotorLink
It is not recommended to use parallel-wire.
actuator
max. current total in amps (I) x 2
±24V standard Actuators
Do not use the PE wire / green/yellow wire!
3 wire 3 wire
0,75mm² 1,50 mm²
42m 84m
21m 42m
14m 28m
11m 21m
8m 17m
7m 14m
6m 12m
5m 11m
9m
8m
4m
®
®
actuators".
®
the cross section of the cable must not be less than 0.75mm
2
and actuator current 2A: (2 x 56 x 0.75) : (2 x 2) = 21m
5 wire 3 wire
1,50 mm² 2,50 mm²
2 wire
parallel
168m 140m
84m 70m
56m 47m
42m 35m
34m 28m
28m 23m
24m 20m
21m 18m
18m 15m
16m 14m
8m
®
ML-comm = MotorLink
2
5 wire
2,50 mm²
2 wire
parallel
280m
140m
93m
70m
56m
47m
40m
35m
31m
28m
7m 14m
®
communication
(a)
2
3 wire
4,00 mm²
224m
112m
75m
56m
45m
37m
32m
28m
25m
22m
11m
9