Cabling; Conductor Data - Bosch AMC2-4W Installation Manual

24 en | Installing
4.5

Cabling

Notice!
Risk of malfunction
The cables used in the AMC2-4W access control system are not
prone to electrical interference. However, you should avoid
routing cables close to heavy load switching cables and
equipment. If this is unavoidable, cross the cable at right angles
every 1 to 2 m (3 to 6 ft) to reduce interference.
4.5.1

Conductor data

With the calculation below you can find out which cable type
must be used. If you connect the power supply and the AMC-
device with the delivered cable set from the enclosure the
calculation is not necessary.
For distances below 25 m (75 ft) use AWG18 conductors
(1mm²). For longer distances, install an additional power supply
close to the AMC2 controller.
Please, calculate the voltage drop by checking the conductor
specifications for characteristic resistance values. The voltage
drop shall not exceed 2 V.
Example:
Length = 100 m/328 ft
U = 12V, I = 1A, maximum U
i.e. RAWG18 (acc. specs) = 6.385
U
Drop
U
Drop
Critical condition! Install the power supply closer to the
controller.
2016-11 | AMC2-4W |
= 20,948 x 0.1 km x 1A = 2.1V
= 6.385
= 2V
Drop
x 328 ft x 1A = 2.1V
Access Modular
Controller
or 20,948
Bosch Sicherheitssysteme