Access Modular Controller 2 Installing | en 41
Bosch Access Systems V.B. Installation manual 2020-01 | V02 |
For distances below 25m (75ft) 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 2V.
Example:
Length = 100 m/328 ft
U = 12V, I = 1A, maximum U
Drop
= 2V
i.e. RAWG18 (acc. specs) = 6.385 or 20,948
U
Drop
= 20,948 x 0.1 km x 1A = 2.1V
U
Drop
= 6.385 x 328 ft x 1A = 2.1V
Critical condition! Install the power supply closer to the controller.
External power supplies used must be UL certified and must be located in the same room as
the connected AMC2 device. Recommended maximum distance between power supply unit
and AMC2 is 3 m (9.84 ft).
Notice!
These specifications apply to power supply, readers, relay outputs, and extension interface.
Regarding inputs, specific voltage-drop values need to be taken into account. Refer to
Connecting Analog Input Devices, page 82.
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