Bosch AMC-4W - Physical and Environmental Data; Conductor Data and Voltage Drop

Access Controller AMC-4W Technical Data
Bosch Security Systems | V.3.1/2006-09 Installation Guide 19
Protection Class IP20
Environment
temperature
0°C to 45°C
Humidity Up to 95%, without condensation
Housing material Bottom: PPO (UL 94 V-0), THK 2mm (0,08inch)
Top: Polycarbonate (UL 94 V-0), THK 2mm
(0,08inch)
Dimensions (W/H/D) 225mm x 88mm x 60mm (8.9" x 3.5" x 2.4")
Weight: app. 0,4 kg (0.9 pounds)
Conductor data for
connection to power
supply
For short distances below 25m (75 feet) use AWG18
conductors. For higher distances install an additional
power supply close to the AMC-4W.
Please, calculate the voltage drop by checking the
conductor specifications for characteristic resistance
values. The voltage drop shall not exceed 2V.
Example:
Length = 100m/328 ft
U = 12V, I = 1A, maximum V
Drop
= 2V
i.e. R
AWG18
(acc. specs) =
ft1000
385,6
Ω
or 20,948
km
Ω
V
Drop
= 20,948
Akm
km
11,0 ⋅⋅
Ω
= 2.1V
V
Drop
=
Aft
ft
1328
1000
385,6 ⋅⋅
Ω
= 2.1V
Critical condition! Install the power supply closer
to the controller.
Conductor data
relay outputs
Use AWG18 conductors.
Please, calculate your voltage drop (see above) by
checking conductor specifications for characteristic
resistance values.
Conductor data
analog input
Use AWG22 conductors.
Please, calculate your voltage drop (see above) by
checking conductor specifications for characteristic
resistance values.