18
en | Installing
Access Modular Controller 2
2021-04 | V04 | IM
Installation manual
Bosch Security Systems B.V.
4.5
Cabling
i
Notice!
Risk of malfunction
The cables used in the controller 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 for powering the controller
With the calculation below you can find out which cable type must be used. If you connect the
power supply and the controller 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 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
Critical condition! Install the power supply closer to the controller.
i
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.
Summary of Contents for Access Modular Controller 2
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