Siemens DOW1171 - Function

Structure and function
Function
3
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Building Technologies
009865_m_en_
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Fire Safety
2015-11-06
3.10 Function
The FDCW221 communicates with the control panel via the FDnetdetector line.
The range of the radio signal in buildings is up to 40 m and is heavily dependent on
materials and equipment.
If the radio cells overlap, the maximum number of radio gateways is limited to 16
radio gateways or radio cells because of the limited number of channels available.
If there is no radio cell overlapping, the maximum address connection factor for the
FDnet detector line limits the number of devices connected (radio gateways,
detectors).
A maximum of 30 radio detectors can be connected to a radio gateway. Each radio
detector has its own address. The radio gateway itself has two addresses.
The radio
gateway may only be operated on a loop in the
FDnet
. Since the radio
gateway and connected radio detectors form a stub, this configuration must never
be used in stub operations. If it is, an impermissible 'stub-on-stub' topology will
result.
Two radio cells on the FDnet
1
FDnet–compatible control panel
(FC20xx, AlgoRex, Sigmasys)
3 Radio cells
2 FDnet detector line