Example 2: regeneration is required after using 20 m additional extension cable plus 20 active
devices.
Example 3: regeneration is required after using 20 m additional extension cable plus 40
passive units.
Example 4: regeneration is required after a loop-through of 10 active devices, plus 5 passive
devices, plus 40 m additional extension cable.
Notice!
The standard 2 m long device cables connected to active or passive devices are included in
the limit and examples above.
Limit 4: Tap-off connections
The maximum number of tap-off connections in succession between the central control unit
and the last tap-off in a branch is four. If there are more than four tap-off connections in
succession, the system does not operate correctly.
Limit 5: Cable-lengths
– With regenerative tap-offs, the maximum cable length is 250 m from the central control
unit to the furthest device in any branch of the DCN. The maximum cable length of 250 m
includes the device cables and extension cables.
– Open-ended cables can cause an incorrect operation of the system.
Refer to Maximum power consumption, page 69.
Conference System Planning | en 65
Bosch Security Systems B.V. Operation Manual 2013.11 | V2.0 | DCN-NG_OM_V4.x
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