system limits

1 DCNW Tech SD Design CalcST/PRM3-EU | |23.Nov.06 © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of

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Security Systems

System Limits

1. Control facilities CCU Wireless 245 addresses max.

Max. 150 Wireless Discussion Units Max. 93 Interpreter desks Max. 2 DDI’s (Intercom Operator and Ambient Mic)

Channel selectors are passive units and using one reserved address for all. Reserved addresses are not a part of the 245!

2. Power handling Capacity Central Control Unit 130 Watt Extension Power Supply 255 Watt

3. DCN Cable length After 100 meter of system cable the signal needs to be regenerated.

Units with the regenerating signal-outlets: Trunk Splitter & Trunk Splitter protected Extension power supply

The number of serial tap-off connections from the Wireless CCU to the last tap-off in a branch must not exceed 4.

250 meter max. from the Wireless CCU to the last unit in the trunk.

I&U Instructions



Security Systems

Power Consumption in Watt (DCN part)

Dual Delegate Interface 4.5 W Inclusive all connected FM panels.

Interpreter’s Desk 3.6 W

Channel selector unit 0.9 W

Data distribution unit 2.0 W

Extension Power Supply 0.8 W

Trunk Splitter 1.3 W

Trunk Splitter Protected 1.4 W

Watt value includes the 2 meter (6.5 ft.) unit-cable.



Security Systems

Wireless Access Point4.0 W

Audio Expander Analogue 7.6 W

Audio Expander Digital 6.0 W

Cobra net interface10.5 W

Optical Network splitter 3.9 W

Fiber Interface (POF/GOF or GOF/POF) 4.6 W

Power Consumption in Watt (Optical part)

I&U Instructions



Security Systems

Trunk Tap-off

Power handling capacities

Central Control Unit Extension Power Supply

65 W 65 W

65 W 65 W

130 W

65 W

85 W 85 W

255 W

85 W

I&U Instructions



Security Systems

Max. number of units within 100M from CCU

Max. per trunk: 18 Interpreter desks

Max. all trunks: 36 Interpreter desks

Central Control Unit

Cable length per outlet to the last unit 100M

1 n 18

I&U Instructions



Security Systems

Max. number of units within 100M from EPS

Max. per trunk: 23 Interpreter desks

Max. all trunks: 69 Interpreter desks

Trunk Tap-off

Cable length per outlet to the last unit 100M

Extension Power Supply

1 n 23

I&U Instructions



Security Systems

Trunk Outlet & Tap-Off Outlets

For Trunk-cable splitting with regenerating the digital signal.

*

Tap-off outlets which regenerating the digital signal.Tap-off outlets which regenerating the digital signal.

* *


* *

Trunk-in Trunk-outTrunk Splitter

Trunk SplitterProtected

I&U Instructions



Security Systems

Using the Trunk Splitter Protected

* *

* Tap-off outlets with a limitation of 4,5 Watt.Tap-off outlets with a limitation of 4,5 Watt.

I&U Instructions



Security Systems

Tap-Off Limitations

Trunk Splitter

Tap-off

Tap-off Trunk-lineLoop Through

Trunk-line

1st Tap-off

1st Tap-off

3rd Tap-off

2nd Tap-off

2nd Tap-off

3rd Tap-off

4th Tap-off

4th Tap-off

5th Tap-off

Extension Power SupplyCentral ControlUnit

I&U Instructions



Security Systems

Maximum Cable Lengths 250M

Central ControlUnit

RegenerativeTap-offTrunk Splitter

ExtensionPower Supply

RegenerativeTap-offTrunk Splitter

ExtensionPower Supply

I&U Instructions



Security Systems

The length of cable used in a system hasa direct influence on the load of a

system.

The second in- line trunk- splitter has two extension cables connected to it, with lengths of 20 m and 50 m.

When determining the cable length of a Trunk-outlet or Tap-off outlet, the longest extension cable only is taken in to account.

Therefore, the total extension cable lengthfrom a single Trunk-outlet of the CCU is calculated as 10+50= 60 m (196.8 ft.)

Longest Extension Cable example

10 m (32.8 ft.)

50 m (164 ft.)20 m (65.6 ft.)

Central ControlUnit

I&U Instructions



Security Systems

Power calculation Example-1

TrunkOutlet

Longest ExtensionCable length

Power consumptionwithout

ext. cable correction

Power consumption with


1 65 m. (213.2 ft.) 46.6 Watt 63.9 Watt

2 40 m. (147.4 ft.) 54.0 Watt 64.8 Watt

Total power in use 128.7 Watt

Central Control Unit

10x 5x

40m.1 2



Security Systems

Power calculation Example-2

TrunkOutlet

Longest ExtensionCable length

Power consumptionwithout


Power consumption with


3 60 m. (196.8 ft.) 63.4 Watt 84.5 Watt

4 40 m. (131.2 ft.) 70.6 Watt 84.7 Watt

5 35 m. (131.2 ft.) 72.0 Watt 84.3 Watt

Total power in use 253.5 Watt

Trunk Tap-off


10x35m.

10x

3 4 5



Security Systems

Cable correction graph

I&U Instructions



Security Systems

Fiber Interface

The fiber interface is used to: convert from plastic optical fiber

(POF) cable to glass optical fiber (GOF) cable and vice versa.

cover distances of more than 50 m in the optical network.

I&U Instructions



Security Systems

Nodes Cable lengths graph

I&U Instructions



Security Systems

Coverage Area Wireless Access Point

The maximum coverage area of the wireless access point is dependent upon its power.



Security Systems

How to Design and Calculate a system

End of section

system limits

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