Bosch Appliances Comprehensive Guide to the Tap Off Unit and Cable Length Limits

Digital Congress Network Installation and Operating Manual Chapter 10 - Installation Techniques en 10-5

10.3.2 Using Tap-Off unit LBB 4115/00

The Tap-off unit LBB 4115/00 (FIG 10-5)provides short-circuit protection on the Tap-off connector. Each tap-off connector can accommodate up to a maximum of 2.5 PCF including a DCN units extension cable; for example:

10.3.3 Maximum cable lengths using Trunk-outlets and/or Tap-offs

Extension cables are used to extend the length of cable on DCN system units.The length of cable used, directly affects the PCF value of a system.

•Table-top units

- 2 x Concentus Delegate, Chairman units or Interpreter Desks

•Flush mounted units

-1 x Dual Audio Interface unit

or 1 x Multi-purpose connection unit or 5 x Channel selector units.

NOTE: The Tap-off connector can handle up to 2.5 PCF per outlet (1x Concentus unit per tap-off)

Tap-offs

Trunk-line

LBB 4115/00 Trunk-line

Trunk-line LBB 4115/00 Trunk-line

Tap-offs see Note

System limits (FIG 10-6)

1.The total cable length (using standard LBB 4116/xx cable) between the CCU and the last unit in any branch of the system must not exceed 250 m (820 ft.).This includes all extension cables and the 2 m (6.5 ft.) cable attached to each system unit.

2.The total length of the cable from the CCU to the first regenerative tap-off (i.e. from Trunk Cable Splitter LBB 4114/00, Audio Media Interface Unit LBB 3508/00 or Extension Power Supply Unit LBB 4106/00 must not exceed 100 m (328 ft.).

3.The total length of the cable between regenerative tap-offs outputs must not exceed 100 m (328 ft.).

Port 1	Rec.	Line	Trunk
In		In
Out		Out	115 V -T4A 230 V -T2A
		Symmetrical

LBB 3500/xx

Max. cable length = <100 m (328 ft.)			Max. cable
	Trunk-line
			length =
			< 100 m
			(328 ft.)
Tap-off outlet				Max. cable
	Regenerative			length =
				< 100 m
	tap-off			(328 ft.)
	LBB	4114
Tap-off outlet	LBB	3508
	LBB	4106

Termination plug LBB 4118/00

(for use with Channel selector panels LBB 3524/10 and LBB 3526/10)

Regenerative
tap-off
LBB 4114
LBB 3508	Max. cable length = <100 m (328 ft.)
LBB 4106

Tap-off outlet

Max. cable length = <50 m (164 ft.)

Trunk outlet

FIG 10-5 LBB 4115/00 Tap-off unit limitations FIG 10-6 Maximum cable lengths

Bosch Security Systems 04-2003 3922 988 43318 en Trunk outlets and Tap-offs