Bosch KBE-335V55-20 Instruction Manual download pdf (Page 15)

KBE and KBN Series Installation | en 3

Bosch Security Systems, Inc. Instruction Manual F01U065975 | 1.0 | 2007.04

6. Attach the housing to the mount in accordance with the KBE and KBN Series Instruction

Manual.

3.6.2 Wiring Do’s

1. Use point to point unshielded twisted pair wire, 24 AWG or thicker, stranded or solid,

Category 2, 3, 4, or 5.

2. The video signal may coexist in the same wire bundle as other video, telephone, data,

control signals, or low voltage power.

3. Measure the wire distance. Use only receivers designed for that distance.

4. Make sure the pair of wires carrying the video signal is sent as a twisted pair, not a split

pair.

3.6.3 Wiring Don’ts

1. DO NOT USE SHIELDED TWISTED PAIR WIRE, as this will severely degrade the distance

performance. Short runs may be used with some signal degradation. Multi-pair wire with

an overall shield is OK.

2. DO NOT USE UNTWISTED WIRE, as this will reduce the inherent immunity to

interference.

3. DO NOT allow your installation to have bridge/ taps, loading coils, talk-battery, or MOV

type protectors. Bridge taps refer to a twisted pair connected to two twisted pairs (such

as an extension phone). Bridge taps cause reflections as the signal propagates, resulting

in ghosts in the image.

4. If the phone company is providing the cable runs between buildings, make sure it is dry

copper (i.e. it should have none of the following: dial tone, 48 V, loading coils, bridge

taps, switching, or long paths to the phone company's central office and back).

5. Due to near-end cross talk, DO NOT send a transmit and receive signal in the same wire

bundle. Exceptions: Less than 1000 ft (304.8 m), or Category 5 cable up to 609.6 m

(2000 ft).

6. For safety, never put signals in the same conduit as high voltage wiring.

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Bosch KBE-335V55-20 Instruction Manual Page 15