Bosch Appliances LTC 8800 Appendix C Quick Reference Cable Interconnections, Main Bay Video

LTC 8600 LTC 8800 Series en 115

Appendix C Quick Reference Cable Interconnections

C.1 Main Bay Video

COAX-All video input and output connections to the Allegiant system should be made using a good grade of RG59U, RG6, or RG11U coaxial cable using BNC con- nectors. The following guidelines should be used to insure selection of the proper cable type:

1.Center conductor of copper, not copper weld or steel. Use stranded wire where there will be cable movement as with pan/tilts, elevators, etc.

2.Copper braided shield at 93% coverage or better.

3.Cable impedance of 75 ohms.

4.Select cable based on target of no more than 15 ohms of center conductor resistance. A typical value for RG59U is 15 ohms per 300 m (1000 ft), therefore maximum cable run should be no more than 300 m (1000 ft). RG11U/RG6 is typically rated for 6 ohms per 300 m (1000 ft) which permits runs up to 760 m (2500 ft).

5.Use video amplifiers to extend cable distances beyond maximum limitations listed above.

C.2 Keyboards

•The keyboard comes supplied with 3 m (10 ft) of 6 conductor phone type cable with RJ-11 connectors. The cable plugs directly into the rear of the system's main bay on one end and into the back of the keyboard on the other end. Both data and power for the keyboard travel over this cable.

•An optional 30 m (100 ft) cable is also available.

•An optional kit which permits the keyboard to be extended beyond 30 m

(100 ft) is available and uses customer supplied shielded twisted pair. The kit consists of two “breakout” boxes which convert from the phone type cables to the shielded twisted pair and also provide for local keyboard power. Maximum distance using 24 gauge wire (Belden 9841 or equivalent) is typically 1.5 km (5000 ft).

C.3 Alarm Interface Unit

CONNECTION TO MAIN BAY

The Alarm unit is supplied with a 3 m long (10 ft) multiconductor cable with

9-pin D-type connectors. Power to the Alarm unit is provided by the Allegiant's main bay using the supplied cable. There are provisions to remote the bay which would then require local 12 VAC power and a minimal 3 wire RS-232 communication link.

ALARM INPUTS

The alarm inputs can be dry contact closures or logic levels. Connection to the Alarm unit is made to removable screw type terminal blocks and the use of simple twisted pair wire is acceptable.

F.01U.127.393 2.0 2009.03 Instruction Manual Bosch Security Systems, Inc.