DSC PC6010 Manuel d'utilisateur télécharger pdf (Page 10)

NOTE: New versions of the PC6204 power supply module have

a jumper marked ‘J1’. Ensure that this jumper is configured for

“Combus Relay.” Otherwise, the power reset function will not

operate. For more information regarding the PC6204, please

refer to the PC6204 Installation Instructions.

3.7 Backbone Operation and Wiring

The Backbone is used by the control panel to communicate with

the PC6442 and PC6443 modules. Connect the BCKB YEL and

GRN terminals, and any COM terminal to the backbone terminals

on the PC6442 and PC6443 modules.

The PC644X modules have independent power supplies and do

not draw power through the Backbone.

Follow the same wiring rules and capacitance limits for wiring

the Backbone, as for wiring the Combus. Modules can be home

run, connected in a daisy chain or T-tapped anywhere on the

Backbone.

The following rules MUST be followed when wiring the

Backbone:

1. The Backbone must be run in minimum 22-gauge wire.

2. No module can be more than 1000' (305m) in cable length

from the main control panel.

3. Shielded wire should only be used in areas that present

excessive RF noise or electromagnetic interference. If shielded

wire is used, the maximum distance a module can be located

from the main panel is significantly reduced. Check the

capacitance limit of the wire to calculate the maximum

distance (see “Capacitance Limits” below).

4. The total capacitance of the Backbone wiring must not

exceed 80nF (see “Capacitance Limits” below).

Capacitance Limits

An increase in capacitance on the Backbone will affect data

transmission and will cause the system to slow down.

Capacitance will increase for every foot of wire added to the

Backbone. The capacitance rating of the wire used will

determine the maximum length of the Backbone.

For example, 22-gauge, non-shielded, 4-conductor wire has a

typical capacitance rating of 20 picofarads per foot (which is

20nF/1000’). For every 1000' of wire added – regardless of

where it is run – the capacitance of the Backbone will increase

by 20nF.

The following chart indicates the total Backbone wire allowed

depending on the capacitance rating of the wire used:

Wire Capacitance per

1000'(300m)

TOTAL Combus Wire

Length

15nF 5300'/1616m

20nF 4000'/1220m

25nF 3200'/976m

30nF 2666'/810m

35nF 2280'/693m

40nF 2000'/608m

Wires run in parallel also increase Backbone capacitance. For

example, when using 20nF wire, the following would be some of

the combinations allowed:

• Four wire runs at 1000'/305m each

• Six wire runs at 666'/203m each

• Eight wire runs at 500'/152m each

• 10 wire runs at 400'/122m each etc…

NOTE: Contact the wire manufacturer for the capacitance

ratings of the wire being used.

3.8 Zone Wiring

Zones on the system are wired according to the diagrams below.

Once you have selected which type of zone supervision you

require, you must program the “Zone Supervision” section. See

Section 5.1 “Zone Supervision” for instructions.

NOTE: Fire, LINKS Supervisory, and LINKS Answer zones always

use single EOL supervision, regardless of the programmed

zone supervision (see section 3.9 “Specialized Zone Wiring”).

If the zone is armed and then is violated, the zone will be in

alarm. The system will transmit the alarm, and the bells will

sound until the end of the Bell Time Out, or until silenced by a

user. If the zone is violated again before the first alarm is

cleared, the bells will not re-sound.

No End of Line (No EOL)

All No EOL zones are normally closed loops. The zone will be

violated when it is open.

Single End of Line (EOL)

All Single EOL zones have a 5600Ω resistor across them. If the

zone is shorted or open, it will be violated. Resistors should

always be placed at the device end of the wire run.

If programmed as a fire zone, the open zone will generate a

trouble condition and the short will generate an alarm.

Double End of Line (DEOL)

All Double EOL zones have two 5600Ω resistors across them.

DEOL loops will allow the panel to detect zone faults, zone

tampers, violated zones and restored zones. Resistors should

always be placed at the device end of the wire run. The zone

loop response is 320mS.

NOTE: Only normally closed detection devices can be used

with this type of zone supervision. Only one normally closed

contact can be connected to each zone; multiple detection

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DSC PC6010 Manuel d'utilisateur Page 10

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