ADEMCO VISTA 5140XM Anleitung zur Fehlerbehebung PDF herunterladen (Seite 10)

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Updated: 8/17/12

Tech Note

Using Multiple 4297 Polling Loop Extenders

= Total wire length on output side of each 4297.

Total wire length on input side of each 4297.

+ L

P2 +

…

PN +

) ≤

12,000 ft., unshielded; ≤

6,000 ft., shielded

E2 +

+ L

+…

PN + LPE

) ≤

12,000 ft., unshielded; ≤

6,000 ft., shielded

+ (L

+ L

P2 +

…

PN + LPE

) ≤

12,000 ft., unshielded; ≤

6,000 ft., shielded

Note:

The maximum number of 4297 modules which can be connected in parallel to a single system control is limited to

no more than 8, and by the maximum wire lengths specified above and the need for the Aux or Local power source

to supply 50 ma per 4297. For example, if five 4297 modules are used, the Aux or Local power source must supply

(5) (50) = 250 ma and the total system load current would be (5)(128)+128 = 768 ma, max. Also, from the above

relations;

If (L

+ L

P2 +

…

PN +

) = 1000 ft., then L

= L

=… L

≤ 5,000 ft., shielded.

≤ 11,000 ft., unshielded

Panel Polling

Loop Output

Control

4297

Aux or Local

Power Source

(50 ma per

Extender)

4297

Refer to Table 2 for maximum L

wire length per wire size , wire type, and total unit loads.

Refer to Table 2 for maximum L

wire length per wire size , wire type, and total unit loads.

Refer to Table 2 for maximum L

wire length per wire size , wire type, and total unit loads.

Refer to Table 2 for maximum L

wire length per wire size , wire type, and total unit loads.

Figure 2: Using Multiple 4297's

1 2 ... 5 6 7 8 9 10 11 12 13 14

Tech Note 1

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