Protectowire 2000 FireSystem Dokumentacja Pobierz pdf (Strona 44)

~ 41 ~

MTL-5061

ZONE #2

ZONE #1

ZONE 2

%@D9?>L!M>DB9>C93)165DIC?<1D?B

6?B)@5391<1J1B4@@<931D9?>C

)(&*%$

In some hazardous area applications, the loss of ground fault detection in non-safe field circuits is unacceptable. Such cases require

the implementation of DC isolators. These devices provide three part isolation between the initiating circuit input, output and power

supply circuits of each unit. Also intrinsic safety is provided without the need for special earth grounding which reduces the cost in

most installations.

%&(*%$

Intrinsic Safety is accomplished through DC isolation provided by a small ferrite current limited transformer and demodulators.

With this segregation spikes and other circuit abnormalities that occur in the non-safe (primary side) areas are eliminated due to the

transformer isolation from the safe (secondary side) area circuit. When the secondary loop is shorted by a Protectowire activation,

the primary attempts to compensate for the additional current drain of the secondary by drawing more current from the initiating

circuit activating it into an alarm. If the secondary is opened through a wiring fault, the primary compensates by decreasing the

current drain on the initiating circuit resulting in a trouble indication.

%&*%$*%(/#+*+"&&(%,%$"/

MTL-5561

0(%+)

*(#$")

#%+$*$*(!

)*(#$")

#*"N)%"*%(NN*-%N$$"N$*($)N)*/(((

(($"%(#.#+#&(%**%-("$*)

#*"

C?<1D?B

)&"$%*)

1. ALL intrinsically safe wiring =ECD259C?<1D54

6B?=>?>C165G9B9>71>4B?ED549>1C5@1B1D5

3?>4E9D

2. $?>)165 wiring =ECD>?Dcross into safe wiring

area segregated by black lines within the system

enclosure.

3. A ground fault to the hazardous area side of the

DC isolator(s) G9<<>?D25 detected. All other cir-

cuit ground faults will be detected.

4. Suitable for hazardous locations Class I, II and

III, Division 1, Groups A through G.

5. Not compatible with Option “A” Alarm point

location meter.

6. Reference control drawing IL-1008-2 for installa-

tion.

7. The FS2000 control panel and associated intrinsic

safety barriers =ECD be installed and located out-

side of the hazardous area.

"*("

Nominal Input Voltage 24VDC

Current to insure alarm 12.5 mA

Short Circuit current 35 mA

Supervisory current 4.5 mA

End-of-line resistor ELR-4.7K, 1/2W (Class B only)

1 2 ... 39 40 41 42 43 44 45 46 47 48 49 ... 62 63

Komentarze do niniejszej Instrukcji

Brak uwag

Protectowire 2000 FireSystem Dokumentacja Strona 44

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Systemy kontroli dostępu bezpieczeństwa Protectowire 2000 FireSystem