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OverviewTh e H A Z A R DW A TC H TG DU T M s ys te m is a rugge dize d a n d

mobi le ga s mon itor in g s olut ion de s ign e d f or quick

de ployme n t in to a w ork a re a w ith in a C la s s 1 D iv 1 or

Z on e 1 c la s s i f ie d zon e to provide prote ct ion a ga in s t

e x plos ive or tox ic ga s c louds .

E a ch s ys te m con s is ts of on e f la me proof ce rt i f ie d ( E X d ) con trol pa n e l a s s e mbly a n d up to e igh t f la me proof

ce rt i f i e d ( E X d ) ga s de te ctor a s s e mbl ie s .

Th e s ys te m is f u l ly progra mme d, f u l ly a s s e mble d, f u l ly

w ire d a n d f ul ly te s te d w h e n i t i s s h ippe d f rom th e

f a ctory. D e ployin g th e s ys te m in to f ie ld ope ra t ion is

f a s t a n d e a s y s in ce i t w ould on ly re quire th e pla ce me n t

of th e in div idua l a s s e mbl ie s a t de s ign a te d loca t ion s ,

con n e ct in g th e pre - w ire d f ie ld ca ble s a n d s w itch in g on

th e pow e r.

Th e con trol le r i s f a ctory con f igure d a n d progra mme d

f ol l ow in g ma n uf a cture r s s ta n da rd codin g. Th e

s ta n da rd s ys te m f un ct ion a l i ty i s k e pt s imple by de s ign

s o th a t th e s ys te m ca n be e a s i ly un de rs tood a n d be

de ploye d quick ly f or f ie ld ope ra t ion s . For s pe cia l

n e e ds , cus tomize d or more comple x f un ct ion a l

progra mmin g ca n be de ve lope d a s re quire d.

Th e ba s e of th e con trol pa n e l a s s e mbly a n d ga s

de te ctor a s s e mbly a re de s ign e d to a ccommoda te s pe cia

c la mps th a t w ould s e cure th e a s s e mbl ie s on to gra te d

s te e l f loor in g typica l ly us e d f or e le va te d proce s s un its

f oun d in of f s h ore oi l r igs or on s h ore proce s s p la n ts . A

s e t of th e s e s pe cia l c la mps a re in c lude d w ith e a ch

a s s e mbly. For in s ta l la t ion on con cre te f loors , f loor

bolts w i l l re pla ce th e s pe cia l c la mps .

TGDU

Figure 1 General arrangement of a TGDU system

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Figure 3 Control panel assembly dimensions

Control Panel Assembly

Th e con trol pa n e l a s s e mbly con s is ts of a f la me proof

e n clos ure a n d a 2 me te r ta l l s e l f - s ta n din g f ra me . Th e

s e l f - s ta n din g f ra me is con s tructe d f rom s ta in le s s s te e l

a n d is de s ign e d f or e a s e of mobi l i ty a n d f re que n t rough

h a n dl in g. On e f la me proof be a con a n d on e f la me proof

h orn a re moun te d a t th e top of th e a s s e mbly f or a re a

a la rm a n n un cia t ion . A n E X d ce rt i f ie d e le ctr ica l s w itch

is loca te d be low th e e n clos ure f or e le ctr ica l f e e d

con n e ct ion . E X e ce rt i f ie d ca ble quick con n e ctors a re

in s ta l le d a t th e bottom f a ce of th e f la me proof

e n clos ure f or con n e ct ion to ga s de te ctor a s s e mbl ie s .

In s ide th e e n clos ure a re a progra mma ble logic con trol le r , a re ct i f ie r , re la ys , c i rcuit bre a k e r a n d

te rmin a ls . F igure 4 s h ow s th e in te rn a l ge n e ra l

a rra n ge me n t.

G re e n a n d re d f la me proof in dica t ion la mps a re moun te d

on th e ex te rn a l f ron t f a ce of th e e n clos ure . Th e s ela mps provide s ys te m ope ra t ion a l s ta tus .

Table 1 Lamp flashing codes

I n h i b i t e d N o r m a l T r o u b l e

N o A l a r m H i H i A l a r m H i a l a r m

A ls o moun te d on th e f ron t f a ce of th e e n clos ure a re k e y

ope ra te d f la me proof s w itch e s th a t con trol th e

in h ibit in g a n d re s e tt in g of in div idua l ch a n n e ls . Tw o

f la me proof pus h button s f or ch a n n e l re s e t a n d a la rm

a ck n ow le dge comple te th e e x te rn a l compon e n t l in e up.

Table 2 Operation of pushbuttons and switches

N o a c t i o n S i l e n c e s o u n d e r

L a m p t e s t i f

d e p r e s s e d f o r

m o r e t h a n 5

s e c o n d s

R e t u r n s y s t e m t o

n o r m a l s t a t e i f

d e p r e s s e d w i t h

k e y - s w i t c h i n

i n h i b i t p o s i t i o n

C h a n n e l i n h i b i t e d C h a n n e l i n h i b i t e d

Figure 2 External view of control panel

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Figure 4 Internal layout of control panel

Gas Detector Assembly

Th e ga s de te ctor a s s e mbly in c lude s a ga s de te ctor, a

s ta in le s s s te e l c la mp- on pipe moun tin g bra ck e t, a 2

me te r ta l l s ta in le s s s te e l moun t in g pole a n d a 50

me te rs lon g f i re re ta rda n t f le x i- ca ble f i t te d a t on e e n d

w ith a n E X e ce rt i f ie d ca ble con n e ctor.

Th e c la mp- on pipe moun tin g bra ck e t on w h ich th ede te ctor i s a tta ch e d to ca n be h e igh t a djus te d s o th a t

th e a s s e mbly ca n be e a s i ly s e tup to de te ct e i th e r

h e a vie r th a n a i r or l igh te r th a n a i r ga s e s .

Th e a tta ch e d ca ble re e l k e e ps un us e d le n gth of ca ble

n e a t ly be low e a ch de te ctor a s s e mbly.

Figure 5 Cable reel & floor clamps

Figure 6 Detector on height adjustable mounting bracket

Figure 7 Dimensions of gas detector assembly

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Features & Benefits

Z on e 1 ce rt i f ie d a n d IP65/ NE M A 4X a s s e mbl ie s Suite d f or outdoor Z on e 1 h a za rdous loca t ion s R ugge dize d de s ign A ble to w ith s ta n d f re que n t s e tup a n d te a rdow n R obus t l igh tw e igh t s ta in le s s s te e l f ra me H igh porta bi l i ty Progra mme d, a s s e mble d a n d f ul ly w ire d s olut ion Pe rmits f a s t de ployme n t in to s e rvice Fun ct ion a l ly compa t ible w ith a l l G e n e ra l M on itors

a n d M SA ga s de te ctors

W ide ra n ge of ga s de te ct ion s olut ion sa va i la ble

System Specif ications

C a pa city In puts : U p to 8 x 0- 20mA

( A n y a n a logue s ign a l

t ra n s mitt in g ga s

de te ctors )Outputs : 1 x volt- f re e con ta ct

1 x R S485 ( M OD B U S)

In dica t ion s : U p to 8 x re d la mpsU p to 8 x gre e n la mps

C on trols : U p to 8 x k e y s w itch2 x pus h button s

Pe rf orma n ce A la rm re s pon s e t ime : W ith in 1 s e con d of ga s

le ve l de te ct ion a bovea la rm th re s h old

C a bl in g De te ctors : 3- con ductor s h ie lde d

ca ble , f i re re ta rda n t,

50 me te rs

C on ta ct outputs : 4 c o n d u c t o r c a b l e ( by

o th ers )

Se r ia l commun ica t ion output: IE E E R S485 compl ia n t

ca ble ( b y o th ers )

E le ctr ica l f e e d: 3- con ductor ca ble ,ra te d 10A @ 24VD Cmin imum ( b y o th ers )

E n viron me n ta l Ope ra t in g te mpe ra ture : 0C to 55C

Stora ge te mpe ra ture : - 20C t o 6 0C

Ope ra t in g h umidity: 10- 85% R H

E X c la s s i f ica t ion C on trol pa n e l e n clos ure : I I 2G D E x d I IB T5

E le ctr ica l i s ola t in g s w itch : I I 2G E E x e d I IC T6

G a s de te ctors : R e f e r to re s pe ct ive

de te ctor da ta s h e e t

E le ctr ica l A C in put pow e r: 85 264VA C ( 45- 65H z)

M a x . 2. 4A ( 120VA C )

M a x . 1. 3A ( 230VA C )

M a x . 240W

DC output: 24VD C +/ - 1% , 5A

M e ch a n ica l Bo d y m ater ia l

C on trol pa n e l e n clos ure : A lumin um ( e pox y

pa in te d)

C on trol pa n e l f ra me : SS304

De te ctor moun t in g pole : SS304

C la mp- on bra ck e t: SS304

C a ble quick con n e ctor: Bra s s or SS

C a ble gla n ds : Bra s s or SS

De te ctor: R e f e r to re s pe ct ive

de te ctor da ta s h e e t

Weig h t

C on trol pa n e l a s s e mbly: 80 k g

De te ctor pole a s s e mbly: 25 k g ( w ith de te ctor

a n d ca ble )

In g ress p ro tect io n C on trol pa n e l e n clos ure : NE M A 4 / IP65

For more details, please contact us at:

Block 5 AMK TECH II, Unit 05-22/23,Ang Mo Kio Industrial Park 2A, Singapore 567760Tel: +65-6482-1921Fax: +65-6482-3582Email: info@gmsystems.com.sg