NGC-20 INSTALLATION MANUAL
11
2. InsTAllATIon
For installation/operation, always observe the Equipment Safety Law, the rules of
generally accepted engineering practice (IEC60079-14/EN 60079-14), and the instructions
stated in this Manual. Carry out work on the thermostats in the de-energized state only.
2.1 Tools required
Figure 3: tools required for installation
2.2 mechanical installation
DigiTrace NGC-20-CL-E units comprise a temperature controller and a safety
temperature limiter installed in one enclosure. The controllers can be installed in any
position either on a stable structure by means of the 4 mounting holes. Alternatively the
DigiTrace NGC-20-C(L)-E units can be mounted directly on a pipe by means of a support
bracket type SB-125. In order to provide enough stability the support bracket needs to be
attached on to the pipe by means of 2 pipe straps.
Figure 4: Mounting positions NGC-20
2.3 Temperature sensors
The DigiTrace NGC-20C(L)-E temperature inputs are designed as intrinsically safe circuits
(IEC 60079-11/EN60079-11 Ex [ib]) therefore any type of three wire DIN IEC 751 Class B
PT100 resistance temperature devices can be used. The DigiTrace NGC-20-CL-E supports
3 local temperature inputs, where 2 are allocated to the temperature controller (RTD 1
and RTD 2). The third temperature input is reserved for the temperature limiter (RTD
limiter). DigiTrace NGC-20-C-L units on the other hand do not support the third input
(RTD limiter)
2.3.1 lead compensation of RTD connections.
DigiTrace NGC-20-C-E and DigiTrace NGC-20-CL-E units are capable of providing up to
20 Ohm lead resistance compensation. This implies that sensor connections may be
extended using a three core shielded or braided cable with a maximum length of up to
150 meter. (3 x 1.5 mm² minimum required) The screen or braid of the extension cable is
to be grounded at the controllers end only.
100
- 2
54
VA
C
He
at-T
rac
ing
Tem
per
atu
re C
ont
rol
Un
it
Tem
per
atu
rre
gle
r fü
r Be
gle
ithe
izu
nge
n
Unité de
Con
trôle de
Tempér
atur
e pour
Traçage
Elec
trique
Bas
eef
a08
ATE
X01
84X
I
EC
Ex
BA
S 0
8.0
047
X
II
2 G
D
GB
Ex
e m
b ib
IIC
T*
Se
e S
che
du
le
Db
Ex
tD
A2
1 IP
66
T95
°C
Lot
/Lo
s/L
ot N
°:
Ser
ial
nu
mb
er i
nsi
de
Ser
ien
nu
mm
er i
nn
en
N°
de
sér
ie à
l’in
ter
ieu
r
Op
era
tin
g v
olt
age
:
Bet
rie
bss
pan
nu
ng
:
Ten
sio
n n
om
ina
le:
PN
-12
44-
007
035
118
0
Mo
dB
us:
Co
nn
ect
ion
s /
An
sch
lüs
se
/ R
acc
ord
em
ent
s
Sw
itch
cu
rre
nt
de
-ra
tin
g t
ab
le /
Ta
be
lle
tem
pa
rat
ura
bh
än
gig
er
Sch
alt
str
om
/
Tab
lea
u d
e d
ég
rèv
em
en
t co
ura
nt
de
co
up
ure
Tex
te
Fra
nça
is d
an
s le
m
an
ue
l te
chn
iqu
e
De
uts
che
Te
xte
sie
he
Be
trie
bsa
nle
itu
ng
Temp
era
tur
e C
las
s T
5
Ambi
ent
temp
. ran
ge
Maximu
m swit
ch curr
ent
–40
°C – +5
0°C
25 A
Temp
era
tur
e C
las
s T4
Ambie
nt
temp
. range
Ma
ximu
m swi
tch c
urr
en
t
–40°C – +54°
C
20 A
–40°C – +56°
C
16 A
–40
°C – +5
6°C
25 A
Leu
ven
, Be
lgi
um
Ex
i
Co
nn
ect
ion
s /
An
sch
lüs
se
/ R
acc
ord
em
ent
s
Ex
e
100 -
254
VAC
Heat-
Tracin
g Tem
pera
ture C
ontro
l Unit
Tem
pera
turre
gler f
ür Be
gleith
eizun
gen
Unit
é de C
ontr
ôle
de
Tempé
ratur
e pour
Traçage
Elec
trique
Base
efa0
8ATE
X018
4X I
ECEx
BAS
08.0
047X
II
2 G
D
GB E
x e m
b ib I
IC T*
See
Sch
edule
Db E
x tD
A21
IP66
T95
°C
Lot/L
os/Lo
t N°:
Seria
l num
ber in
side
Serie
nnum
mer i
nnen
N° d
e sér
ie à l’
inter
ieur
Ope
ratin
g vo
ltage
:
Betrie
bssp
annu
ng:
Tens
ion n
omin
ale:
PN-1
244-0
0703
5
1180
Mod
Bus:
Conn
ectio
ns / A
nsch
lüsse
/ Ra
ccord
eme
nts
Swit
ch c
urre
nt d
e-rat
ing t
able
/ Ta
belle
tem
para
tura
bhän
gige
r Sch
altstr
om
/
Table
au d
e dé
grèv
em
ent c
oura
nt d
e co
upu
re
Texte
Fran
çais d
ans l
e m
anu
el te
chn
ique
Deu
tsch
e Tex
te sie
he B
etrie
bsan
leitu
ng
Tem
pera
ture
Class
T5
Am
bien
t tem
p. ra
ng
e
Max
imum
sw
itch
curre
nt
–40°C
– +5
0°C
25 A
Temp
eratu
re C
lass
T4
Am
bie
nt te
mp. r
ange
Max
imum
sw
itch
current
–40°C
– +
54°C
20 A
–40°C
– +
56°C
16 A
–40°
C – +
56°C
25 A
Leu
ven
, Belg
ium
Ex i
Conn
ectio
ns / A
nsch
lüsse
/ Ra
ccord
eme
nts
Ex e
3 mm terminal screwdriver
7 mm screwdriver
Trimming knife
25 mm spanner (for 20 mm glands)
36 mm spanner (for 20/25 adapter)
ü
www.ze-gmbh.de
info@ze-gmbh.de
ZIEGLER ENGINEERING
