TT-107IU Silicone Keyboard - Technical Documentation
15.05.2012 © E.L.B. Ex-Geraete Bachmann GmbH Page 6
4
Marking for Hazardous Areas
-
Model designation:
TT-107IU
-
Marking for gas atmospheres:
II 2 G Ex ib IIC T4
-
Marking for dust atmospheres:
II 2 D Ex ibD 21 T95°C
-
Ambient temperatures:
-20°C < T
amb
< +60°C
-
Certificate no.:
IBExU 11 ATEX 1016
Meanings of the markings:
5
Intrinsically Safe Supply and Data Transmission
Electrical values of the keyboard TT-107IU:
-
maximum input voltage:
U
i
≤
5.9 V
-
maximum supply current:
I
i Supply
≤
500 mA
-
maximum data line input current:
I
i Data
≤
85 mA / line
-
maximum supply power:
P
i Supply
≤
2.3 W
-
maximum data line input power:
P
i Data
≤
0.5 W / per line
-
maximum inner total capacitance:
Σ
C
i
≤
40 µF
-
maximum inner total inductivity:
Σ
L
i
≤
1 µH
TT-107IU must be supplied by an ATEX certified intrinsically safe supply,
which fits to the electrical data listed above. This is
valid for the dust atmosphere models too. We
recommend the USB-supply series W...-Q,
which is meant for operating inside of gas
hazardous areas.
In dust atmosphere however USB sockets are not allowed, because the contacts are not dust
protected. (Danger of ignition of conductive dust.)
II 2 G Ex ib IIC T4 II 2 D Ex ibD 21 T95°C
G
ro
u
p
I
I
=
n
o
m
in
in
g
C
a
te
g
o
ry
2
=
z
o
n
e
1
(
fr
e
q
u
e
n
t
o
r
lo
n
g
l
a
s
ti
n
g
d
a
n
g
e
r)
G
a
s
a
tm
o
s
p
h
e
re
i
=
i
n
tr
in
s
ic
a
lly
s
a
fe
,
b
=
o
n
e
-f
a
ilu
re
s
a
fe
ty
G
a
s
g
ro
u
p
(
II
C
=
m
o
s
t
s
e
v
e
re
)
C
la
s
s
o
f
s
u
rf
a
c
e
t
e
m
p
e
ra
tu
re
d
u
ri
n
g
d
a
m
a
g
e
(
T
4
:
≤
1
3
5
°C
)
G
ro
u
p
I
I
=
n
o
m
in
in
g
C
a
te
g
o
ry
2
=
z
o
n
e
1
(
fr
e
q
u
e
n
t
o
r
lo
n
g
l
a
s
ti
n
g
d
a
n
g
e
r)
D
u
s
t
a
tm
o
s
p
h
e
re
i
=
i
n
tr
in
s
ic
a
lly
s
a
fe
,
b
=
o
n
e
-f
a
ilu
re
s
a
fe
ty
D
=
d
u
s
t
D
u
s
t
z
o
n
e
2
1
M
a
x
im
u
m
s
u
rf
a
c
e
t
e
m
p
e
ra
tu
re
d
u
ri
n
g
d
a
m
a
g
e
S
ig
n
o
f
th
e
t
e
s
t
b
o
a
rd
T
e
s
t
y
e
a
r
T
e
s
te
d
a
c
c
o
rd
in
g
t
o
A
T
E
X
s
ta
n
d
a
rd
s
C
e
rt
if
ic
a
te
n
u
m
b
e
r
IBExU 11 ATEX 1016