Yokogawa EXA SC202 2-Wire Conductivity Transmitter/Analyzer - Manuel (Page 14)

IM 12D7B3-F-E
2-7 Spécifications
Stamp Company :
Stamp Certification Institute :
Signature :
Remarks : Model EXA SC202S-A No revision to drawing without prior FM Approval
Title : FM Control Drawing SC202S-A (Intrinsic Safety) Number : FF1-SC202S-00
Page : 5 of 10 Revision : 2.4
Sen
sor
te
rm
in
al
s
11
-1
6
Max
. c
ab
le
len
gth
: 6
0
m
tr
.
C
ab
le
dia
. :
3
12
mm.
Sen
sor
te
rm
in
al
s
11
-1
6
M
ax
. c
ab
le
le
ng
th
: 6
0 m
tr
.
Ca
bl
e
dia
.:
3
12
mm.
n
cla
ss
if
ie
d
Lo
ca
tio
n
FM
A
pp
ro
ve
d
Po
w
er
S
up
pl
y
(H
A
R
T
c
om
pa
ti
bl
e)
O
ut
put
Su
ppl
y
+ _ G
C
la
ss
if
ie
d
Lo
ca
tio
n
U
nc
la
ssi
fie
d
Lo
cat
io
n
+ _ G
Pr
ote
cti
ve
ear
th
Pr
ote
cti
ve
e
ar
th
In
tr
in
si
ca
lly
s
af
e d
es
ig
n
FM
C
la
ss
I
, D
iv
.1
, G
ro
up
A
B
C
D,
T
4
fo
r
amb
ie
nt
te
m
p.
<
5
5¡
C
T
6
fo
r
amb
ie
nt
te
mp
. <
40¡
C
E
XA
SC
202
S
ana
lys
er
+
-
L
oa
d
R
esi
sta
nc
e
Cl
ass
if
ie
d
Lo
ca
tio
n Pr
ote
ct
iv
e
e
ar
th
+ _
24
v
olt
s
DC
No
mina
l
Sup
ply
V
olt
ag
e.
FM
A
pp
ro
ve
d
saf
et
y
ba
rr
ie
r o
r
po
we
r s
up
ply
wi
th
Ri
nt
=
30
0
Ω
(H
A
R
T
c
om
pa
ti
bl
e)
Fo
r ele
ctr
ica
l da
ta:
see
tex
t b
elo
w.
Fo
r ele
ctr
ical
data:
se
e
tex
t b
elo
w.
In
tr
in
si
cal
ly
s
af
e d
es
ig
n
FM
C
la
ss
I,
D
iv
.1
, G
ro
up
A
B
C
D,
T
4
f
or
a
mb
ie
nt
tem
p.
<
5
5¡
C
T
6
f
or
a
mb
ie
nt
tem
p.
< 4
0¡
C
E
XA
SC
20
2S
an
al
yse
r
Fi
gu
re
1
Fi
gu
re
2
•
Electrical data of the EXA SC202S : - Supply circuit (terminals + and -): - Sensor input circuit (terminals 11 through
16):
Maximum input voltage V
max
= 31.5 V. Maximum output voltage V
t
= 14.4 V.
Maximum input current I
max
= 100 mA. Maximum output current I
t
= 12.8 mA.
Maximum input power P
i
= 1.2 W. Maximum allowed external capacitance C
a
= 103 nF.
Effective internal capacitance C
i
= 22 nF. Maximum allowed external
inductance L
a
= 200 mH.
Effective
internal
inductance
L
i
= 22
µH.
•
If Hand Held Terminal (HHT) is not connected to the power supply lines of the EXA SC202S (see figure 1):
Any FM Approved barrier or power supply may be used that meets the following requirements.
V oc
or V
t
≤ 31.5 V
; I
sc
or I
t
≤ 100 mA; C
a
≥ 22nF + C
cable
; L
a
≥ 22
µH + L
cable
If HHT is connected to the power supply lines of the EXA SC202S (see figure 2): The Hand Held Terminal must be FM Approved. Refer to the manufacturers control drawing of the HHT and the barrier/power supply to determine the cable parameters.
(V
oc
or V
t
) + V
HHT
≤ 31.5 V; (I
sc
or I
t
) + I
HHT
≤ 100 mA; C
a
≥ 22nF + C
cable
+ C
HHT
; L
a
≥ 22
µH + L
cable
+ L
HHT
When installing this equipment, follow the manufacturer
s installation drawing.
Installation should be in accordance with ANSI/ISA RP 12.06.01
Installation of Intrinsically Safe Systems for Hazardous
(Classified) Locations
and the National Electrical Code (ANSI/NFPA 70).
Control equipment connected to the barrier/power supply must not use or generate more than 250 Vrms
or Vdc.
•
Resistance between Intrinsically Safe Ground and earth ground must be less than 1.0 Ohm.
WARNING
-
Substitution of components may impair Intrinsic Safety
-
To prevent ignition of flammable or combustible atmospheres, disconnect power before servicing or read, understand and adhere to the manufacturer
s
live maintenance procedures.
YOKOGAWA EUROPE B.V.
Date : 26/07/2004