Yokogawa DO202 2-Wire Dissolved Oxygen Analyzer - Manual (Page 21)

IM 12J05C01-01E
General Specifications 2-10
2-8. Control Drawing of DO202S mA HART® Specification (CSA)
・ Electrical data of the DO202S.
- Supply and output circuit (terminals + and -)
Maximum input voltage V
max
= 31.5 V. Maximum input current I
max
= 100 mA.
Maximum input power P
max
= 1.2 W.
Effective internal capacitance C
i
= 22nF. Effective internal inductance L
i
= 35 PH.
- Sensor input circuit (terminals 11 through 18):
Maximum output voltage V
oc
= 14.4 V. Maximum output current I
sc
= 22 mA.
Maximum allowed external capacitance C
a
= 643 nF.
Maximum allowed external inductance L
a
= 70 mH.
・ Barriers and power supply should be CSA certified. The specifications must not exceed the
maximum values as shown in the diagram above. Installation should be in accordance
with Canadian Electrical Code, Part I.
Maximum safe area voltage should not exceed 250 V
RMS
.
For Class I, Div. 2, Group ABCD the CSA certified barrier is not required, and the
Sensor input circuit (terminals 11 through 18) is non-incendive having the parameters :
Maximum output voltage V
oc
= 14.4 V. Maximum output current I
sc
= 22 mA.
Maximum allowed external capacitance C
a
= 3.5μF.
Maximum allowed external inductance L
a
= 160mH.
・ The Hand Held Communicator must be of a CSA certified intrinsically safe type in case it
is used on the intrinsically safe circuit in the hazardous area, or of a CSA certified
non-incendive type in case it is used on the non-incendive circuit in the hazardous area.
S afe are a
V m ax = 3 1 .5 V o ltD C
Im ax = 1 0 0 m A
P m ax = 1.2 W att
C S A c ertifie d
P o w e r S up ply
(H A R T c o m pa tib le) )
O utp ut
S up p ly
S e nso r
term inals 1 1-1 8
+
_
G
S en sor
term in als 1 1 -1 8
H aza rd o us area S afe area
+
_
G
Fuctiona l
e arth Func tio nal
ea rth
Intrinsic ally safe d esign
C S A E x ia C la ss I, D iv.1 , G ro up A B C D ,
T 4 fo r am b ient te m p. < 5 5°C
T 6 fo r am b ient te m p. < 4 0°C
D O 2 0 2 S tra nsm itter
+
-
L o ad
R esistanc e
Im ax = 1 00 m A
V m ax = 31 .5 V o ltD C
H aza rd o us area
Func tio nal
earth
+
_
2 4 vo lts D C N o m inal
S up p ly V o ltage .
C S A ce rtified sa fety b arrier o r
p ow e r sup ply w ith R int= 30 0
:
(H A R T c o m p a tib le)
S u ita ble va lu es a re:
Fo r electrica l d ata:
see te xt be lo w .
Fo r e le ctrical d ata:
see text belo w .
S uitab le value s are :
Intrinsica lly sa fe d esign
C S A E x ia C la ss I, D iv.1 , G ro up A B C D ,
T 4 fo r am b ient te m p . < 5 5 °C
T 6 fo r am b ient te m p . < 4 0 °C
D O 2 0 2 S tra nsm itter