Yokogawa DO202 2-Wire Dissolved Oxygen Analyzer - Manual (Page 17)

IM 12J05C01-01E
General Specifications 2-6
2-4. Control Drawing of DO202S mA HART® Specification (IECEx)
・
Electrical data of the DO202S.
- Supply and output circuit (terminals + and -):
Maximum input voltage U
i
= 31.5 V. Maximum input current I
i
= 100 mA.
Maximum input power P
i
= 1.2 W.
Effective internal capacitance C
i
= 22 nF.
Effective internal inductance L
i
= 35 PH.
- Sensor input circuit (terminals 11 through 18):
Maximum output voltage U
o
= 14.4 V. Maximum output current I
o
= 22 mA.
Maximum allowed external capacitance C
o
= 643 nF.(for DO202S-A)
C
o
= 3.5 μF(for DO202S-N)
Maximum allowed external inductance L
o
= 70 mH. (for DO202S-A)
L
o
= 160 mH. (for DO202S-N)
・
Barriers and power supply specification must not exceed the maximum values
as shown in the diagram above. These safety descriptions cover most of the
commonly used industry standard barriers, isolators and power supplies.
・
The Hand Held Communicator must be of a IECEx certified intrinsically safe type
in case it is used on the intrinsically safe circuit in the hazardous area or of
a IECEx certified non-incendive type in case it is used in the non-incendive circuit
in the hazardous area.
D O 202S D issolved O xygen -transmitter)
Safe area
U o = 31.5 V olt D C
Io = 100 mA
Po = 1.2 W att
Ex ia or ib Certified R epeater
Pow er Supply
(HART C ompatible)
O utput
Supply
SEN SO R (S)
term inals 11-18
+
_
G
SEN SO R (S)
term inals 11-18
Zone 0 or 1
Hazardous area Safe area
+
_
G
Functional
earth Functional
earth
Intrinsically safe design
IEC Ex standard Ex ia IIC : T4 for ambient temp. < 55°C
T6 for ambient temp. < 40°C
C ertificate nr. IECEx KEM 06.0055X
D O 202S
+
_
Load
Resistance
Ex ia or ib
Certified safety barrier or pow er
w ith R int=300
:
Io = 100 mA
U o = 31.5 V o lt D C
Zo ne 0 o r 1
Hazardous area
Functional
earth
+
_
24 volts D C N ominal
Supply V oltage.
Intrinsically safe design
IEC Ex standard Ex ia IIC: T4 for ambient temp. < 55°C
T6 for ambient temp.< 40°C
C ertificate nr. IECEx KEM 06.0055X
(HART compatible)
(D issolved O xygen -transmitter)