Yokogawa EXA SC202 2-Wire Conductivity Transmitter/Analyzer - Manual (Page 19)

IM 12D08B02-01E
2-6 Specifications
2-4. Control Drawing SC202S mA HART® Specification (IECEx)
SC 202S (C onductivity/R esistivity-transmitter)
Safe area
U o = 31.5 V o lt D C
Io = 100 mA
Po = 1.2 W att
Ex ia or ib C ertified R epeater
Pow er Supply
(HA R T C ompatible)
O utput
Supply
SE N SO R (S)
term inals 11-16
+
_
G
SEN SO R (S)
term inals 11-16
Zo ne 0 o r 1
H azardous area Safe area
+
_
G
Functional
earth
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. IEC Ex K EM 06.0053X
SC 202S
+
_
Load
R esistance
Ex ia or ib
C ertified 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
H azardous area
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. IEC Ex K EM 06.0053X
(HA R T compatible)
(C onductivity/R esistivity-transmitter)
Functional
Functional
・ Sensor(s) are of a passive type to be regarded as ‘simple apparatus’.
・ Electrical data of the SC202S.
- 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 16):
Maximum output voltage U
o
= 14.4 V. Maximum output current I
o
= 13 mA.
Maximum allowed external capacitance Co = 59 nF (for SC202S-A),
Co = 2.9 PF (for SC202S-N).
Maximum allowed external inductance Lo = 200 mH (for SC202S-A),
Lo = 450 mH (for SC202S-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.