Yokogawa EXA ISC202 2-wire Conductivity Transmitter/Analyzer - Manual (Page 19)

IM 12D06A03-01E
Specifications 2-7
2-3. Control Drawing ISC202S mA HART® Specification (IECEx).
・ Electrical data of the ISC202S.
- 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 17):
Maximum output voltage U
o
= 14.4 V. Maximum output current I
o
= 20 mA.
Maximum allowed external capacitance C
o
= 600 nF (for ISC202S-A),
C
o
= 3.5 PF (for ISC202S-N)
Maximum allowed external inductance L
o
= 88 mH (for ISC202S-A),
L
o
= 200mH (for ISC202S-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.
ISC 202S ((Inductive C onductivity-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
ISC 40S Sensor
term inals 11-17
+
_
G
ISC 40S Sensor
term inals 11-17
Zo ne 0 o r 1
H azardous area Safe area
+
_
G
Functional
earth Fanctional
earth
Intrinsically safe design
IEC Ex standard Ex ia IIC : T4 for ambient temp. < 55°C
T6 for ambient temp. < 40°C
ISC 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
Fanctional
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
(HA R T compatible)
(Inductive C onductivity-transmitter)
C ertificate nr. IEC Ex KEM 06.0054X
C ertificate nr. IEC Ex KEM 06.0054X