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Yokogawa EXA SC202 2-Wire Conductivity Transmitter/Analyzer Manual de usuario Pagina 17

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IM 12D7B3-F-E
Spécifications 2-10
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Model EXA SC202S-F
Model EXA SC202S-P
No revision to drawing without prior
FM Approval
Title : FM Control Drawing SC202S-F & SC202S-P (Intrinsic safe Entity
concept)
Number : FF1-SC202S-00 Page : 8 of 10
Revision : 2.4
YOKOGAWA EUROPE B.V.
Date : 26/07/2004
Sensor(s) are of a passive type to be regarded as ’simple apparatus’, devices which
neither store nor generate voltages over 1. 5 V, currents over 0.1 A, power over 25 mW or
energy over 20
M
J, or are FM Approvals entity approved and meet connection
requirements.
Electrical data of the EXA SC202S -F & SC202S-P :
-
Supply circuit:
Maximum input voltage Vmax=24 V
Maximum input current Imax=250 mA
Maximum input power Pi=1.2 W
Effective internal capacitance Ci=73 7 pF; Effective internal inductance Li=2.6 M
H.
-
Sensor input circuit:
Maximum output voltage Vt=14.4 V; Maximum output current It= 12.8 mA
Maximum allowed external capacitance Ca= 103 nF
Maximum allowed external inductance La= 200 mH
Any FM Approved barrier may be used that meets the following requirements:
Voc or Vt
b
24 V
Ioc or It
b
250 mA
Poc or Pt b
1.2 W
Ca b 737 pF + Ccable; La b 2.6 MH + Lcable
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).
Associated apparatus connected to the barrier 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.
Unclassified Location
Classified Location
Division 1
FM Approved
barrier
Voc (Vt) ¡Ü
24 V
Ioc (It) ¡Ü
250 mA
Poc (Pt)
¡Ü
1,2 W
Ca
¡Y
737pF+ Ccable
La ¡Y
2,6 H + Lcable
I.S.
certified
Terminator
EXA
SC202S-F &
SC202S-P
Sensor
Connections
Max. cablelength: 60 mtr.
Cable dia. : 3 1 2 mm.
FM Class I, DIV. 1, Group ABCD
T4 for ambient temp.
b
55 `C
T6 for ambient tem
p
.
b
40
`
C
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